Hammerite Waxoyl Rust Proofing Starter Kit Clear 2.5L with High Pressure Sprayer. Waxoyl has a unique formula that solves the problem of hidden rust once and for all. It is a thick waxy liquid, saturated with a very powerful rustkiller, it chases out moisture to form a flexible weatherproof skin that wont crack, dry or wash off in the rain. The rust-inhibiting molecules in Waxoyl cut through films of oil, grease and dirt in seconds and cling to metal surfaces, like iron filings to a magnet and unlike chemical inhibitors used in ordinary rustproofers, they stay active indefinitely. If the skin is scratched or punctured Waxoyl creeps back and reseals itself. Waxoyl gets to the root of the problem. This starter kit contains 2.5L of waxoyl, a high pressure sprayer and an extension probe.