woolwax 12 Oz Undercoating Protection Aerosol Spray Can Black 3 Pack, Rust Inhibitor and Prevention, Anti Corrosion Multi Purpose Penetrant and Lubricant, Spray Can Extension Wand Included

Sprayed this under my 90’s truck and it still looks jsut as wet and thick as it did a few weeks ago. Rain, dirt roads, and pebbles haven’t seemed to bother the coat at all. Perfect for rust proofing, easy to apply, cheap, doesn’t wipe off and sticks well, and it does not smell bad (just don’t spray the exhaust). Will buy again in a year or two to reapply

Great product. Stops rust and easy to apply. Messy, but that's to be expected.

Does its job and the little extension hose is great for getting inside the frame. It’s easily cleaned by inserting into a parts cleaner spray can nozzle and blasting it out. This stuff does not dry! I’d hesitate to use it on exposed surfaces because it would be a magnet for dust and dirt. But it’s perfect for enclosed frame and body parts. They do make a product called Hard-On 😂 that dries completely.

Expensive! But good product as expected. Complaints: cans leak at the top due to a flawed nozzle base design. It'll seap out when in use and drip everwhere. Be sure to only apply over grass, gravel, or on a backroad somewhere. DO NOT apply in a garage, driveway, or parking stall.

Very easy to apply. Good value.

This is great stuff much better than the other lanolin based rust inhibitor,that stinks. This stuff has little to no smell. I annually go over my truck and give cab corners and door bottles a good coat as well as the rockers. I've already had the cab corners replaced and some welded patches on the rockers. A full rocker job on my truck is at least $3000 so this stuff is well worth the effort and price. I also give the bed rails a good coat inside and outside. Great stuff

The product works well ,but if you plan working under your car it can be very messy. You can’t touch anything with out getting it all over you.

Used this all under my 2012 jeep wrangler and no more visible rust (had little to start). Just wear old clothes , this stuff is messy , cleans up off hands OK. Looks like no new rust and keeps undercarriage looking nice and rust free. Stuff just seems to soak into what rust there is and stops it from spreading.