Locks that work

I've been meaning to try a silicone lubricant - I need to get some anyway as it is recommend for the locks I fitted to my UPVC doors after reading about burglars using snapping and bumping to easily defeat regular euro locks.

I thought having really slick, lubricated locks would make it easier to pick/bump...

I assume that lock lube coats the lock parts in a thin layer of graphite, which would protect them, but mainly it's for lubrication.

Even GT85 should be better than WD40. GT85 contains PTFE. The lowest friction substance known to man.

I purchased some graphite lock lubricant from Maplins. It's in a little bottle that has a nozzle you insert into the lock and push in

How small is it? Really small like only 15ml?