What can I say this is the greatest product since sliced bread.  Tired of buying the little tubes and given all the uses that I have found for this I figured I'd buy a bulk pack. I've used this for fixing just about anything you can imagine. Most impressive was a patch job on a steam boiler. The patch held for 3 years under heat and steam pressure until the boiler was replaced. I have not found anything that works better day in and day out.