On Sat, 19 Jan 2008 19:32:51 GMT, "William Wixon"
wrote:

just wondering, is there a good technique out there for capping a open tube
of silicone caulk?

I use a ~300 mm long x 3mm brass welding rod pushed into the tube as
far as it will go. I normally cut the dispenser end to about a 3mm
diameter hole so the rod is a snug fit. Even if the caulk has
hardened in the dispenser tube, removing the rod leaves a hole right
back to the moving end to allow the soft caulk to exit.

Alan