Gorilla glue is poly-urethane glue and humidity is the catalyst. It is strong because is does not get brittle. Be carefull this stuff expands a lot. Alcohol is the solvent used for clean up. I close the cap, wrap it in a heavy plastic bag and put rubberbands on the bag. The shelf life is about a year with care but if the humidity gets to it, it's gone in no time. Its about the same consistancy and workability as foam when it dries.