PB Blaster--Made in the USA. Non-Hazardous to Atmosphere. PB frees everything faster: Rust, Corrosion, sticking, squeaking (use on MICE)LOL!, displaces moisture and does not evaporate. Leaking toilet flapper valves and o-rings restores life to hardened seals. I used it for 45+ yrs in the mechanic trades, since it was called JB Blaster and smeeled better. Smells bad now to keep some from trying to get high on propellants. Trust Me, if you can't get it loose, the last resort is to cut it loose!
In 1953, a fledgling company called Rocket Chemical Company and its staff of three set out to create a line of rust-prevention solvents and degreasers for use in the aerospace industry, in a small lab in San Diego, California.
It took them 40 attempts to get the water displacing formula worked out...WD-40®—which stands for Water Displacement perfected on the 40th try.