Protect your vehicle from rust and corrosion with the WAXOYL DIY #3-21 with Hardwax 21 Large permanent corrosion prevention kit. This comprehensive kit includes everything you need to effectively treat and safeguard metal surfaces, ensuring long-lasting protection against the damaging effects of moisture, salt, and other environmental factors. The Hardwax 21 formula forms a SUPER durable, flexible coating that seals out water and contaminants, while the WAXOYL cavity treatment penetrates deep into seams, crevices, and hard-to-reach areas. Suitable for use on cars, trucks, trailers, and more, this kit is a must-have for anyone looking to extend the life of their vehicle. With easy-to-follow instructions and high-quality components, you can confidently tackle rust prevention and maintenance tasks yourself. Invest in the WAXOYL DIY #3-21 kit and keep your ride looking and performing its best for years to come I am a lifelong caroholic. When I find something truly special I share it with my friends. Waxoyl is 'by far' world's best at what they do. My grandfather once said "doing it right the first time will ALWAYS be the cheapest and fastest way you do things". I first saw Waxoyl in 2003 while inspecting a 1968 VW bus for prospective purchase. I was under this 35 year old bus looking at an unrusted undercarriage so I yelled out "how come there is no rust under here?" The second owner of the bus had brought it over from Germany. He said "the first owner said it had an undercoat job on it when it was relatively new". I asked who did it and he said "I don't know, maybe it is one of those stickers on the back of the bus". There on the back of the bus among dozens of countries and sites of interest was a faded but visible WAXOYL logo. I looked it up and found that EVERYBODY in Europe knew all about it, it just hadn't made it across the pond yet. Fast forward 16 years and I got a call from the VP of sales of Waxoyl-USA asking for my help. Turns out if you bought a new vehicle in Europe today there is a very high likelihood you would have a Waxoyl service done on it in the first two years. The dealers do them all over Europe. They also tell me that the service results in a 25% value increase vs non serviced vehicles 5 years out. Its new here in the states but it's sooo much better than any of the lanolin - solvent temporary materials that wash off when you run through a snow storm or car wash. This is WAX, not solvent, oil or paint and there NOTHING else in its class in the world PERIOD. These Germans and Swiss are pretty smart, they stand alone in this market. You will be delighted with your results! IF your buying a new vehicle in the rust belt and investing anywhere from $40,000 to $100,000 today it would be INSANE not to do this. Look under your vehicle and ask yourself if it didn't have any rust under it how much more would it be worth?