Dupont Teflon Dry Wax Lubricant
The dry teflon stuff is safest.
WD40 is too short-term.
Other oils will eventually harden and will often attract and trap grit making things worse.
Low Temp Gun Oil will work well but doesn't last long once it gets wet. Graphite oils work well for short-term, but graphite eventually absorbs water and goes from a lubricant to an abrasive!
I have worked with some amazing Tribologists and Molydisufide or dry teflon are their 2 recommendations for reliable open-air lube. With the water exposure the best results is with the Teflon Dry Wax lube. Not just for locks, but kickstand and chain too!
Last edited by 2xadv; 09-27-2008 at 03:12 AM.