Well, the 3M DP8005 seems to have given up the ghost. Somehow and I'm not sure how, the epoxy unbonded from the gas tank filler neck where I had a 1.5 inch crack and I'm right back to where I was. Raw gas smell in the car. I'm calling 3M tomorrow to find out what went wrong. The oddest thing is this stuff is supposed to dry like steel and I peeled it off by hand. It held for over a year and is easily applied but I'm looking for a permanent fix and this stuff was the ONLY epoxy or sealant I found which allegedly adheres to the plastic these tanks are made of.