Fluid FilmBlack Non-Aerosol, Long Lasting Corrosion, Penetrant & Lubricant, Anti-Rust Coating, Protects All Metals in Marine and Undercoating in Automotive & Snow-Handling Vehicles, 1 Gallon

Fluid Film stands out as a reliable solution for rust prevention and lubrication across multiple applications. While it has some drawbacks, such as odor and cold-weather application challenges, its effectiveness and eco-friendly composition make it a favored choice among professionals and DIY enthusiasts alike.

The media could not be loaded. I purchased my first can of Fluid Film back in 2021 after purchasing a new F-150.In short, this stuff works, and works incredibly well. Sprayed using a 8 gallon harbor freight air compressor and the Kellsport Woolwax pro undercoating gun. I tend to use 1/2-3/4 of a gallon each spray.My first two applications I have done were with the original/yellow/clear Fluid film. A major benefit of that is it doesn't alter the appearance of parts very much and you can visibly see what areas may be starting to rust easier. The disadvantage is that it doesn't flow as well and is thicker out of the container, but that potentially aids in keeping it on.I spray my truck twice a year which is probably overkill (pre summer/beach driving, and pre winter/salt roads). Had I done my truck earlier the first time there wouldn't be a speck of rust to be found. Since my initial treatment, I have no seen any new areas of rust formation. I even power-wash the underside of the truck prior to treatment and still cant get the original coating off. It adheres very well.I'd say the only major downside is that dust and dirt stick to the coating and can make the underside look a little dirty, and if you go to work on your vehicle it may be a little messier than if it wasn't coated.Important information:-A respirator is absolutely necessary when spraying this stuff, goggles too. I wear a full ace 3M respirator when doing this and the overspray gets everywhere. I know it's fairly natural stuff, but it cant be good to get it in your eyes or inhale it. You can see the atomized product in my video, it gets everywhere.-Clean the underside/frame very well and make sure it is completely dry before application.-Either cover, or be prepared to clean anything you don't want what is essentially oil on. If this gets on your brakes your stopping power will be reduced.-Proper application on a Ford F-150 (Inside and out of frame, and any exposed steel) took me about 3/4 hours without prep/cleanup.-Cleanup: the overspray gets everywhere. Be prepared to cover everything or clean it up. That includes the ground under the vehicle, the outside/paint of the car, and if you do it in a shop... everything in there as well. Highly recommend outdoors on a day with low to no wind.I find it has been well worth the investment and after 2.5 years of ownership, multiple summers of beach driving, and salt sprayed roads, my frame and axle look brand new.

Great product. A little goes a long way. Easy to apply with a gun. Dries nice and even. Leaves oily residue so rust won't come back. I use it with a wand for inside rockers and cab corners.

Worked awesome!!

Can was leaking and damaged, so we didn't use this product. However, we had a professional use the same product for our undercoating and it is great! Will buy again and try to do it myself to save some money.

The cheapest i could find it anywhere. Every fall i use it on my frame and my frame looks brand new still even in northeast pa where they love to use salt on the roads

Been using this product for over 20 years and I still think it's the best rust preventer!

I live in a climate that gets lots of snow and road salt. I had my truck professionally undercoated with an oil-based product a few years ago and have meant to redo it every 1-2 years. I recently noticed some surface rust on fasteners where the prior undercoating had washed/worn away. Time to do it again.I purchased the WoolWax spray gun and Fluid Film Black coating. The combination worked very well together. The gun sprays well and Fluid Film covers evenly. The black is nice because areas that looked dull now look shiny and new. My rear axle and rear-end look great now. It has only been a few weeks, but we have had several days of rain, some light snow, and I've been on some muddy gravel roads since applying the spray. Everything still looks as good as the day I applied it.One note about odor: My truck and garage smelled like a livestock yard (manure) for 2-3 days after applying Fluid Film. I was concerned it would persist, but by day 4 the odor was not noticeable. So don't fret if the initial odor shocks your family...it goes away quickly.