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Your cart is empty.Permatex Undercoating protects fenders, frames, fuel tanks, door panels, rocker panels, hoods and firewalls against moisture, road salt and corrosion. Body shop proven, this undercoating won’t sag or drip and will sound-proof and insulate. Permatex carries a wide selection of undercoating and rust products for auto body along with weatherstrip, trim, headliner and carpet adhesives for interior and trim repairs.
Jado
2025-08-31 18:36:45
This stuff is great. Coated my frame on truck sat through a winter in my yard not tarped and exposed. Not a blemish. It is a little messy so wear gloves. And be careful not to toss case around as on can was exploded, I assume from the shipping by FedEx. All in all great buy.
Casey Connolly
2025-08-26 17:16:49
DONT BUY THIS!!! I have a business undercoating vehicles and have tried nearly every brand. I bought a 12 pack of this not realizing how bad it could possibly be. I have never used a product so bad. I shook for 5 minutes and it still comes out in clumps and it drips everywhere. It makes a mess and looks horrible on the car. If you want good undercoating buy 3M brand.
sadbuyer99
2025-08-06 14:39:25
Great price and it's hard to find non-rubberized undercoating anymore. The rubberized stuff never adheres well and just flakes off after awhile. This is more like road tar and likewise nothings going to rust underneath it.
MR STEVE
2025-08-05 12:10:45
Good stuff! Dries very slow. Long cure time needed before it is hard. I would say 72 hours plus. This would be for a hard cure in mild weather.Cool weather may need a full week.Shake can after use and turn upside down spray and clean out cap or nozzle. If not it will seal off hard and never spray again.This product works very well.
Flyer
2025-07-24 11:07:25
This is a super product. I make flatbeds and trailers with steel decks and they always fail from rust underneath (paint chips, space between cross members and plates packs with dirt from tires and rusts, etc.) .Rusting takes years but this stuff seals much better than paint. It goes on quickly (wide spray) and some what seals joints. It takes several cans to cover the bottom of a flatbed, but is worth it.
smokintn
2025-07-16 18:31:36
This product is used for sealing under cars or turcks,not bad for the money I payed for it,could not get it cheaper at parts store by fair...Make sure you lay something on the drive before shooting it,always Glenn.
JUDY D.
2025-07-13 17:30:47
It is gloppy and has uncontrollable spray. I have used other brands and did not have this problem. Thought i had one bad can but tried a second with same issues. Very hard to use. Extremely messy do not recommend this product. This product is considered hazardous so cannot be returned through amazon. I have contacted the manufacturer and still have not heard back from them.
Adam
2025-07-08 17:04:12
I've ordered these 3 times, used it on my truck, car, and boat. It's messy and if you don't apply it right you do get runs. But with the right amount of finesse you can get a clean finish.
Jado
2025-06-25 15:01:02
This stuff is great. Coated my frame on truck sat through a winter in my yard not tarped and exposed. Not a blemish. It is a little messy so wear gloves. And be careful not to toss case around as on can was exploded, I assume from the shipping by FedEx. All in all great buy.
Casey Connolly
2025-06-12 15:58:17
DONT BUY THIS!!! I have a business undercoating vehicles and have tried nearly every brand. I bought a 12 pack of this not realizing how bad it could possibly be. I have never used a product so bad. I shook for 5 minutes and it still comes out in clumps and it drips everywhere. It makes a mess and looks horrible on the car. If you want good undercoating buy 3M brand.
sadbuyer99
2025-05-20 14:23:24
Great price and it's hard to find non-rubberized undercoating anymore. The rubberized stuff never adheres well and just flakes off after awhile. This is more like road tar and likewise nothings going to rust underneath it.
MR STEVE
2025-04-29 13:08:41
Good stuff! Dries very slow. Long cure time needed before it is hard. I would say 72 hours plus. This would be for a hard cure in mild weather.Cool weather may need a full week.Shake can after use and turn upside down spray and clean out cap or nozzle. If not it will seal off hard and never spray again.This product works very well.
Flyer
2025-04-07 15:02:19
This is a super product. I make flatbeds and trailers with steel decks and they always fail from rust underneath (paint chips, space between cross members and plates packs with dirt from tires and rusts, etc.) .Rusting takes years but this stuff seals much better than paint. It goes on quickly (wide spray) and some what seals joints. It takes several cans to cover the bottom of a flatbed, but is worth it.
smokintn
2025-04-04 14:21:57
This product is used for sealing under cars or turcks,not bad for the money I payed for it,could not get it cheaper at parts store by fair...Make sure you lay something on the drive before shooting it,always Glenn.
JUDY D.
2025-03-11 14:42:42
It is gloppy and has uncontrollable spray. I have used other brands and did not have this problem. Thought i had one bad can but tried a second with same issues. Very hard to use. Extremely messy do not recommend this product. This product is considered hazardous so cannot be returned through amazon. I have contacted the manufacturer and still have not heard back from them.
Adam
2025-01-20 13:00:08
I've ordered these 3 times, used it on my truck, car, and boat. It's messy and if you don't apply it right you do get runs. But with the right amount of finesse you can get a clean finish.
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