Originally Posted by lawdog
Understood, but that won't solve your problem, unless you have the clamp improperly attached to the rail (i.e., you don't have the two nuts tightened against each other).
agreed, loc-tite on the lock-nuts can't hurt and may not help, but DON'T put
loc-tite on the set screw. i don't know what the stuff is like (haven't had my clamps apart yet, i'll wait til i need to) that you speak of, but seems it would be a common adjustable set screw glue/goop. maybe i'll do a search!!
edit: i reckon it's not really a set screw, but an adjustment screw.