fluid film vs CRC / one year update

[@ShoebHussaini]

Appreciate you doing this test and sharing it with all of us.

[@lukefarmer5391]

Agreed! I used it in my outboard on a bare metal part that is not easily accessible without taking off bolted covers and I found after a year in salt water use it is still rust free and the coating is like the day I sprayed it. Crc is the way to go.

[@billyjack7421]

I use CRC as a rust protectant as it drys better, attracting no dust, almost like hairspray, works great! I use fluid film on anything needing lubrication like my car door hinges, house door hinges, etc., etc. as it lasts a long time, I’ve thrown out all my lubricants and only use fluid film for this purpose.

[@ADR69]

Love long term tests. Thanks man

[@themechanic6117]

You're welcome

[@sbond1963]

One comment. On new fresh metal, it makes sense to use the CRC. On existing metal that is rusted go with the fluid film for better penetration. CRC is not a good choice for already rusted metal because it only sits on the surface. But on a new or newer vehicle, that’s great that’s exactly what you want.

[@themechanic6117]

Yeah I can agree with that, either new metal or the rust has been ground off and you have a fresh clean layer of metal

[@FJCTRD]

Would CRC still work well on a frame that has been wire wheeled?

[@zell863]

"Ten year of using cold galvanizing compound" is my tread. Look toward the end of the thread. For me Cosmoline worked over rust.

[@CapitalWheeler]

You did it man, I'm sold. Most of us DIY guys use jack stands and don't want to live under our vics. Thanks

[@themechanic6117]

I still use it on anything that can rust on a car . Next time i come back to it , it always looks like fresh metal

[@spudth]

I'm 60 years old and care for my own cars. In 1987 I purchased a classic '69 chevy pickup (only 18 years old at the time). I wanted to preserve this truck for eternity. It had 200,000 miles on it. The owner told me that the long term owner had sprayed the undercarriage with motor oil and drove it down his dirt road. This oil dirt mixture was caked under the truck and had protected it very well. In my innate 25 year old wisdom, I had the bottom of the truck pressure washed, then completely cleaned of this mud - they had to use a chisel. I then had the truck sprayed with a "new" best ever clear rust proofing (we were still in the ziebart/rusty Jones days) the truck began rusting within a couple years. Next I tried a suggestion of "Penetrol" a paint additive. Worked okay but long term performance was lacking. I also had a few cans of CRC tool coating probably like this guy used. No long term protection. In a later job starting around 2012 we used "carwell" annually applied in October. Carwell is A very thin creeping product. Washed off in important areas. We switched to Krown which essentially is the same product with the same result. We ended up at using Fluid Film with no washing. I now have treated my 7 year old Ram dually with PFC which is similar to fluid film. PFC is from Pennsylvania based Berkebile and is lanolin based. Less odor. I currently am of the thinking that most rusting occurs in warmer weather. After the salt gets in your truck. You should not clean your undercarriage and apply the lanolin base product in spring/early summer when water will not wash it off. Then it can gather dust/dirt and build a layer. SALT DOES NOT CAUSE RUST. Oxygen causes rust. Sure, the salt and water help the chemical reaction but if you block out the oxygen with an oil you will stop the reaction. As in firefighting you take a component (heat, fuel, oxygen) you stop it .

[@t.e.1189]

Thank you so much for sharing this. It's the same conclusion I have come to after watching numerous other videos on rust prevention and undercoating. Thank you for confirming everything. I'm going to start using mostly CRC and then Fluid Film in certain situations, like the inside of the bottom of doors.

[@froggerman44]

Only thing I can say, I use fluid film, it works great. The difference is fluid film creeps as CRC does not. Which in time gets into places you did not spray. There is no one that is perfect, but any thing helps over doing nothing at all.

[@404notfound.....]

Good point 👍

[@YuriyDtv]

cr dont wash out only with gas but fluid film it washe away i ised it fluid fil on my skies and after 1 ride its gone

[@dustinworrick9173]

Watch project farm, best vehicle undercoating. He goes through it thoroughly.

[@drakelazerus]

Thank you I had someone recommend fluid film and wanted to do reviews. So far you are the second verified test/review that shows CRC to be the way to go.

[@anthonypapaleo1940]

Great stuff I went out and bought and did my fuel lines and exhaust hangers that rust as always .. thanks jon I learn things every day ..

[@themechanic6117]

Nice preventive maintenance👍

[@dutchmankamstra96]

Great information! This is the best car repair channel on KZbin!! Always look forward to your updates.

[@themechanic6117]

Thank you 👍💪 I appreciate the support

[@MrOffwithyourhead]

As someone that lives in the rust belt thank you for actual real world usage!

[@privatedata665]

My 1 year review of CRC is it worked really well and did not attract dirt . I sprayed a New Nissan truck . The one place on the truck it did not work well was in the rear wheel wells because the cinder spread on the road in the winter did remove (chipped off ) the CRC . Overall my opinoin is time to order more for the new Hyundai .

[@chrisd1328]

CRC Chemicals are top notch. If it says CRC on the label it's my preference.

[@oznetyoutube125]

Great information Thank You ..... I can see using fluid film in places where you need it to creep and CRC HDCI in places where you don't want as much creep, but want a bit more of a shell.

[@GisonLee]

Wonderful information. I use both products and the CRC stays in place and protects well. On aluminum casings , I use transparent Flex seal.

[@thecount1001]

hell yes mate, i need to do this to my truck, but it's a huge PITA! i hate getting under there, so the longer lasting the better. good common sense comment.

[@TheSterlingArcher16]

CRC is great. Last fall I sprayed some rust reformer over rusting frame welds, then hit a couple of them after with CRC. Just checked & the rust is coming back through on the welds except for the ones I sprayed with CRC. They look flawless.

[@themechanic6117]

Yes! It works great!

[@zell863]

You get lucky there because rust reformer is porous so cosmoline is managing to go in and do its job. Otherwise rr is useless. Used in past.

[@Brad-tq2pi]

Excellent video! I live up here in Ontario. Same nasty weather as you in the Windy City. Will definitely be using CRC this year before the snow starts flying. Thanks

[@themechanic6117]

Thank you for watching! I use crc almost every day

[@NoferTrunions]

Love to see CRC vs Blaster Surface Shield. BSS comes in 1 & 5 gallons, but so far, I do not believe the CRC is available - at least from their website. ALSO Transtar Amber Rustproofing 60-4023

[@richardniclas4650]

Thanks for the Information , received a notification from dealership , they want to inspect and if necessary apply crc.

[@themechanic6117]

Thats interesting

[@ashtonharvey5723]

Bruh that CRC kicks a**. I was always thinking fluid film but this crc is the sh**man. Thanks for sharing.

[@themechanic6117]

Thanks for watching

[@Really10801]

I've watched countless hours of videos comparing undercoating products... I had it narrowed down to a few products, one of which is CRC. Your video clinches it for me, there is a big difference between these 2 products, so I'm going to use CRC for my F-150. In addition to lasting longer than the lanolin products, it also appears to have a much lower risk of peeling, which is why I'm not using a rubber undercoating, frame paint, or POR-15. CRC also seems to be much less toxic to work with than some of the other products, particularly the frame paints. I bought a test can of CRC and found it was also very easy to spray inside the frame and hard to reach areas, even though it does not come with a spray tube/straw. Thanks for a super helpful video !

[@paulkaygmailcom]

it's because CRC is cosmoline based and not made from animal extracts "fluid film lanolin"

[@billiebobbienorton2556]

Thanks, looks like a good product....👍👍

[@kutunuikunikuni1301]

Yo man....just a line to say I really enjoy watching your videos. Not only for the auto repair aspect, but I view it as insight into life in your neck of the woods.....so to speak. I am a mechanic, and until recently ran a practice along parallel lines , but there the similarity ends. I have never seen or been inundated with so many wrecks and people demanding miracles as I have watching your programs ever! Hahaha...you are indeed a 'miracle worker' More likely you have more patience than I, as I'm sure I would have turfed some these vehicles along with their owners out to the kerbside long ago. Anyway, I find it fascinating and entertaining ....please keep them coming.

[@RandySForbes]

Your scientific method is so underrated. Love it! 😂

[@themechanic6117]

I tried lol

[@Utoober-yp7mf]

I also live in chicago and just had a mechanic replace the breaks on my 06 chevy uplander. the mechanic then showed me the chassis and one holding the radiator all rusted out barely holding on to the radiator. So will soon need to get rid off the van. I'm a little sad because i really like my uplander and still runs good. Now I need to rust proof my other van that is the honda odyssey. i'm going to try the CRC.

[@0713pnguyen]

Great video, very well made and really informative!

[@themechanic6117]

Thank you for the comment 👍

[@aeyb701]

My question is what do they do to protect already rusty or painted metal, not bare. I see from your demo CRC is great to use on fresh metal, which I will do for new parts like fuel filters, control arms, etc. It seems chemically to interact with the metal, versus act as a water barrier like ther oily substances.

[@ancientapparition1638]

thanks for the information, love from philly

[@BigDog50001]

Great info Jonathan! That reminds me, I’m glad I don’t live in the Chicago area anymore;)

[@themechanic6117]

😂😂🙏 lucky you ! The heat you deal with is nothing to sneeze at

[@CubasAutomotive]

Wow ... awesome test!

[@themechanic6117]

Time flies ! I forgot about it... I was surprised to see how much time has gone by and the crc still showed no signs of rusting.

[@CubasAutomotive]

@@themechanic6117 I wanted to do a similar test for myself, and someway to prolong the body of my truck. I think you helped me big-time! Gracias muchacho! 😉😁

[@kristopherhill2740]

This is awesome and i remember when you posted that. Its awesome to see you follow up. I am now gonna search for crc and use it on my rustvrolet truck.

[@themechanic6117]

Yeah its been a while, i wanted to do it at the one year more but the crc showed no signs of rust so i figured id give it more time....going on two years and it still looked the same so it was time to just put the video out 😂

[@Nando_989]

Hey so I live in Colorado where I don’t have to worry about rust. I do use fluid film but not for it’s intended purpose. I use it for tapping holes. Routing hoses in tight grommets . Electrical connectors door latches, window seals. Lug nut threads, air tool lube. Garage door rollers and chain, battery terminals. Stubborn worm gear hose clamps that bind up. Pre assembly for whee seals. And my favorite use of all, annoying tech /customer repellent.

[@themechanic6117]

Tons of uses i see lol. Yeah you definitely need fluid film around because crc is suited for every job . i tend to use the FF for key holes

[@Joseph-eh4rs]

How do you not get rust in cold climate like Colorado? Don't you guys brine the roads during winter?

[@simd510]

​@@Joseph-eh4rscolorado uses mag chloride which causes rust...

[@Joseph-eh4rs]

I'm sold with CRC. Thx for the video

[@scubadave2650]

Great video man I’ve been searching for this perfect comparison. I also live in Chicago shout out from Portage Park area.

[@themechanic6117]

Thank you . I appreciate you watching 👍💪hello neighbor

[@BlackArroToons]

Helpful comparison, thanks a lot. CRC lasts longer.

[@creepycrawler43]

Great video man love the comparison

[@themechanic6117]

Thank you

[@icicicles]

It's CRC for me from now on---THX 4 the great videos and intel.

[@themechanic6117]

I still use it everyday 👍

[@dp5383]

That storm reenactment looked real af!

[@themechanic6117]

Spielberg approved 😂👍

[@DavidGuns]

I also live in Chicago and the crap they use to coat the roads just eats metal away. I started using Fluid Flim and then switched to NH Oil Undercoating which in my opinion is either the same as CRC or maybe better, its hard to tell. Best way to find out is starting with a brand new vehicle and doing half and half then check it in one year. Plus these vehicles are not made like they once was, going just back to the 1970's the frames was solid and thin like they are now in my opinion

[@bbkmm1]

My personal experience with CRC/Cosmoline is it also traps moisture if sprayed over rust, much like Ziebart. So for chassis components, I use fluid film. Elsewhere, where the metal is really clean, no rust, Cosmoline sticks really well even after 2 years. Now, I just have to respray suspension periodically and not really worry about any other part.

[@themechanic6117]

I can definitely see crc trapping moisture since it's so good at repelling moisture

[@Winger2325]

This helped a lot excellent work Thank You for sharing!

[@themechanic6117]

You're welcome.thanks for watching

[@RwP223]

Fluid film good for large area coverage (like wheelhouse, body cavities, and the underbody plane and pinch welds). Something like CRC perfect for spot treating under carriage, cradle hardware & mounts, and suspension & steering bits, bolts and threads. I'm in Michigan and the salt destroys cars like Chicago. I did an experiment where I bed liner coated my rockers and wheel wheels on my car back in 2015, kept up with fluid film in general and spot treating the suspension, car looks great underneath to this day.

[@themechanic6117]

Nice, if you're on top of fluid film treatments it works great 👍

[@HenryTheBoilermaker3rdYear]

CRC is a great company. They did their research and testing well.

[@travispratt6327]

I think this is a great duo of products, I haven’t tried fluid film but I’m up here in New England where I’m pretty sure they sneak into cars at night and spray em with salt, crc really does work as long as you get a good thick coating on it and can reach the surface, the downside being it doesn’t creep or penetrate at all, so I think I’m going to try something like fluid film as well.

[@themechanic6117]

Yes it's a good idea to use both since one creeps into tight places and the other doesnt

[@Life_reset_]

Great video. Appreciate your work🙏

[@themechanic6117]

Thank you

[@georgebonney90]

Thank u sir👍

[@themechanic6117]

You're welcome

[@charliedee9276]

I use both. FF in those areas where I cannot easily get to, inside frame rails etc. I use CRC everywhere else on the undercarriage of my Jeep. Living in Detroit I share the rust issues you do. People who don't live in the rust belt have no idea how invasive the salt spray from tires really is, it gets everywhere.

[@anthonygillesse7242]

CRC is a cosmoline type product which I think is by far superior to anything on the market, they used it for long term storage of military equipment and coated European cars being shipped across oceans. Too bad they washed it all off.

[@manofsan]

Can you apply CRC and then afterwards put fluid film on top of it? Or can you only use one of them to coat a particular surface?

[@jaytorres91]

Awesome bro, thanks for sharing !

[@themechanic6117]

You're welcome

[@dankriewald4764]

Good Job , Thank You

[@themechanic6117]

Thanks for watching

[@Chubbycat747]

I would like to recommend another experiment. Use a few coats of CRC as a primer, let dry to touch, then cover it with regular (tar) spray undercoating. I am curious if the CRC would prevent the undercoating from deteriorating and flaking. In turn, the undercoating would protect the CRC. I have done this to a section of a old wheelbarrow, but if someone up north would do this to a section of their car and see the results, that would be awesome.

[@dustinworrick9173]

Well how did the wheelbarrow come out in that section? You already did it and are asking others to do it. 🤣

[@dustinworrick9173]

Honestly tho how'd It come out?🤔

[@Really10801]

I don't think the CRC needs to be protected, it's very durable, apply a couple of coats and it's like impenetrable.... when applying to my truck, I got some on my sweatshirt, I couldn't remove it with mineral spirits, I had to rub it briskly with acetone for like 20 minutes to get it out... highly resilient.

[@yoyomin]

Completely unnecessary. Cosmoline doesn't need anything over or under it. It's tough as nail and bonds to clean metal better than anything else.

[@chrisryan8863]

Hello Would the CRC trap existing rust where the rust would still corrode under the CRC (similar to using a rubber undercoating)? Or would the CRC seap into the metal and protect it from further rusting?

[@themechanic6117]

Hopefully this video answers that question. kzbin.info/www/bejne/rXutd4Jmq7ukaZY

[@privatedata665]

Cool vid and stuff , thanks man

[@themechanic6117]

Thanks for watching

[@djambrosia]

I'm currently restoring a 72 Karmann Ghia (I like to suffer when repairing cars). It has that 70's bitumen tar crap all over the underside which to be fair has protected where it has not cracked, but getting it off has been a nightmare. My personal choice of under seal is using an epoxy based product called EM121 which you can brush on or spray. Unlike the POR15 crap it does not peel off but remains flexible, tough like the bed liner stuff and it also prevents rust from forming underneath. It's obviously not suited to anything other than body panels so everything else needs something like CRC. Once it's on nothing short of an angle grinder is getting it off.

[@themechanic6117]

Sounds like you got your hands full! I have the rear spindle on the crx covered in por15 to see how it performs... So far so good but honestly the crx hasnt seen much road time

[@djambrosia]

@@themechanic6117 I painted all the floor pans in POR15 which just peeled off in sheets a year later. And yes I did prep with marine clean and metal ready first as per the instructions. Happened to plenty of other people here in the UK also. Works great sticking over rust (and your hands especially lol) but any shiny metal and it will lift and flake off or start rusting underneath. Maybe they change the recipe for the exported stuff?

[@kenj.8897]

Great video

[@themechanic6117]

Thanks for watching

[@predsfanmyrtlebeach4542]

Project Farm and Todd also found CRC as the best product.

[@johnplate9367]

I'm from blue island Illinois. Not far from Chicago at all !

[@jasoncharles6980]

Blaster Surface shield is the best of both. Superior protection that doesn’t wash off easily. Plus you can get in 1 or 5 gallon and apply with a compressor.

[@miked6367]

Mate, awesome test. I recently just did the exact same test but for penetrol vs some rubber spray that stops leaks. I was so disappointed when they both started to get tiny rust spots still after 1 week, they did much better than the control, but i was still hoping penetrol with its massive reputation would have sealed the metal enough after 3 good coats, but nope. And i used to be a spray painter, so it was applied generously and with perfect coverage, so disappointing. I'll be buying some crc marine and testing that also. Cheers from Australia.

[@themechanic6117]

Thanks for watching. Definitely give it a try. I still use it everyday

[@gimmeagig]

I bought Surface Shield and CRC because of some youtube videos. I did not know that Surface Shield does not dry. What a mess! I will be using CRC on my truck

[@themechanic6117]

It drying is a big plus, it actually stays in place

[@paule.maurice1521]

Fluid Film should be marketed as a penetrating Oil , works slow, unlike most other penetrating oils, but outperforms them .

[@dr.emilschaffhausen4683]

Is CRC ok to spray on undercarriages that have some minor surface rust? Use a bristle brush first then spray? Worried it might trap the rust and make problems worse.

[@themechanic6117]

I can't confirm if it'll make trapped rust even worse. Maybe spray rust convertor then crc over that?

[@dr.emilschaffhausen4683]

@@themechanic6117 Thank you for the quick reply and for the video!

[@themechanic6117]

You're welcome. Thanks for watching

[@georgebuck2269]

I'm not a chemist but it keeps the oxygen and moisture out of the rust, and that's a good thing. I spray right over the rust.

[@theslimeylimey]

Good video thank you.

[@themechanic6117]

Thanks for watching

[@SuperHogwart]

one flaw with this experiment is that you demonstrated crc a clean sheet of metal. When applied to existing rust crc might further trap corrosion causing it to rot whereas fluid film can both creep and permeate porous metals including existing surface rust

[@burhanuddin7782]

Where can you buy the crc? Great video thank you brother!!!

[@themechanic6117]

I usually find it on Amazon or ebay

[@burhanuddin7782]

Thank you brother God bless 💗!!

[@CapitalWheeler]

I always knew CRC was good for electronics, now this too

[@plmkoo6772]

Thanks!!!!!

[@themechanic6117]

Thanks for watching

[@Questtt3]

Very helpful - thank you!! You mention you use Fluid Film for some things still - what in particular? Can you use CRC on electrical . . . is that why you keep Fluid Film around? Thanks.

[@themechanic6117]

Fliud film is good for gaps in panels because it creeps into tight places. The crc is great for electrical and i use it for that often

[@dan96350]

What about protecting metal that already has some rust spots? Would one of these slow it down better than the other?

[@themechanic6117]

That test is currently in progress

[@MD-eo2wy]

is the CRC safe to spray on everything like rubber and electrical connections?

[@themechanic6117]

Its made for electrical connections so yes. As far as rubber, ive seen no signs of it causing harm.

[@zaidahmed7695]

thanks for video, i want to use on air conditioners indoor outdoor copper coil pipe inside unit plz suggest, thanks again from Kuwait

[@gnawty4662]

W! Thanks bro

[@themechanic6117]

Thanks for watching

[@thetechlibrarian]

What’s that wand your using on the spray can ? Did it come with it or is it homemade

[@drincogni]

The biggest problem i come across on land is rust and rot due to urine from animals that is destroying metal and even concrete on cars wheels and poles.No one on YT seem to mention that or do videos about it but is a big problem for all.I personally found the best and easiest way to protect is rust convertors to make them change rust to a strong layer and cold zinc galvanisation.Epoxy paints is time consuming and cost.

[@QML5320]

Can you spray CRC on moving components and suspension (tie rods, cv shafts, shocks, struts, etc.)? I am thinking about coating everything I can see from underneath my car but wondering whether there are spots I need to avoid w CRC. Thx!

[@efegurel1651]

Have you seen the crc damage paint at all? I want to spray some on my cars chassis but a lot of it has factory paint.

[@themechanic6117]

Crc has been on the underbody and painted rocker panels of my car for years. I don't see any issues so far

[@efegurel1651]

@@themechanic6117 thank you for the reply

[@SilverScarletSpider]

Because CRC rust inhibitor is so much better, then in what situation would you ever want to use the less effective fluid film? Seems like CRC wins here

[@themechanic6117]

Fluid film creeps like pentrating fluid. I think its good for cavities in cars to protect from corrosion. Parts that arent exposed to the weather.

[@zell863]

@@themechanic6117 Yup in boxed frames of today pickups ff would have capability to move into cracks of paint. Cosmoline can not do it.

[@otahu26]

CRC is the Best for my Atlantic Canada Area Even Worse then the so called Rust belt. . I was always using Fluid Film Spring and Fall to keep the body on a Toyota. The CRC I was so happy to find. My 2010 Rav4 got coated with CRC and it does not wash off in the Slush and Snow. But I also use both still. There is Zero Rust under my Rav4 and Toyota's in the Area as New as 2018. Have been known to rust out completely.

[@jrm163]

Good video! One question: how did you get the straw to the CRC can? The ones I bought have no straws at all. Thanks!

[@themechanic6117]

My cans came with a straw taped to the side of the can

[@donald1792]

thanks bro!

[@themechanic6117]

Thanks for watching

[@JuskoLord247]

Nice video man! I use Fluid Film to spray inside the frames. I use Amsoil metal protector outside the frame and all over exposed undercarriage. The Amsoil metal protector which acts the same as CRC but a bit more expensive. I would want to switch to CRC but my question is it safe for rubber, plastic, paint or other components undercarriage because its impossible to avoid overspraying sometimes.

[@themechanic6117]

Ive sprayed the crc on paint, rubber, plastic (overspray) and haven't noticed any negative effects but i cant speak for long term. The product doesnt seem corrosive or aggressive on any surface its on.

[@zell863]

This is my plan to. CRC out, ff in cavities.

[@themechanic6117]

I do the same thing

[@JayyBird93]

Does Amsoil market their product safe for rubber, paint etc?

[@ShawnTRD]

I wonder if it would be good to CRC first then Fuild Film or Woolwax after.

[@themechanic6117]

You can never have too much corrosion protection

[@CHIBA280CRV]

Going to sleep Chicago , you got me sold on the CRC , NYS out ✌🏻

[@Botanifiles]

What would you say is the best rust converter product to coat inside of the frame of a car, where it's difficult to brush paint? I'm planning on coating my car with por-15, then CRC, but not sure what to use inside the frame, thanks!

[@themechanic6117]

When I spray the inner rails of my car I'm going to try to get crc in there . If not applied properly por15 can let rust form under it

[@Really10801]

I've seen numerous videos where POR-15 peeled off in large sheets, I guess because of improper cleaning or prep, but in any case, it seems much more risky to use for that reason. That's why I decided on using CRC. Also, CRC is pretty easy to spray inside the frame, the spray mists out very well and spreads.

[@MegaTapdog]

wowser, i know this is old but TY very much.

[@themechanic6117]

You're welcome

[@Bodhi7007]

Hi The Mech a nic, can you perform a similar test on Aluminum to see how FF does on corrosion protection on Al? as the new cars are aluminum body and stuff. It will be a good test. Thanks!

[@themechanic6117]

Good idea.thank you

[@65csx83]

Curious question. If you think the results would differ for aluminum, then you would have to consider each gradation of aluminum. And if that, what about different non-aluminum metal alloys?

[@georgebuck2269]

@@65csx83 I would use CRC and as the base metal is not exposed to road salt once coated it makes no difference what metal you use. As a welder and top fabricator you would always start off with anodized aluminum if possible for corrosion resistance. The anodize coating has to be ground off to TIG or Heliarc weld. Bare aluminum is as bad as steel when it comes to road salt corrosion. I would use 5052 aluminum which is easily available and easy to bend and weld. Of course stainless steel is always used as a corrosion proof metal but it's hard to drill. It's not used very much because it's very expensive (Nickel & Chromium) but if one has the money use it. It will never corrode under any condition.

[@garyzhang5099]

Amazing video, just a quick question, can I apply this product over the paint? Or it can only be applied to undercarriage?

[@themechanic6117]

I use it over paint with no problems

[@BruceLyeg]

I've never used CRC before, but after seeing your test I'll definitely give it a go. Much like where you live, we get heat, cold, rain and snow. It's usually the road salt and calcium chloride used on the roads that eats the metal.

[@themechanic6117]

It works pretty good. Just dont spray anything that gets hot because its flamable

[@mercedesbenzs600bash]

@@themechanic6117 Great to know,thanks...

[@pedrowalter]

That the one and only I use. !!!!

[@zell863]

Would you be capable to do test where is some seam like at bottom of old door. Theory is that FF creep in. I mean cut two old peace of seams and spray with Cosmoline and FF and live for 1 year. Put same question at another guy video who do rust testing to.

[@choncho1919]

Question? do you have to clean all the rust to apply any of this products or can you just pressure wash and apply, in my case will be a tacoma truck frame.

[@themechanic6117]

I'd remove any rust possible before spraying anything over it. There's no point in insulating rust. It might even get worse

[@johnd.5480]

Many of the cosmoline vendor sites tell you to remove as much rust as possible, but go on to say in the real world, it's not feasible to get to bare metal, so cosmoline still works on tightly adhered rust by encapsulating it and preventing further rust. It will sometimes creep a bit under some rust causing it to fall off. I've had to reapply in spots. Over sound rust, it does seal well and prevents further rusting. Again, I remove as much as I can but rarely can get to bare metal.

[@Eun2k]

Hey in your opinion does the CRC stop rusty metal from getting worse? I have used it underneath my cars and the jury is still out for me if it keeps already rusty metal from getting worse.

[@ghc7910]

Yo I live in Chicago too and wish I would have done this on my 2019 Honda Pilot when I bought it new is it too late to do it ? if there’s any rust underneath my suv which I don’t know if there is but I image there has to be some rust by now

[@themechanic6117]

On a 2019 id say its not too late to use these products. My car is a 2015 and i just applied these products last year

[@zell863]

Lol. My pickup is 99 and it is not to lite at my truck. In mn.

[@tedbeach4766]

What would you think about using film first and then CRC over the top of it because the film actually seeps into the metal you think that would work so you have like double protection

[@themechanic6117]

I'd use the crc first, let it cure then put the FF over it

[@Justacogg]

So much better than tar undercoating CRC allows you to still clearly see everything and work on everything as if it’s not even there that’s the biggest benefit that I can see. Obviously after you rough up that some bolts or brake lines, or whatever the case may be you reapply the product, and then reapply a product every two years or so after that and you should be fine. at least that’s my experience. It works very well. I live at 1200 feet elevation in the salt and believe me when I tell you between prime and grit and lots of salt. CRC has been put to the test in my neighborhood.

[@jeffscharpf]

Thank you for this. Do you recommend doing this on a brand new vehicle or will I void my warranty?

[@rishitarora5432]

It wont void any warranty unless you have claims for rusting itself. But I would rather protect my car then claim rust warranty.

[@rvrmitsugt61]

Is there a difference between CRC corrosion inhibitor, and CRC converter ? As I would like to buy the bigger one gallon CRC ? And awesome 😎video !

[@themechanic6117]

I've never tried the converter but id assume you paint it over rust to convert it into a paintable surface. The corrosion inhibitor stops rust from forming in the first place

[@rvrmitsugt61]

@@themechanic6117 ok cool thanks for the reply 🤙🏻👍🏻😉

[@zell863]

@@themechanic6117 Just to let you know both. I used rust converter in past, rustoleum one. Al what it do is converting top layer of rust to some black thing but rust spread below it. Completely useless thing. Actually is just at way of Cosmoline to do its job. I heard many good thing about ff actually going below rust and detaching rust from metal.

[@themechanic6117]

That's interesting. Yeah I've never had much faith in that convertor stuff... I think its a bunch of BS

[@zell863]

@@themechanic6117 Other people have bad experience to. For you bro I put rustoleum rust converter in 2009 and than bedliner (ford f250 99 8' bed). It is how it look after pulling of bedliner in 2020 www.ford-trucks.com/forums/1582350-planing-to-go-south-to-replace-bed-bumpers-etc.html Post nr12 . Every paint will just be in way of Cosmoline. I did test for it to and it is in my self standing post that you saw. Useless rust reformer is simply worst that you can put down before Cosmoline. Cosmoline need not any help. It go alone against rust.