On Wed, 09 Jan 2013 21:51:17 -0600, wrote:

I put duct tape over the end of my caulking guns to keep the caulk from
drying up. It helps, biut only for a short time.
Nickles would not work. But a 3/8" lag bolt screwed into the tip works
ok too.

3/8"?! I use 16p nails or #8x2-1/2" (ish) screws, but 3/8"? The tube
will split!