Corrosion experts agree that the best test to prove the effectiveness of a rust inhibitor is the test of time. Rust Check has been Time Tested and Proven since 1973. Rust Check is a specialty formulated blend of chemical rust inhibitors that creep into the tightest seams, bonding to metal and dispelling moisture - the number one cause of corrosion. Rust Check can even be applied to older vehicles as it can penetrate rust and hairline cracks in old tars or sealants, to protect the metal underneath. Rust Check is also excellent residual lubricant that coats and protects electrical connections and power accessories. more... See more text