Why Didn't Anyone Tell Me this About Epoxy?

It sounds like hot glue. You put the sticks in the gun, which heats them up to apply to the work.

This may also lead to an increase in brittleness after heating...

https://www.sciencedirect.com/science/article/pii/S0032386117305293

Some 25yrs ago such or similar material was being used as grouting material for hold-down bolts on equipment. Equipment that tended to get quite hot, like steam turbines, started experiencing troubles from misalignment and other problems due to movement.

I had refused that stuff for boiler feed pump and circulating hot water pumps. Found the info in tech periodicals.

In the instructions for use, the epoxy manufacturer may well give the softening temperature.

Not on the epoxy I buy from Poundland (they currently have a sale on: 50p (about 65 cents) per packet).

Good price, I'll have a look in our local branch.

I'd like to find an epoxy that has the resiliency to take constant and repetitive impact blows, hold up to hammer service when used as seal when filling the gap between a hammer, sledge hammer, or maul head and its wood handle.

Any suggestions?

Like this?

Apologies in advance if there's a reason not to go the normal route: some times things that everyone else knows just seem to evade our attention.

Look up "wedge for hammer head"

https://a.aliexpress.com/_EIRQG9U

Just knock one or two into the handle end, so that it splays out tight against the hole in the tool head.

I accidentally made a waterfall table out of epoxy. It was a slab of epoxy about 3.5' long and 18" wide. I attached it to the top of a smaller wooden table (1'X2") at one end and put a 30lb counterweight at the bottom of the table. It worked great for a while. Then I left it out in the sun in the summer (98 degrees +), it softened and bent to the ground. Looked really nice but i couldn't use it for its intended purpose any longer.