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

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.

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.

Much better to treat the car now than deal with rust and holes later. The product is affordable and easy to apply. Overall a simple and effective way to protect the underbody

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

Woolwax itself is amazing, I've used CRC and PB Blaster, Woolwax is my favorite hands down. The 24" extension tube is junk though, idk if mine came broken or broke literally just putting it on the can, but it resulted in leaking half the can of Woolwax. Still worked and I was able to get in the frame, but pretty disappointing. Giving it 3/5 stars since most people probably buy this bundle for the extension sprayer and it really seems like junk.

I had woolwax undercoating professionally applied over a year ago and I purchased this product to touch up the initial coating I had done previously. The aerosol cans are perfect for spraying and touching up certain areas. I ended up having enough with the cans that came with the purchase to apply an entire 2nd coat altogether over the original coat of woolwax that was done last year. I have a Toyota Tacoma so if you have a larger truck you would probably need more than 3 cans especially if there was no undercoating applied to begin with and everything was bare steel from factory.