Originally Posted by jblaine
Too many people misunderstand the applications of WD40.
I found out the hard way a few years ago what WD40 does to rubber products. I conducted a test after seeing a number of rubber seals fail. I found that WD40 virutally broke down rubber into pieces, or sheets that were pulling away from the o-ring itself. not only that, but when the part was removed from the WD40 bath, it quickly swelled, then hardened.
A friend who is an engineer in the pneumatics industry recently confirmed that WD40 is a no-no in most shops that deal with rubber seals, and whatnot. Too bad too, since WD40 is such a wonderful tool.