All, I just wanted to give a shout out to Hoof Armor customer service.
The story: I got a refill kit from Valley Vet, went to use it, and it came out like water instead of epoxy and got hot enough to melt the gloves I was wearing. Yikes! The original cartridge did not behave that way! I contact customer service - they asked me to return the misbehaving one and sent me two brand new ones with tips. They agreed that the one I returned was not behaving as normal, and are doing additional investigation.
Bravo, Hoof Armor! Thank you!