I thought I give my fellow forum readers a warning about sikaflex. This past weekend I was getting ready to plank the bottom of my boat. I loaded a tube of Sikaflex LOT 291 into my caulk gun, poked a hole in the seal, and tried to squeeze the handle to push the pulnger into the tube. Well the bottom of the tube is on so tight that I had to squeeze with all my might. Then it finally let go and the tip of my left index finger got pinched in and cut off buy the handles of the clauk gun. Just wanted to let you guys know.