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🛠️ Protect your ride like a pro — rust doesn’t stand a chance!
Fluid Film Undercoating Protection is a premium lanolin-based rust inhibitor and lubricant designed for long-lasting corrosion defense on all metals. Its thixotropic gel formula penetrates tight seams and resists harsh marine and winter conditions, providing a non-toxic, non-flammable barrier that keeps vehicle chassis and parts protected while restoring a rich black finish. Widely trusted across automotive, aviation, and industrial sectors, it salvages corroded parts and ensures smooth operation without trapping moisture.
| ASIN | B08MV9615R |
| Best Sellers Rank | #21,804 in Automotive ( See Top 100 in Automotive ) #88 in Care Corrosion & Rust Inhibitors |
| Brand | Fluid Film |
| Customer Reviews | 4.7 4.7 out of 5 stars (197) |
| Date First Available | June 7, 2018 |
| Item Weight | 7.68 pounds |
| Item model number | CNASB |
| Manufacturer | Fluid Film |
| Manufacturer Part Number | CNASB |
| Package Dimensions | 7.76 x 7.09 x 6.97 inches |
R**E
Best product we have ever used
Great product. Undercoat the entire bottom of our f250 Ford Great protection for our truck.
M**M
Cheap insurance against rust
I’ve been using fluid film for about 6-8 years now. I undercoat my truck every other winter. Fluid Film is better than undercoating and easy to apply. It won’t harden like undercoating so it doesn’t trap in moisture. It will wash off but on in the wheel well areas. Under the truck and along the frame it stays on for years. One gallon is more than enough to coat my truck. The only con with FF is it smells like manure. That will last a week to 10 days. It’s worth it to save your vehicle from rust!
J**.
Great way to fight salt covered roadways
I put this on my truck 4 years ago ago when I bought it and it works great as a protectent
B**3
Very Nice.
Worked fantastic on my truck with the fluid film spray gun. Worth the money. Will purchase again.
C**A
Very black
Works amazing
N**E
Flights rust
Use to use the original fluid film but tried the black, works just as good and love the black. A must to fight the rust
A**X
Makes the underside of your vehicle look new, keeps rust away
Awesome stuff, use it every year prior to winter
M**A
Great under coating and more
Great product for black metal parts. The clear is great for all parts. Leaves a oily coating makes cleaning 4x4 mudding toys easier.
R**N
Can be brushed on
Great stuff I put it on with a brush
B**.
Great stuff
Very good product, sprays on nice and thick, we will see what it looks like after winter
B**S
Bon produit!
J' ai fait le travail avec un pulvérisateur pour produits antirouille. J' ai ajuster la pression à 80 lbs. Se shoote super bien. Avec un gallon, j' ai fait mon Ford Ranger au complet, il reste 1/10 du gallon. Bien satisfait. Merci
I**N
GOOD stuff
Good stuff
W**R
Great product
Great product
Trustpilot
3 weeks ago
1 month ago