Ashley,

I like the dialogue you have going regarding the various hot melt types and brands! I cannot tell you where I heard about the 3792 failing but I can see if I get dig that up somehow. As for Jasons comment about archival hot glue, it has been an issue where museums are looking at long term use, otherwise it may not be an issue for short term use in crates.
As for Ashley's comment about Ethafoam failing that is true from the SealedAir plants but not the case in the old Dow plants. We noticed a slight physical difference in the two and started asking them about it. They are trying to provide a consistent product but everyone should be aware of the differences. Foams due change from time to time.