3M Professional Grade Rubberized Undercoating – 16 oz Aerosol Spray, Corrosion Protection and Sound Deadening for Automotive Undercarriages, Pack of 6

I've used this to undercoat my 2014 Ram 1500. I hit the cab mounts, frame rails, under the bed, inside the wheel wells and inside the bumpers. My truck has not started to rot that I can see today (1/15/2022)I ordered this product in Jan 2022 for a new truck that I ordered and hope to receive this March. As soon as I receive the new truck my plan is to do the same as what I did to my 2014. My only hope/fear is that this stuff that I received is not old from sitting. I did rattle them all so hopefully they will perform as expected.From my previous experience with this product, it works very well and dries nicely and not sticky to the touch after a day. It also provides a small amount of sound deadening as well. I've used a couple other brands that either did not dry nicely and remained sticky, or were not easy to spray evenly like the 3M brand does. I'm satisfied this product will work well.

Put it on a crawl space cover to preserve the wood has held up well looks good easy to use took more cans than I calculated but covered pretty well

Good product I'm used for coating under my trucks (chasis,frame) takes about 12 cans to do the hole chasis I have a short bed pick up truck and depending what kind of vehicle you have good product after removing oil and rust from chasis im applied two layers of this coat and im surprising its very strong after 24hr I know 3M is a good product "note " if you use this product safety first, use a cartridge mask 3M ,glasses and gloves, very strong odor

Ran out, tried to reorder, waited two weeks, cancelled order.

More go to brand

6 cans was perfect amount to do the frame for my excursion. The cans go a long way and spread thick and evenly. A different spray nozzle would be cool. Very uncomfortable to use but get the job done. Highly recommend.

Goes on quick and easy great coverage good value and it lasts and on Amazon it is much cheaper than local auto parts stores.

I haven't found anything that's better or lasts longer, I use this stuff on all my vehicles. Of course preparation is everything, but I put this stuff on a 2010 chevy pickup truck when it was new and just now after 13 years it's not perfect but by FAR better condition than most in Wisconsin. Even my mechanic told me to keep at it because it's a keeper. I've tried cheaper stuff and it doesn't last a year. Only downside to this is it comes out pretty fast and if it's your first time using it might take you by surprise.