FLEX SEAL to Waterproof a Tile Shower???

Flex Seal is advertised on TV as a fix all for leaks and waterproofing applications. In one commercial, Flex Seal is used to waterproof a screen door and to seal the bottom of a boat. So naturally, I want to find out if Flex Seal will work to waterproof a tiled shower and if flex seal can be used in lieu of a PVC pan liner, Red Guard, or Schluter Kerdi waterproofing. Flex seal bonds to common building substrates such as plywood, drywall, PVC and more. So I figured it would work in a tile shower construction application. But before I use it on an actual job, I made this video to show how it holds up in testing. Can it withstand a 14 day flood test? Will thinset mortar bond to it? Is it practical to use it as waterproofing for a tiled shower? Watch the video and find out!
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[@FlexSeal]

👏Job👏Well👏Done!👏 Flextastic work demonstrating the awesome capabilities of Flex Paste and Flex Seal Liquid. You're a true Flexpert! 💪🔛

[@Randy_84]

Holy shit.. this is a real account?! 😂😂

[@edisonorellana3515]

Awesome demonstration. Is this KZbinr gonna get a complimentary monthly load of flex seal products? That would be great . He did an awesome job

[@MrMdemon]

How well does your flex paste hold up to water? How long would it last in a shower floor application?

[@anonymousrenner5570]

Flex seal needs to finance a complete shower job for the tile coach to demonstrate the awesome comparison to traditional applications to waterproofing. Turn that into a commercial no more boats made of chicken wire. come on Flex seal. indorse this guy plz.

[@JulesHunterHillBigSkyBeauty]

My MAIN Flex!! Do thoust feel my love for 'thoust' products from afar? For thine cupeths DO runneth OVER!....with stockpiles of all things Flex! But HELL YA yall should hook this fella UP! He certainly deserves it but I would LOVE to see him build a tiled shower; start to finish with my beloved Flex!

[@victorgordillo6024]

I have used flex on a niche and a shower sit no problems been 10 years still good

[@leer5888]

What did you use for thinset

[@islandaloha]

Flex Seal is awesome! It can save your day. While everything failed, I used flex seal to fix my shower leak without tearing my shower apart. It worked! My cost is one can of flex paste for $14 that saved my leaking shower. My shower is 60 years old and the waterproof lining has disintegrated and water has seeped through the dry pack, hardy back, dry wall and into my closet behind the shower. Flex seal does the job. It bonds to multiple materials than anything else and this is the first thing I know that can be applied directly to wet surface. I love it.

[@willcochrane9854]

Haha I would never use this on a customer's house but you've got me seriously thinking about doing it on my own bathroom remodel.

[@natemartinez4595]

Seconded. Doing my master shower now. I donno if I trust it for the pan, but itd save time on the walls

[@johnnyb7200]

I used Flex seal on my own shower and it worked like a champ! Water proofed my shower using all Laticrete products, wall board, sheet membrane, Hydro Ban and Laticrete sealer. The Flex seal worked better than the Hydro Ban and dried faster under the sheet membrane!

[@JulesHunterHillBigSkyBeauty]

@@natemartinez4595 You would if you bought a pint and saw for yourself. This product is OUTSTANDING. And it comes in clear, white and Grey as well.

[@Userxyz-z2d]

@@johnnyb7200 good to know👍

[@lillithjones993]

Yes! I would like for you to tile a shower with using Flex Seal! It would be great if it was sponsored by Flex Seal! Then check on it after 15 years. My tiled shower was built in a house having a crawl space. Due to too much deflection or the house settling the tiles cracked causing a leak that rotted the wood subfloor under the pan liner. I don’t think the pan liner was attached high enough around the edges of the shower nor was there a membrane on the subfloor. So, the shower failed after 16 years.

[@andrewk-majordochomerepair6014]

Great investigative strategy and hypothesis testing. As others have questioned as well it's not only how durable are these products over time but also the impact of moisture and mold development.

[@matthewdefer8215]

Keep the videos coming!! I’m a contractor from Arizona and love working with tile. I enjoy your content so much and I always learn something. Thanks so much Isaac!!

[@wasntme3651]

The first thing I thought was thin set wouldn’t bond to Flex Seal. Good video 👍🏼

[@richardwright4112]

I've actually used it to waterproof a niche that had started to fail. It worked great

[@leer5888]

What did you use for thinset

[@richardprescott9704]

I like to see a comparison of the flex seal bond to substrate vs Red Guard/Aqua Defense! 😁

[@benjaminziegler7437]

Id like to see that same tensile strength test after the flex mockup and standard mockup have both been submerged in water for a certain period of time, in order to see how the flex paste handles being submerged in water

[@nevinkuser9892]

Now that's a good idea!

[@jonw1531]

I'd like to see the additional step of grouting. Would the chemical difference between flex paste and regular cement based grout cause cracking problems?

[@A.Martin]

can probably grout it with the flex paste :P

[@speway]

@@A.Martin Depends on the thermal expansion properties.

[@cynthiaayers7696]

My question is, if used for grouting, how's the finish cleanup. I imagine it might be a little messy/ sticky..? But I suppose with the right applicator and a steady hand, thing's can be kept down to the bare minimum.

[@dieptran3776]

I&Nhat chy juice i

[@dieptran3776]

G c g x ‘ nay mm. Nuht

[@gary7vn]

First class analysis. I am repairing a bathtub wall that has plywood under the destroyed cheapo plastic liner and have been looking for an inexpensive, relatively easy to do solution. This looks like a good solution for me and having seen this vid I can proceed with confidence. I was thinking about putting primer on the flexseal and using stick on tiles, but I think that regular tiles using this method would work great and be less expensive than using stick on tiles. Thanks!

[@chrislewis6574]

👍 Would be great to see this tried in an actual application with periodic updates on how the performance is standing up over time

[@eltonnoway7864]

He did. Check out: kzbin.info/www/bejne/nqXGeGuGZb2Yg9E. Then he went back and reviewed the job 8 months later: kzbin.info/www/bejne/n4qTl4eCgKuWiq8

[@mattjudy6780]

Was waiting for this video! Seems like it works as a waterproofing application. I'd be concerned with how the flex seal paste you used to bond the tile would hold up in a wet area. I think that would be another great test. Hopefully it doesn't react like mastic does to water. Wouldn't want to be the first to try this in a customer's shower though lol

[@planetclay]

why don't just use a good quality thinset? in a future video he says this stuff mad him feel ill. he should have but didn't mention that here. and no don't do this on a professional installation.

[@jasond.606]

I didn't scroll through all of the comments , but from what I read so far , I didn't see any questions about sanded or non-sanded " grout " adhering to the flex paste . So , that would be a good test and also a test to see how the flex paste holds up under water . What you have shown me so far and one personal trial run leaves me confident enough to use the flex seal liquid and the paste on my 2 up-coming bathroom jobs in my home . I have used the flex seal liquid on my metal roof to seal 2 seams and to seal around 2 vents trying to fix a " bad " leak . Since sealing those things , we have had several down pours and no more water penetration . Couldn't tell you which area was the culprit , but which ever one it was is sealed now .

[@danl4222]

I congratulate you on a really great video. You are the smartest Tile guy I've ever seen!. coincidentally I stumbled upon you as I was trying to solve a mystery leak in my pal's tile shower. once I had the drain removed I could see the person who put the shower in was not a subscriber to a membrane, or related weep holes. The drain was unusual in that it was a cone shaped beginning at the bottom of the lip. There was plenty of room for water to get in there around the edge of that lip, The lip didn't overlap the tile, and because it was a lip there was no gasket underneath any water entering that little (1/8 inch) gap when straight down to the weep holes, & three bolt holes on the same plate. To route leaching water into the weep holes, but to keep the edge dry I bought a 3" toilet gasket and cut off all but 3/8 inch. Then made a bevel when the cone touched. Flex sealed it around the outside circumference & also the top where the cone would touch. It worked !! now weep holes only get wicking water .. while the flex sealed gasket won't let any "above the tile" water in. Youre videos are A-1 . Thanks for teaching me.

[@michellehurt4851]

Awesome I'm fixing to repair my mother in laws tile shower pan I definitely want to see more coach

[@szilardkiglics711]

Very unusual and very convincing that it works well the only thing you might try is to soak the flex seal application under water for an extended period. Awesome work Issach.

[@IzzoCello]

I wish I had a shower at my shop. I would totally try this. Thanks for the experiments.

[@mainewoods1862]

I could never do one for a customer or for myself. Thank you for you coaching and your work.

[@albertdimaggio584]

I would totally use it if you did first with another one of your extremely helpful videos on an actual shower installation. Thanks for all your videos I've been in the trade for 30+ years and still pick up helpful tips from your videos

[@kennethwallace5168]

I guess you have to trust it...you tested it. Great video. Thanks for your video quality. I'm hard of hearing and every word was audible. And your editing is superb!

[@MAGAMAN]

The real question is how does this stuff hold up over time. I would love to see how well this stuff would hold up in a shower. It would be interesting to see how things like cleanup work compared to regular mortar. People like to make fun of the As Seen On TV stuff, but some of their products are very good. The biggest problem with some of their products are the terrible commercials and the lack of need of some of them. I absolutely love my Ove-Glove in fact, I liked the first so much that I bought another one. I never have to worry about bumping my hands or wrist on a hot oven rack again.

[@typhan1647]

I used this stuff in my float center. I seal up the bottom of my float tank. The flex seal is exposed to salt water and lots of shower water all day every day. I use this in place of caulking. Let me tell you it is legit. It has held up for 2 + years without needed to be replaced. I touch it up once in a while when a chunk gets dislodged from mopping. This stuff works wonders no doubt and I will vouge for it hands down.

[@joshuaallen5453]

@@typhan1647 2yrs. Isn't long enough. It needs to hold up in daily showers for 10+ yrs. Do u think it would?

[@typhan1647]

@@joshuaallen5453 sooo 7,200 showers over two years isn't good enough?? bahahaha, ok. it far surpasses any caulk or silicon on the market

[@joshuaallen5453]

@@typhan1647 I agree...I know the flex seal will hold up no doubt. Its def. A water sealer of tge best kind. I was speaking more than about the materials attached to it.

[@planetclay]

he says in a subsequent video that this stuff made him feel ill/light-headed....goes so far as to say not to use this IN peoples' homes. he should've removed this video a long time ago....and just left the update.

[@davemetzler1]

I have used ShowerKote from Kote Products. 5 years and no damp or leaks from shower at all. Also it is totally transparent, so you can coat over tiles without spoiling the aesthetics.

[@crazsilversc2884]

I used the flex seal paint to create my own tub shower surround wall. I even took a shower niche by kerdi and used the flex seal paste to cover it. Then blended the niche into the surround with combo of both.

[@jackgross6133]

I'd actually wondered itself same thing, you did the leg work, the results were as I strongly suspected, apreesh your work.

[@JulesHunterHillBigSkyBeauty]

This is BRILLIANTLY exactly what I've been pondering on while planning my tiled bench shower so I never EVER have to flop around in a bathtub,unable to get out after slipping...again. Except it doesn't quite get to MY specific pondering. I knew Flex would work. I'm OBSESSED with most Flex Seal products and hit sales and resale sites for deals, as a daily troll! I have a literal stockpile of different Flex sheeet. Anywho.....I was HOPING to see if it was cost effective. I know this product is not cheap but I've yet to begin pricing out needed product list, therefor, am unaware how it stacks in that department. So I'd LOVE to see you do an entire job with it!! PLEASE!! Maybe even a sidexside price match of Flex and the comparative product you'd use OTHERWISE. Good works here! Again!! You've helped a lupus addled 52 yr old woman get quite a few diy projects done RIGHT. Onto the next! A tiled sit-down shower so I can STOP taking 3 hr long 'showers', while sitting on edge of tub. Washing a load of sopping towels every other day. Because my dad taught me at a young age. When it came to destruction of what you've worked your fingers to the bones for... Fear water.

[@AC-yf8hu]

Flexseal is nearly double the cost of redguard. A gallon of flex seal is $89-$99 and a gallong of Redguard is $60. Flexseal advertises up to 150 sq ft of coverage from a gallon, and RG 110 sq ft.

[@royguerrero6929]

I actually did one 4 weeks ago and haven’t had any issues so far. Wish I could add pictures to the comments to send. Came out really well!!!

[@Investigativebean]

Yes sir! We have used the flex seal paste in white to seal our above ground pool skimmer…with it actively leaking. It took a light sanding, and two coats. The clear spray saved my basement from flooding when the pointing in the brick beneath the door failed to prevent water that would accumulate any time the French drain had something blow into it.

[@AkSonya1010]

I love how you geek out on your projects. So awesome :-) great job, I bet Flex Seal appreciates it.

[@maheadros]

Man, I’d love to see you use this on a real job. I don’t think I’d personally feel comfortable using it on a customers job, until I’d lived with a shower done like this in my house for a while…

[@JoseAlvarado-hq6vl]

Yes I will feel very confident that this is a very good product as red gard , thanks for your videos and your time to teaching as

[@harrismohammad5009]

I will use it but in my masterbath first before using at jobsite. Also, cost is another deciding factor. Thanks for all your education.

[@aal25598]

Yes, please apply this methodology on the next job site! Can't wait...

[@xuser9980]

My roofer told me that there are more and more guys in his trade that think highly of Flex Seal and its usages. I can't think of a more unforgiving application than a rooftop.

[@billysyms5761]

That Flex Tape is no joke! You can apply it to the bottom of a cracked fiberglass tub and it will stop the leak 100%. Customer can use the fixture until I can get out there to repair. A month later it's a job to pull it off. A real tile guy knows all this Red Guard, ect and boarding up showers is a joke anyway, Flex Seal couldn't do any worse IMO.

[@jwil4905]

@@billysyms5761 Red Guard works just fine as long as you apply it properly. Red Guard over concrete backer board is bullet proof.

[@jasonmmartin6807]

I see others have asked about the price comparison to the products you use regularly and I would think it would run a but higher then normal at 90 dollars a gallon unless you can get a contractor discount. Also the snell is crazy and in a small area I believe it would be overwhelming. Also the work time of the product is very short from my experience with it but I definitely would love to see it done and I love the product and have used it around basement windows pipes running through walls and many other places. You do a wonderful job on your videos I was born into the masonry trade began at 8 years old dragging 8 inch block but still trying to master tile just a different animal all together yet very similar to cultured stone applications in some ways. Keep up the good work.

[@brendanicholas7813]

Happy to see video. I had planned on fixing the cracked shower base using fiber glass cloth and resin. Then topping it with flex seal to hold the tile. Really appreciate the video. Thanks again, Leo

[@blaster-zy7xx]

I would try it in my own shower. One thing I used Flex seal for is sealing over a water stained drywall ceiling. After fixing the actual leak, the remaining water stain will bleed through several coats of normal ceiling paint. By spraying on some flex seal on the water stain before painting, the water stain no longer bleeds through.

[@Braderlinger]

You can also use oil based kilz in a spray can it seals the stain and you can paint over it and the stain doesn’t bleed through

[@thompsonhandymanservices6088]

Using ANYTHING that works well comes down to cost. Is the cost of the flex seal more costly than the other water proofing material (say Red guard or something else) ?.

[@WilliamWagner1]

I think 1 gallon of flex seal might be a little cheaper than 1 gallon of redgard. But the flex paste is most definitely more expensive than thinset.

[@jetripp]

Thank you! Very informative. I really think you have the most informative support channel out there. Well done Tile Coach!!

[@RBryant747]

First and foremost thanks for the video. In my company as a automotive and aircraft detailing service I am always looking for products to enhance what I do. What I have found not all manufactured products are all that great. The problem is that's what's out there and that's what we have to use sometimes. But as you have shown in this video when you go outside the box and you find other products that can do a far superior job why not use. As in your test you can clearly see the fail point was not the products that you were actually testing it was the actual backerboard the weakest link. I guess the only way you can truly tell how strong is is put a piece of steel behind it and then see how much tensile strength it has. Again awesome video.

[@eccrusr]

I've been watching all the flex seal commercials and have used some of their aerosol products. I would try it on a home project first and am pretty confident it would hold up in a tiled shower application.

[@unifiltered6840]

If you use it on a customer’s home then I will be convinced, I trust your skill set and knowledge.

[@joshuabetts2947]

I have used flex seal to stop leaks in a boats and I have seen it on roofs also. It seems over time it will break bond and flake away from having water on it, off and on. Using it in a shower would worry me due to the prolonged use of the shower with heat and cold. If it was a lake cottage or a vacation home that only gets used a couple times a year I would feel comfortable. It would be a fun video though. Cheers man!

[@williequintero873]

I think I would use it on my own shower first, it's a great idea i'm always looking for products that really work... thank you for making your videos!

[@tonyp9609]

Great video. Try mixing into or dusting the Flex-Seal with fine bed sand and I believe that the thin set will stick. Thank You

[@ImTurtleSmo]

AMAZING video! ! I'd like to see the result of it being used on an acutal job in home climates where expansion and contraction happens through the seasons.

[@francischacko5627]

I really love to see you use the product on a actual job. Thx and good luck.

[@milesharlan1]

Love the video!! I think you should build a mock up shower & run the mock up with a hot & cold water!! Make the mock just like a real shower..I would love to see you build the mock up & test the mock up..The only thing I would not be sure about is how long( time wise, months or weeks) to test the shower 3 to 4 times a day. Isaac keep up the good work & see you in your next video.

[@edwardmanning9290]

My question is how easy is it to get out of the grout joints once it's cured???

[@jack_brooks]

I'd worry about how it ages. For example, if starts to crack in 5 years that's no good.

[@Titantitan001]

Yeah I feel like there would have to be actual testing done. Not some in shop mini trials.

[@waynehead4902]

Mortar cracks quicker than that.

[@CP-lo2bh]

I was thinking the exact same thing.

[@jack_brooks]

@@waynehead4902 Mortar is not considered a waterproofing agent. This would be in place of Red Guard or a hot mop install.

[@mommytweety7157]

Shrinking maybe too?

[@tu1469]

This is a revolutionary tile video tbh. It could become the new norm

[@thegrimreaper7777]

Either get Flex Seal to sponsor a shower install (put their money where their mouth is and if it fails before it's due they pay for replacement) or try and persuade Home RenoVision DIY to do it instead, they'll use anything.

[@Crispyyy7]

'perfect everytime!'

[@DrKwaZMD]

👏🏼👏🏼👏🏼

[@michaeltammaro482]

Jeff is OUTSTANDING. I don't know YOU but I'd still bet HIS experience compared to YOURS or many TODAY there really isn't much comparison. You say HE'LL use anything as if he were a gypsy.

[@leonardsmith82]

That would be the response we are really hoping for 😅

[@nathanburbach1838]

I would be concerned of “flex”ing under the tile and having issues with cracking tiles. The point of cementitious products is to properly support the tiles.

[@HomeImProveMentHow]

@@Trucker-Belly; How's it going yeah I would definitely think both flex seal products would work just fine the only problem it's not cost effective I'll do things you could use.

[@ryanodonnell1892]

Whoa! I would definately try this on my own shower project! If that worked well over say a year I would talk to a customer and discribe the install to see what they thought. If I had confidence in this method and the client was down, I give it a shot. I am curious about how grout would set between tiles and if so what grout would hold up the best.

[@spudzooka]

I have used flex seal on cracked commercial drainlines where the cost to repair correctly would have been astronomical due to bad access. 5 years later the repairs I made are still water tight and super well adhered. Flex seal would be a great solution for a pan that needs to hold water because it is a less likely to have issues in corners and seams (the areas all current waterproofing techniques struggle unless perfectly installed) because it doesn't have a tendency to crack when drying. the issue is the inability to use thinset means it is a pricey install.

[@ronaldnoble2729]

Yes I would like to see it on a regular every day shower and see how it stands

[@tedmcnair9709]

I think this is a great product to try on curbs! Gotta believe it would hold up well!

[@AnotherOCD]

Phenomenal man! Thank you for doing this kind of testing - have always wondered about "alternative" products like this!

[@DianaTx63Favs]

I would use the flexSeal for a shower remodel and I was pleased with your video test.

[@mctrucker9910]

I'm interested in seeing this played out in an actual install.👍👍

[@jonathonvanover8278]

We’re doing my father in laws shower this week and using the Flex Seal & Flex Paste. Pre-slope is done so here we go!

[@lonestarhero81]

I would have liked to see the tile bonded with Flexseal submerged in water to see how well it holds up. Another product you may consider testing is Liquid Nails heavy duty, under $4 at Wal-Mart. It has waterproofing properties, I'm using it to seal and bond the cement board joints and screw holes. I'm still using the mesh tape on the joints and waterproofing the entire cement board with RedGuard.

[@gardenforfun]

Yes I'd use the flex seal. Your test was very impressive. Thx

[@kengland88]

For me, if the Flex Seal + Flex Paste method works equally as well as the usual tiling methods do, then it would depend on which method is more cost-effective.

[@alfa0mega74]

but flex is total water proof

[@charleshoyt8907]

I would absolutely use Flex Seal after watching your testing.

[@joethecreative1754]

Awesome video I’m going to use it on a shower build along with waterproofing the boiler room in the basement thanks for the great click keep them coming!

[@reiter650]

I have so many questions about this!!! I’d let you try this on my shower! I’m in the building stage of my shower and after watching so many of your “fail” videos I’m skeptical to install the kerdi system as per instruction. Seems like there should be a better way to waterproof a shower in this day and age. Not saying FlexSeal is the answer but there must be a better way. Lol! Thanks for all the great content

[@TexasP00nTappa]

I'd be interested in pressure testing over time with all of the walking on and off.

[@MrTooTechnical]

OH MY GOD. YOU MADE MY YEAR. THANKS SO MUCH. MEGALITE FOR LIFE BABY. AND YES, PLEASE MAKE A REAL SHOWER WITH FLEXSEAL. WOOHOO

[@joecliffordson]

Looks stronger than anything I have seen you tear apart. I would give it a try if the customer was down for a test with the caveat that I would fix it if it failed. I might even use it in my body shop instead of seam sealer after watching this.

[@ginamoore767]

I had a soap dish come down in my shower, along with a couple of tiles. I was searching the internet to see what I could use to put it back up and saw your video. I am recently widowed and am on a fixed income, so I was thinking I would buy flex seal to fix it. My husband was a master electrician & plumber & always fixed everything around the house, but since he is gone, I have to step up to the plate, and learn how to do these things myself. Which flex seal products would you use to fix this little job? The caulk is white BTW.

[@RC11759]

Why not try it if it works it might be of great benefit. Only question I have how good will it do against mold or mildew. Great test.

[@mooosestang]

How well is grout going to stick to the flex paste?

[@Bennysol]

Good question

[@YourPledge]

I will be using it on my current venture........ Great work! Thank you

[@TheJohnyblalack]

Sounds great but I purchased flex seal which is not cheap, it is $100 for a gallon, I don't know how much the paste cost but the other question is which grout would be appropriate for this situation... would it take conventual grout or possibly epoxy grout. Will the flex seal contribute to mold? I think some more control tests would be great like you've already done but these just could be walkways in front/back of your shop and just a way to let the elements really put the test to them. I'd like to see a shower done, but I am just a little skeptical. But as they say "no risk, no reward".

[@marcleblanc7021]

I trust your test. But seems very expensive. Thanks for sharing your knowledge. Now I know definitely in small areas of repair this is a good option. Thanks

[@milodelgado5215]

Loved the Demo I have actually used flex seal in a can to seal some tough corners, but to use the flex seal products on a job is not practical to expensive .

[@peterjaszczak8017]

you should use it! It would be fun to see if you can make it economical

[@TrimJazz]

i would use flexseal in a pan application, especially in an older wood joist home. still not sold on wall application.

[@dmac1222]

We need to see how the Paste performs when submerged, don't we?

[@ppentertainment2351]

Should perform similarly to the regular pourable FlexSeal.

[@DrKwaZMD]

Good question

[@carniival1]

After seeing a test of it, honestly I'd probably try it and would love to see it tried! Could be on to something! Most likely would want to try it a fake shower or something before a customer but sometimes can jump out of comfort zone! Awesome video

[@riccochet704]

I don't know if I'd use it right now. BUT, I think it's worthy of further long term testing. It shown itself to have potential. And that's better than some other products out there.

[@terenceharper5612]

Interesting... i used this stuff for extra sealing after rust conversion on an automobile as an under- coating and removed a small square to check 2 years later that did see a lot of action moisture-wise... I have to say I was impressed.

[@asianhobbo8060]

Awesome video! Detailed testing! Thank you...You can make your next video using Flexseal at my home...

[@teezo87]

Do it in your shop and test for 1 month. Also would love a price comparison on hardie backer/thinset vs hardie backer/ flex seal/ flex paste. Good stuff coach keep it up!

[@luisalbertojimenez4995]

I think it would work and I would use it, if the price is right. Otherwise due to price restrictions I would use it. Thank you for doing all that research.

[@mr.p4293]

Looks real convincing & it looks like it’ll do the job. I would like to see you pull it off I have faith in yuh.

[@geedubb2005]

Using flex seal would be like getting married. You hope and expect it to last. If it fails, it will cost you dearly as well as be heartbreaking. One difference is that the divorce will leave you high and dry. The failed flex seal will just leave you soaked.

[@saidtheblueknight]

The same is true for ANY waterproofing method...if it fails it will cost you dearly and leave you soaked. Question is, does this last longer than other methods of waterproofing.

[@benspens]

Based on your results, I would use it on a personal shower and see it over time. Can't "guarantee" it for a customer...yet

[@Troy-McClure81]

When I was a young landscaping mason my boss use to give me a giant 5 gallon bucket of roofing tar to seal planters...some of which were 10×20 ft...wish we had flex seal that would've cut my time in half..amazing stuff

[@jasonhicks5473]

Hi Issac - pertaining to the flex seal...I think the products and your testing is superb. I would love to see you try it on an actual job. The thing that all of us craftsman have to think about and ultimately sell is the cost. Can you procure the flex paste for a reasonable cost compared to a high quality modified thin set? The jar you showed us in your demo would suggest the cost would be outlandish...I would love to know how many jars it would take and the cost to do a shower. The mortar companies give us bulk product for a low cost. The chemical companies give us a little product for high cost. That is what I have found. By the way, keep up the great work on your videos. I am a teacher and you do a superb job teaching and your style is inviting. Thanks Issac.

[@Harborman1691]

I would use it. A very nice video and very educational.

[@kenhetherington756]

Back in the 70s and 80s we had a product called Tile Tight,.....Tile Tight looked exactly like flex seal. Black, sticky and dried like rubber.------ We used it to stick the tile down in areas that needed waterproofing . It would stick to the floor and the tile, never had a problem with it sticking. ---The problem with Tile Tight was that it would run/seep to any low spot. The floor would have to be almost perfectly flat and level. We used it a little on walls. We had to flat trowel it on and stick the tile over it the next day. We used a certain bucket mastic. I don't remember which mastic, BUT, the bucket mastic we had back them was a LOT better than the stuff we have now.--Tile Tight was very hard to use, sticky, hard to clean (let it dry and scrape it off) and was like troweling cold epoxy.

[@phillipsofthedriver]

NOT on a customer's shower. Try it on the one you use every day (maybe a temp remodel so you don't annoy your spouse too much). Then tear it apart after a couple years, and report back. Even better if this shower has revealable framing on the sides/undersides so you can check on a regular basis what's going on behind the backer boards. And you gotta do another control sample shower that's used just as often for science!

[@alexandergallant6444]

Thank you for performing this test. Yes I am going to try the Flex Seal product

[@sroberds640]

Latex paint will not stick to Flex Seal either, flakes off over about a years time. The only thing I can think of at this moment is if you put too much paste down as the mortar bed and it squished up on top of the tile and you have to wipe it off with acetone, will it cause de-laminating over time since you would not be able to keep the acetone from getting down in the joints.

[@stevegatson214]

Great video....a grand slam. I am seriously considering applying to my own shower floor project.

[@4PFLikeBaby]

A superior substitute to RedGuard/Aqua Defense? Perfect for shower pans would only take a few pails of flex paste. I wouldn’t use it on walls cause you can’t use ThinSet, I just buy backer-board with a built in waterproofing membrane.

[@dhultgren1]

Liked the video. U Think that if you're an installer, it would depend on the customer's perception as well as the cost variance of FlexSeal vs other liquid products.