3M Cavity Wax Plus Aerosol Spray, 08852, 18 fl oz, Self-Healing, Corrosion Protection, Non-Hardening, Chipping, Peeling, Cracking

3M. Best of the best. Not much more to say.

This stuff is great. It's ridiculously expensive, as are the hoses for them, but it's second to none in cavity wax. It goes a long way as well. One of my cans arrived damaged, but after providing a photo it was promptly refunded, no harm no foul.

Sprays thin and works into crevices, sets up to a nice wax that does not harden or flake off. I recommend two coats a few hours apart. Works good as a surface protectant as well, stays translucent so you can see whats going on underneath it. A tip for applying: Spray it when the product is warm. Fill your sink with hot water (or boil a pan of water) and put the can in there to warm up the product. It lays down much smoother and evenly when warm.

Used for all of my vehicles after repairing body and frame rust (get the extension kit to reach all of the interior areas). Three quick coats, as 3m prescribes, provides long lasting protection.

I live in the Northeast, a body man I know said this is the only thing that works to prevent corrosion in the rocker panels and wheel wells of a pickup truck. Been using it for a few years, it appears he was correct.

I ordered this cavity wax to treat the interior surfaces of a boxed truck frame belonging to a gen3 modern Nissan Frontier. The truck has a boxed frame so I wanted to treat the interior surfaces of the frame with something to prevent rust. I also ordered the matching applicator wand set that sprays this stuff 360 degrees in voids. One can of this stuff was almost enough for a single coat for the driver and passenger sides of the frame. Four cans would enough to get the entire interior frame and the body panel voids of the truck. It dries to a waxy finish, like chap stick or lip balm. The extended spray wand reaches far inside the frame for good coverage. This stiff is pricey but worth the cost.

Great product for hard to reach areas! Shake along time before using!

This stuff works very well. flows into places that are difficult to reach. You must buy the wand kit for the ultimate job.