I drive in snowy icy roads a lot!... This stuff works, and has protected my big-rig under-frame, chains, and all the other things that would have normally rusted away, in heavily sanded and salted roadways. I have used this stuff every year. I even spray it on some of my exhaust clamps and it helps them a bit too. It is NOT a permanent solution, it does eventually wear off, but it takes a long time to do so, even after pressure-washing. It also works on electrical harnesses to seal them up. I soak my truck down once a year, just before the snow with about 6 - 8 cans. It isn't cheap, but it is worth the protection.