I used some two part epoxy putty to repair a hole in my air cooled motorcycle head. I mixed up more than I needed and put half over the hole. The extra hardened in 1 hr just like the package said, and the stuff on the head was still soft two hours later. Why?
The answer is simple, but it took me a few minutes of "head" scratching.
The winner gets the left over ball of hard putty. Postage not included
