How to Waterproof Basement Walls With Flex Seal Products

[@TheFixerHomeRepair]

See how this has held up almost 3 years later! kzbin.info/www/bejne/oJLEl4Gkpal8g9U

[@JillofAllTrades2]

Was about to ask how it's been holding up. I have terrible efflorescence on brick foundation/basement walls. I imagine I will have to go super slowly because of getting the material into all the mortar joints. And then there are the bricks themselves. Oh fun! On my list to tackle next year.

[@darrylchase3688]

It was clear that the wall is deteriorating on the inside due to someone trying to seal the wall previously. Paint trapped moisture in the cement, eventually degrading it and leaching the lime out, weakening the cement. By sealing it in again with Flex Seal, you'll accelerate the deterioration. You need to keep water from penetrating on the outside of the wall, all the way to the footing, and drain it away from the foundation. You may also need a sump pump if water remains under the slab. Flex will hide the problem.

[@SpinoRexy733]

Except he said he sealed from the outside already, pay attention before making an ass of yourself.

[@clwnpRon]

I just learned about this the other day, you are spot on. You can't paint your problems away.

[@britneyystaples91]

Yes but in some instances you cant just dig a 10 foot hole around your whole house. Like if you have boulders for a foundation with concrete over it. My house has granite boulders that extend 5 feet away from my house.

[@darrylchase3688]

@@britneyystaples91 There are always options--exterior drains, regrading the slope away from the foundation, sump pumps. etc. "Painting" the interior wall is the worst possible approach.

[@poopywelder]

If you watch the video that's the first thing he says is to fix the outside first 🤷‍♂️

[@jwickert3]

Glad you mentioned addressing the outside first. If you just seal the inside you will build up hydrostatic pressure and possibly crack your concrete foundation. Best thing you can do is regrade your property so that it slopes away from the house for at least 3 ft.

[@Chris_at_Home]

The only moisture I get is condensation in the summer. Our foundation is sealed and then has 2 layers of 2” blueboard. Our soil is like a gravel pit. I like the idea of a surface like flex seal.

[@djjinerson]

Most insurance policies do NOT cover hydrostatic pressure unless added as an endorsement

[@adriansmith7104]

Even when you regrade water sips into ground, expands and still reaches your basement. I have done it and now I'm digging a moat

[@susang82]

Hey thanks for the tip..we have a major water problem in our basement because of the way our property slopes..

[@c_mac7773]

You have to dig around the entire perimeter of your house down to the footings about 16 inches from the wall out. Clean the entire wall and coat it with tar or silicone is even better if you have a clean surface than use a fiber mesh membrane then another thin coat of either tar or silicone. Then you should use half inch rigid insulation all the way around and if you want to do an amazing job seal the seams of the 4 x 8 insulation. Your basement will never leak a drop. Sealing from the inside is nearly useless. I would never ever finish my basement if the exterior walls were not perfectly sealed.

[@johnhouli3450]

Matt I have used on my basement walls 3 walls facing backyard and facing outwards a product called Thoroseal ic came in a 5 gallon bucket metal all powder and mix according to directions and add about 2 ounces of a liquid product called Thoro T1668 Acryl 60 Cement bonding agent. The covering has lasted 25 years no water. We’ll it’s time do do it again. It’s started to peel. So I will scrape what is bubbled and then clean it up and apply with A cement brush the thickness of pancakes mixture. The best Houli

[@mja8433]

Could we get an update on the walls ? we are nearly in january, i would like to see how they are doing now that the winter is upon us :)

[@Mattyew]

I let my concrete just stay as is and put a humidifier and sump pump down there. Keeps it dry without compromising the safety of the concrete by locking moisture in there with the sealant. Specifically for freezing climates where the water expands

[@josefcalderonromero8452]

You saying you finished your basement without doing any type of sealing? If so how is it after you did it? Is it working out for you? Im trying to finish my basement and I really don’t know if just start building without sealing or just do some type of sealing.

[@josefcalderonromero8452]

Thanks in advance

[@CariMachet]

Exactly > never seal a concrete wall in your basement they need to breath just like you

[@TheBeastKane]

@@josefcalderonromero8452 You don't seal your basement you lock in moisture and the cement will degrade over time. You should install a moisture barrier to allow water to move. You need to let it breathe.

[@Matt-xj2bx]

The safety of the concrete,?

[@BatistaInvests]

Thank you for taking the time to create this video. People don't truly understand what it takes time wise to create these videos and offer them with the same kind of quality and care that you have. Well done.

[@TheFixerHomeRepair]

Thanks a lot for that, Michael. I really appreciate it!

[@mysticprint1663]

I JUST bought my first bucket of Flex Seal, I will be putting this on my basement wall after prepping. It gets pretty humid here in southeast Michigan and I can't wait to see the results. Thanks!

[@josephpuchel6497]

Hello How did flexseal work out for you

[@jeaniemalone5304]

We have been removing old waterproofing/sealing in our garage that was applied decades ago by a previous homeowner. We are going to apply Damtite hydraulic cement in cracks then coat with the Damtite maximum coverage waterproofer. It is supposed to let the concrete/cinder blocks breathe and it is warrantied for ten years when applied in two coats.

[@amya9597]

I love how clean it looks with the white! I have pondered painting our basement walls but I keep seeing conflicting videos where some say you can paint your basement walls and other people say you should never paint your walls because they are supposed to “breathe.” Love it on your walls!

[@cekone123]

Ideally just like this guy said In the begining you would dig out your outside and seal the outside wall then your concrete still breaths inside

[@RandomNumber141]

If you don't have a moisture barrier on the external side, painting is not a great idea. My basement walls are ugly and rough, and since the house was built in 1967 the basement is not suited to finishing. I was considering painting the walls but I think it would be less trouble to put panelling up that lets the walls breathe and can be removed easily.

[@DoritoWorldOrder]

Looks great now, will completely ruin the wall in a few short years. DO NOT do this to your own basement. The people saying you need to let your below-grade concrete walls "breathe" are absolutely correct. If you want to paint them for cosmetic finishing reasons, there are paints made specifically for this purpose that result in a porous and breathable surface. You can paint your basement walls, just not with a water-tight sealant product!

[@mstoi38]

@@RandomNumber141 I was wondering if paneling would be a good idea after using these products. I may have to do this for a house my husband just inherited. We haven't been in the basement yet to determine yet.

[@coppulor6500]

@@mstoi38 home inspector here. I would never cover foundation walls with anything, nor would I finish a basement UNLESS I had corrected exterior grading. I've only ever seen one situation with a single family home where you could not fix all water problems by fixing the grading and extending downspouts, adding some splash guards at the bottom of valleys and adding additional downspouts. And perhaps upsizing the gutters if they're old. Yes that's more costly than simply coding the inside of the foundation but.... pay now and no worries or pay later with mold, health etc and have to do all things anyway.

[@777Timberwolf]

thank you for showing me the basement wall "paint" by using Flex Seal. The white Flex Seal looks great in the basement, it just looks like you painted white (my preference) and very clean = ❤

[@davidsmith2562]

I was always skeptical about Flex Seal when watching their ads on TV. But after watching this video, I have a favorable opinion of Flex Seal now. They just now got a new customer. 😊

[@anthonyb8405]

Wow that stuff is pretty legit!! I would have brought the flex seal down on to the floor for two reasons... 1..to seal the seam between the wall and floor and two.. to give you a sealed surface for when you install your bottom plates when framing the walls. In my basement i used Sika self leveling concrete sealant for any gaps or cracks (especially between the wall and floor), then painted down off the exterior walls 4" to really seal the transition area off. I then used foam sill plate gasket and pressure treated 2x4s for all the bottom plates. Post more videos of framing when you get to that stage.

[@steenfraosterbro3268]

Where I live we have mostly brick houses. Sealing your walls like this you have a pretty good chance of the moisture raising up and getting into your wooden beams. Looks good though

[@rebeccaramirez-]

my work sells this...im glad to see this video so i can encourage sales

[@sixshooter3313]

How long before it pulls away from the wall. Any surface seal is only as good as the base surface. Rubber wont stick to a surface if any moisture is present. kind of like painting over rust on metal.

[@johnquist3539]

I used a different rubber product 15 years ago. It worked great and and looked great in the beginning. After 10 years the cement wall started to pit an blow chips off the sealed rubber wall. The rubber started to split and Peele. The cement needs to breathe. I have spent the last three years grinding the rubber seal off the cement walls. Patching as he did with hydraulic cement and two coats of DryLock will work better. DryLock lets the cement breathe.

[@gregmize01]

Looks great Fixer! Plus the added bonus of a much brighter basement!

[@TheFixerHomeRepair]

Yes! Looks waaaaayy better than it did!

[@Mikkeyboyy]

@@TheFixerHomeRepair for now take hammer to it in a couple years oh oh

[@davidkoba]

It is super important to seal the outside. That is where the moisture is coming from and if you don't it will cause your waterproofing on the inside to fail due to hydrostatic pressure. The only thing I know that works for that would be an epoxy but even then you will be sealing moisture in the wall which is also bad for reinforcement.

[@equipt4sound]

00:04:00 the video begins highlighting this importance to fix the outside, this is an exterior grade product which when used inside will create a hydrotrap for the materials of the foundation. The solution in this case is to slope groundwork around the house away from the foundation and then decide upon a water shedding system that will direct water from the roof away from the building. Cosmetic appearances of the interior can then be addressed with interior grade materials.

[@davidkoba]

@@equipt4sound Yes I saw that I was reiterating.

[@equipt4sound]

@@davidkoba the video is somewhat amusing as it shows the the exterior problem area dug out at which time a bag of concrete could have been chucked into the hole and performed a better fix; as an extra step the concrete mix could be removed from bag and actually mixed then poured into the hole as an even more advanced solution; instead though we have what amounts to interior remodeling. 😂

[@davidkoba]

@@equipt4sound Interesting solution. I will try that on the next one lol.

[@maeveplant2220]

CONGRATS!!!!! I'm so happy for you that you got a sponsor!!

[@tylorwetmore]

Thank god for KZbin and thank god for your video.

[@TheFixerHomeRepair]

😁😁 Hope the video helps! Thanks for watching, Tylor!

[@rdm1000]

I can't speak to it working with the flex seal, but when I am using a cheapie brush and even a roller that I plan on tossing, but I'm not finished with the job, I wrap them in aluminum foil, creating an envelope and pinch it closed. It prevents the paint from drying and I can pick up the next day where I started, not having wasted a brush. Both will stay usable in the foil for days. I just open the foil up, do my painting and slip it back in so I'm not wasting the foil either.

[@doubleu1017]

Our basement in our last house looked like yours. We used dryloc. It took forever to prep, make repairs, and apply the product. It was 1100 square feet. I feel your pain with this project.

[@doubleu1017]

@Dolores M good luck!

[@yeltsin6817]

My young neighbour is having all kinds of issues with his house. He’s 27 and clearly has no clue about a house. He asked me if I could take a look and let him know what I think Everything pointed to water. His eavestrough system is wrong. Multi downspouts in wrong spots, water pooling near foundation, cracks near all doors and windows, grade slopes wrong etc He wanted to fix the inside first. Told him don’t bother. Need to stop the water and get it away. We came up with a simple cost effective game plan and gonna help this kid out. Told him the eaves he’ll need to hire a company as he only has 4” and also needs to change all the drain points but the rest we can fix. He’s so excited.

[@yeltsin6817]

@@elizabeths7594 to me it is a temp fix. My suggestion to him is to divert and seal and then possibly do the flex seal but his concrete blocks inside have been painted multi times and flaking. To me the flex seal would need to be against the concrete directly but if he doesn’t do the first part, I think eventually the water will continue to push in.

[@paulineprojectlove]

Had to deal with a similar basement. Wish I had this product then. People need to remember that lead is in most old paint and to take proper precautions. Wear an organic mask, and collect paint chips in plastic. A can of lead paint was 90% lead!

[@TheFixerHomeRepair]

Yes that is true. Proper PPE is important. Thanks for the comment.

[@paulineprojectlove]

@@TheFixerHomeRepair I LOVE your work! I was exhausted after watching your timelapse livingroom reno. I couldn’t stop watching. You are an inspiration.

[@WackyPossum]

Not sure if you will see this comment on an older video, but is there an update on how this held up? My basement is starting to a leak a little where the concrete floor meets the cinderblock walls. please help

[@roannathephoenix8561]

Anyone with a basement should watch this.

[@TheFixerHomeRepair]

😁 👍 thanks, Roanna!

[@mikemcbain4250]

Dude! Love your videos. make an UPDATE video on this basement wall FLEX Coating stuff in a year or so! Then we can see how it holds up. That would be awsome!

[@HashBandicoot356]

I am no expert but I feel if you have a water in the basement problem and you seal the interior walls this way the water is just going to sit inside your wall after getting in from the exterior.

[@melvin_0bviously]

Sure, but concrete doesn’t mind being wet. At all. But you are right, you should give the water an outlet. I would add a French Drain inside the basement that drains to a sump pit with a pump. So, big thick pool liner painted on the walls (after multiple coats - check the specs to make sure the product can hold up or test in a smaller area first) and floor, perimeter French Drain draining into a sump pit with an airtight lid that’s sealed to the floor. Inboard of that by an inch or so, an insulated stud wall. No poly in the wall, no vinyl wallpaper. Insulate the floor with rigid foam and then sleepers and whatever floor covering you want. Done. The efflorescence comes from the concrete sucking groundwater in and as it dries inward to the basement, it leaves behind the salts from the ground. That is what blows apart the concrete. If you only wanted to fix the concrete, and not do the pool liner and insulation, use a lime-based stucco and coat the walls. When the stucco falls off in 20-100 years (depending on the skill of the stucco mixer and applicator), you add more stucco.

[@cocosmiles7369]

I agree with your assessment.

[@jeffkoog3240]

I did everything that you did it didn't matter it still leaks so I put a sump pump in and problem solved.

[@geppettobartoli4695]

Absolutely, interior waterproofing effectively works only if you address the root cause of the issue: water. By rerouting/pumping out the water you minimize the water table under your house and its pressure effects on your foundation/basement. This is truly the best way of mitigating leakage. Everything else (interior water proofing by drylock/sealing cracks) only compliments the rerouting/pumping of the water. However, he did address this at the start of the video.

[@SimgoWood]

I wouldn't do that. it looks like you have a 2 steps foundation. it is impossible to waterproof perfectly from the outside. but more work could have been done: digging as deep as you can, correcting the masonery, waterproofing from the outside and the key to succes: drainage, drainage and drainage. if you still have water inside, live with it or use a delta membrane to deflect the water in a trench and flush it with a pump. in my opinion it is never a good idea to seal an old leaking foundation from the inside. the concrete or mortar has no possibility to dry, it will saturate with humidity and continue to deteriorate. if you live in a cold place, freezing issues makes it even worse

[@Questchaun]

Nah 😂 just toss some sponsored flex seal on it.

[@SimgoWood]

@@Questchaun just like when I put a plastic bag in my leaking boots when working outside during the winter.

[@linkstale]

thats what im saying. i didnt know this having two properties in jersey. Now i have cracked foundations lol. Its fine though im not selling the houses anytime soon.

[@Schnooker55]

No science, all temporary, superficial, visual, easy, fast, useless corrections?? NO GUTTERS?? …..and the video tutorial continues. That foundation wall is a porous sponge with a very overpriced membrane rolled over the interior surface. That’s crazy. Enjoyed the wire brush. Homeowner KZbin wizards hurt many homeowners more but help us contractors endlessly. That wall is already in stages of screwed.

[@ldssggrdssgds6119]

Waterproofing starts on the outside...this to me seems like a band-aid and not a solution. I agree with you.

[@juneaskew6871]

EXCELLENT VIDEO! I have this problem in my basement and you explained my problem perfectly!. My problem now is the entire basement is drywall 🙄

[@chloesmom412]

I am so glad you did this video because I need to do this to my basement and this stuff looks like it works good.

[@sjr7822]

Yes, I was looking at skim coating, this video changed my mind

[@clant9325]

Hi you did a great job at that you did really really well and it is very difficult to paint drywall for the first coating

[@TheFixerHomeRepair]

😁👍👍

[@singlefather01]

Love to see what happens after a few years.

[@rodneyaker5111]

I used the flex seal tape to plug a 3 inch split in my pool liner seam. lasted two years and just blew out this winter in November. still a win to me.

[@ShiningSakura]

I love that you explain how to fully fix something inside and out followed by why you can't justify doing it. Pretty common sense stuff. It helps me have an insight on what I can do with my own place even if it has nothing to do with the video at hand. Fixes can easily be justified and get out of control if you don't take a step back and asses the issues at hand and realistically fix things instead of just redoing the whole house because abc fixes leads to xyz needs doing... while you are at it of course.

[@rayinpau.s.a.6351]

I have been doing some homework on painting my basement , and was not sure what to use ?. I have the old terra cotta blocks and they have an old basement smell to them . so i am planning on using Flex Seal because of your video . there are no water issues , just the smell . Thank You !

[@WAVE_ZERO]

Don’t do this if there’s no exterior barrier. Holding moisture against the concrete wall with an impermeable barrier on the interior side is the worst thing you can do for an exterior concrete wall. The moisture pulls acid from the soil and neutralizes the lime in the concrete and makes the whole structure deteriorate. They make specific Crystaline parging kits that fill all the microscopic cracks in the concrete and make it inpermeable and waterproof.

[@camping_with_tywan]

Can you make a suggestion for this crystalline product?

[@TheFixerHomeRepair]

I am with Mr. Reeko and would like to hear suggestions of crystalline products. Thank you for the feedback.

[@MrWolfSnack]

@@TheFixerHomeRepair The only company that makes this product he is talking about is a company called "Sakrete" and they only exist and sell their product in Canada. This follows the same with a company called "Xypex" which also makes crystalline parge but in a liquid pour form and not a premix. I have spent the last 10 mins searching and I cannot find anyone in the USA selling a crystalline based parge mix. Maybe it's not approved for USA market if this is a new product, or there is just no foundries/quarries in the USA that produce this. EDIT: Just found a company called "Sika" makes something similar for USA, its called "Sika WT-240 P" and it just hit the market in 2020.

[@sambrusco672]

@Kyle Lanoue is absolutely correct. DON’T USE ANY SEALER ON THE INSIDE OF ANY CONCRETE WALL!…….. @The Fixer was correct when he said get gutters; grade away from the house and apply sealer to the outside of the foundation…….. He should have done that, and only that!……. But he didn’t feel like doing all that back-breaking work, so he chose the LAZY MAN’S WAY OUT……..which is what most homeowners do!………. ANY SEALER ON THE INSIDE will make it look pretty and make your wife happy, but @fixer , just trapped water in the concrete, which will accelerate its degradation, but he won’t see it. Ignorance is bliss, until I bites you in the buttocks!

[@sekainiheiwa3650]

@@Yoshi70048 thank you

[@psfgtech]

Floors for me, and this is for my office in Florida, im just tired of paint thoughts of floors?

[@TheFixerHomeRepair]

I wouldn't recommend it. It would be very slippery with the smallest amount of liquid and the first chair you dragged across it would peel it up. Have you tried a "porch and floor" paint? It is tougher than regular latex.

[@flyjarrett]

I’m not sure I would ever do this. As he briefly mentioned in the beginning of the video, if water is seeping through your basement walls, you have bigger problems. Flex Seal only masks the problem - if I have a leak, I want to see it so it can be properly fixed.

[@saidtheblueknight]

He mentioned very thoroughly in the beginning that the first thing you should always do is start with the outside. Once that is done and sealed up, you move into the inside as he is doing now. Based on that, this is mostly as a moisture barrier and/or cosmetic look rather than a barrier for water seepage.

[@flyjarrett]

@@saidtheblueknight that’s kind of my point. In order to take care of the outside of your foundation, you would need to trench the entire perimeter of your house to clean, repair, and treat the outside of the foundation. It’s pointless to do just the exposed area or even a foot below the surface. Trenching is unnecessary and expensive unless you have known major problems. If you can’t trench, treat, and repair, you shouldn’t flex seal the inside of your basement.

[@roddaman7545]

@@saidtheblueknight So why do it? It’s not accomplishing anything, really. There ARE products / systems that you CAN use to waterproof basement walls from the negative (interior) side, but FlexSeal ain’t one of them. Look at Koster, Aquafin or CIM products developed and specified by people who know what they’re doing and MUST get it right.

[@redheadedgypsy1939]

What a great product, you turned me on to Flex Seal Shot, going to try the FS liquid on my basement, thanks for sharing Matt!!

[@djpee4979]

Too many negative comment and opinions. As a contractor i have used this product time and time again and it is a fabulous product. This guy prep the wall properly and applied this product the way it is suppose to be done. What i would like to add is. If your basement has a extreme moisture problem this is not the product for you. If you have minimal moisture issue this is going to work perfectly. He is absolutely right. Two coats is highly Recommend. I also recommend that you run a dehumidifier in your basement at all time after a project like this. Again. If your basement doesn't have a extreme moisture issue. This gentleman remady will work for you along with the dehumidifier. Those walls will look great for years to come.

[@rosegold7975]

Looked at the chemistry of Flex Seal awhile back. Amazing stuff. Should not be sold as an As Seen on TV product because it way better than some of the main brand products like Prosoco and Polywall.

[@roddaman7545]

If you’re using Prosoco as a negative side waterproofing, you’re probably ill-informed enough to try flex-seal for that too.

[@MrTonsocial2025]

Great video. Looking at all the positive and negative comments and I see it’s not for a basement that has serious leaks. Looks great after coated twice. Good job on that. But the issue I have is if the new homeowner moves in and does a complete redo of the basement and needs to get this stuff off im guessing it would cause damage to the cement blocks due to force needed to remove. Scenario number two would be new homeowner tried to paint over it and it won’t stick just like he states in the video.

[@the-bu3lb]

your holding moisture in the walls when you paint or apply any rubber paint ect meaning you will rot the wall the the lye will break down and crumble just so you understand

[@scotts1356]

BINGO

[@crinkle2649]

Can you use it on the inside of the under sink cabinet ?

[@FlexSeal]

FLEXTASTIC video, Matt! Thanks for sharing so many tips and tricks while using Flex Seal Liquid MAX. Keep Flexin' On! 😎💪🔛

[@TheFixerHomeRepair]

Thank you! I had fun making the video and my walls are sealed up nice and tight! 💪🔛

[@jodifinnegan4453]

Great video! I have used the Flex Seal caulking and the spray can sealer. Both are great products that really do the job. Can't wait to use the Flex Seal Max paint in my basement after seeing this video!

[@51-FS]

We used that on a basement floor. It sucked. Every time u drag something across it ot pills up

[@WonkaWillE]

And in a year its drying and cracking off 👍

[@wallpoop3039]

I PHIL SWIFT HERE WITH FLEX TAPE!

[@susanpeterson9558]

I have a similar problem in my basement. I have added a roof over my front entry and gutters and down spouts to divert the water away from the house. But I was looking for a solution for the exterior block and then the interior. I'm glad to see that you can use it both indoors and on the For the exterior I'm going to use the black and white inside. Thanks for the video, my only question is, at what temperature is it recommended for my exterior block repair? 😊

[@westside98]

Flex seal is NOT A negative side waterproofing product. If the exterior membrane fails so will the interior. Crystalline /ironITE waterproofing is the only real negative side product you should be using.

[@Bear_83]

If can't be found would the flex seal be the better alternative for the exterior sealing. For me about 45ft length and 4 foot deep?

[@beverlycollins4283]

Your basement looks great. I hope we get a follow-up video showing that you covered the whole basement and what it looks like now.

[@Mikkeyboyy]

yea after the wall caves in

[@julianurban3336]

Thanks Matt. Because of your video post I used the Flex Seal Liquid MAX on my basement project as well. Looks Great !!

[@smusyk2859]

If I ever get the opportunity to buy another house, I will definitely choose one without a basement, no amount of waterproofing on the inside can save u, if the outside is poorly built & not waterproofed

[@abdulhafizdada874]

Good morning...pls where can I get this material

[@ncironhorse8367]

I used flex seal liquid on a wooden door that was leaking through like a sieve and getting into my basement. After two coats the door no longer leaks!

[@markogletree2790]

Nice video I'm thinking about doing the same. But I want to put up some kind of paneling afterwards....any suggestions

[@georgiapeach7291]

Wow! What a difference. It also looks very bright and clean. Another project done. Something you don't have to worry about in the winter or rainy days. Awesome video as always. 🥰

[@sambrusco672]

🎵Georgia 🎵Georgia 🎵The whole year through…….. 🎵Sealer on the inside……. 🎵a bad idea…. 🎵water stayin’ in the walls!………🎵……… @Thefixer was correct when he said get gutters; grade away from the house and apply sealer to the outside of the foundation…….. He should have done that, and only that!……. But he didn’t feel like doing all that back-breaking work, so he chose the LAZY MAN’S WAY OUT……..which is what most homeowners do!………. ANY SEALER ON THE INSIDE will make it look pretty and make your wife happy, but @fixer , just trapped water in the concrete, which will accelerate its degradation, but he won’t see it. Ignorance is bliss, until I bites you in the buttocks!

[@bryanringstrand5971]

Should only apply this type of coating on the exterior since moisture won’t be trapped inside the walls. If you have water problems best option is to figure out how to move the water away from the foundation first then interior drain tile with sump pump. If you have water say in only one corner then excavating and repairing crack from exterior should be best option if corner is accessible.

[@normbograham]

fieldstone foundations, work because they do not slow down the water. If you stop the water from flowing thru, you will increase the hydrostatic pressure. Thus, if you successfully seal your basement, you could literally blow out a basement wall.

[@tstfrd]

I used this 10 years ago on the cabinet wood under the kitchen sink. In case there are any small leaks it would prevent warping the cabinet wood. It has worked well, but the fumes were intense, took two days for the house to air out. They may have improved it since then, did the Flex Seal you used have any Fumes?

[@rodneyfields4081]

Flex Seal did not work for me it started peeling off after about a month, Drylok worked much better but was more expensive. Stopping the water from entering in the first place is the key. Good luck with your leakage problems.

[@cassellmclean4882]

Can flex seal work on roof?

[@uelrington9270]

It looks really good and sealed , my son’s apartment Car garage is under ground floor , heavy heavy rain season water comes in garage from wall like yours , so is this method really stop water coming from wall ?? Could you please let me know if this is works well ,thank you

[@Julia-xf5ps]

Thank you ‼️thank you for a thorough video, of course Flex Seal paid for it, but, still you’ve told a great story 🌻

[@cekone123]

I just finished my fiance's closet in the basement with flex seal and you are crazy fr not wearing a mask. The smell is wild. Putting this stuff on concrete tiles made the basement floor way way warmer and it's super soft on your feet. I just couldn't afford to do rest of the basement. Spent 180$ on a tiny room

[@jwcsfsky9900]

Thank you for this video Matt and it really looks great. You are giving your home a whole new life. The Flex Seal is a great product but it also brings so much light to a basement. I hope the family is well sir.

[@TheFixerHomeRepair]

Yes, it is much brighter! Thank you, I hope all is well with you too!

[@groovylicks6]

Could you use a paint sprayer with it ???

[@pinkcheckers]

TRUE STORY HERE. I used flex seal in my basement to keep water/moisture out and it sort-of worked but, some time later I knoiced a small water bubble forming 😬 Ended up on taken it all off. Cemented the bottom of my walls which was the only thing that worked.

[@ShiP-jp8sb]

How did you "take it off"? Didn't know that was possible.

[@fintan3563]

Looks like a brand new basement! 👍

[@lindaroyal9260]

Awesome demonstrations,voice what this can do. I've used a stay flex to seal some leaks but very impressed on a bucket full of liquid. Question: is it possible to have it tinted, like we do paint, prior to application? Would timing it decrease the integrity? Does it come in any other colors besides bright white? I guess if you're going to put siding or some type of walls the color won't matter. Love your videos. Thank you

[@latonyahampton681]

Very good question. I need the answer to this too!

[@sweetpetuniafarm3102]

@@latonyahampton681 I have seen it tinted

[@samadamms3432]

I’ve found when painting concrete block, roll paint, then squeegee it, then roll again. You’ll find it forces paint into all the little cracks and holes. Probably work just as well with Flex Seal.

[@TheFixerHomeRepair]

Good tip! Thanks, Sam!

[@maxsteel6092]

This will not likely work as it is negative side as hydrostatic pressure is from the exterior to the interior. The best option is to waterproof the positive side (exterior) the next best option is a siloxane cementiouse slurry waterproofing. Flex Seal is a membrane waterproofing and will likely trap the water at the interior between the membrane and the concrete creating a water blister that will eventual erupt.

[@josephpuchel6497]

Hey nice work I’m wondering if you can dilute flex seal and roll out it easier. How is this holding up any water ?

[@mikewidget7610]

how many containers were used for the whole basement? I'm guessing 1500 to $2000 for materials. wet basements are fixed on the outside. concrete that can't air out will go bad behind that stuff. show it in a year, I'm thinking it'll start bubbling but still be stuck to what will be concrete "dust". again, show it after 4 full seasons

[@HENRYSBASEBALL]

WOW !!!WHAT A DIFFERENCE. IT CAM OUT GREAT!!!!!!

[@enchantedangel7]

I was so waiting for you to get started on the basement!!! This was awesome and it has me thinking about what to seal around the house. 😂 Great work in the walls! And thanks for giving us the real details on why you skipped doing the floor. Isn't there special paint/coating for concrete floors? I've seen this gray/blue speckled stuff being used lately. 🤔

[@GoCrAZy13332]

I just did basement walls with different product. Now doing floor INSL-X Tough Shield Patio and Floor Covering. It says it can be used in basement.

[@WinniePenny0410]

Epoxy?

[@hamilro44]

Would you recommend for basement floors. I get water seeping through the floors.

[@sandy-rr1by]

Is this what I should paint onto the outside foundation blocks above ground?

[@sarahmiller4797]

I have a huge tree in my front yard the branch is pushing against my basement wall to where it gets to about a foot deep of water when it rains the house was built in 1916

[@mikerules666]

Thank you for making this video. I have been wanting to use it myself, but wasn't sure how well it would cover or how it would look. I must say that I am thoroughly impressed with the way yours turned out. I will be buying some and using it in my basement. Thanks again to you and to Flex Seal as well. :)

[@bmingo2828]

Do not do this. It doesn’t last and can degrade your foundation.

[@marcelinotorres456]

@rockgod333, this is not what you want to do. you will trap water in your foundation wall and it will degrade. you want to waterproofi from the outside or use a cementitious coating that will grow into the concrete when applied from the inside.

[@mikerules666]

@@marcelinotorres456 Thank you for the tip. I have already coated the exterior and no more water is getting in. I want to use the on the interior to prevent all the chipping and peeling that paint causes. ☺️

[@gdub2812]

@@mikerules666 I really hope you didn't do this. You'll never know when water is getting in until it's too late once you've done this

[@danapassero2232]

Thank you for a very helpful video Matt!!!!!

[@yell0wberry]

That stuff definitely works, before encountering this particular video, I used this stuff to paint over a tarped roof about more than four years ago and it hasn’t given me a problem since. These so-called experts who are making comments on here should absolutely realize that if you provide protection between both sides of the concrete, there’s no way in hell water gets inside of it, so no technicalities necessary, just common sense. Also, the one thing the narrator did not disclose to the viewers is that as great as flex seal works, it definitely stinks and it will stink for a little while before the product finally dries

[@ShiP-jp8sb]

I really want to use this product on my basement walls. I just ordered a tub, but to be honest I am a little nervous to use it. We have zero issues with water as our basement is dry (my husband is a drainage guy so it has been done correctly on the outside). The reason for using it would be strictly to have the smooth clean feeling coating on the concrete so the room feels a bit more finished as a rec room. I see many comments asking what it looks like now and how it held up. Without showing us the product now or providing and update it almost seems like maybe it didn't work so well and there is something to hide. If you still stand behind this product and are providing the link to purchase it, I think you should take a few minutes to record a short clip of even a section of basement and how it held up. Thank you very much.

[@TheFixerHomeRepair]

It held up fine. Is just how I applied it that day. Maybe a few scuff marks from tools and scrap wood. If I get a chance I will make an updated video. A LOT of people have their own opinions about whether or not this should be used for a basement. I can’t recommend it for yours specifically but it worked great for mine. Hope this helps. 👍

[@boblupart862]

I'm a simple man with simple ideas....but this feels like a waste of effort since the water will just seep into the concrete from the outside in still?

[@joban7851]

Job well done The Fixer & Flex Seal.

[@davidszakacs6888]

The proper way to fix a leaky basement is to dig around the foundation and seal THAT wall. Rolling sealer on the inside will only be a temporary fix until the block gets saturated and starts caving in.

[@TheFixerHomeRepair]

2:58 😁👍

[@justinfiorini3142]

It's literally what he said. Glad to see you took the time to watch the video before you shit on it.

[@caseywalter11]

might you recommend this for the interior wall of a basement cinder block shower? can the flex seal withstand hot water temps?

[@ArcolaBridge]

Bad idea... clean and parge the wall with masonry repair. Then install a sump pump system along the floor of the walls. Coating the walls with paint or rubber or tar will not allow it to breathe and dry. The concrete will then become waterlogged and deteriorate faster. You have water building up along the outside of the foundation of that house with nowhere to go which is why it's coming in through the wall.

[@TheFixerHomeRepair]

Thanks for the feedback.

[@davidjames666]

if you freeze at @4:03, I think we see a future problem now, and know what needs to be done there. I would let the water seep/ drain out on the inside. Now when it stays in the wall, the porus wall is not deep enough if there is a freeze. not sure where this house is, but if it freezes, and water is sealed in the wall by using flex seal, there are going to be problems created over time that were never before seen

[@Nalleman79]

This i would not recommend doing. Paint with a diffusion open paint instead. This will destroy your walls.

[@Thomas-ge1pt]

I have an old coal chute that was sealed up with concrete. With heavy rains, water seeps thru the ceiling section. Would this be a good solution for this?

[@scotts1356]

If you dig out the outside and seal it, there's no reason to do the inside!

[@GodofWarNJ1991]

How fast does the flex seal harden ? And what stops it from hardening in the bucket once I open it and pour some into my paint pan ?

[@PowerOfValmet]

Always let youre walls breath in a basement 😟😟😟

[@jvalentin679]

is this good to use on garage walls? inside and outside? cinderblocks? concrete? plywood?

[@jamespinckard4210]

....and look how much better the lighting is.

[@zickmcdougall4960]

Does it smell strong? I gotta whole basement that would need this. So it’s not good on the floor?

[@Da_Boss64]

Curios why you didn’t dig down to the footing of the foundation. I’m have a problem with a small leak my basement goes down about 8 ft below ground level. Regardless great video and this just makes me more confident flex seal will work.

[@mohamedelzubeir2718]

Great work. Now you just need to paint the basement ceiling. I think black would look awesome!

[@FrigidFrosty]

Yes putting on with roller is great

[@motorcyclehair]

6:02 "It's a' RAININ' Paint!" Why does cleaning make something look/feel so much easier to fix/repair/improve. I like the cleaning process-but only with handy stuff.

[@maryprochilo4498]

What do you recommend for sealing and painting the floor?

[@dragosbonica4697]

Would you recommend using this as a garage concrete floor sealer where it would be exposed to tire traffic?