[TR7RVMan]

Hi, JB weld is a brand of adhesives. They make many types. Epoxy is generally a 2 part system, often mixed 50/50.
Depending upon the version cure time is 5 minutes to 24 hrs. True curing takes longer.
I’d recommend looking over JB website to see what they offer. JB is sold locally in many stores in USA, but is it the best version for your use?

Exactly what version was successfully used for filling pits in the tubes?
Don

 

[NMTR6]

I used JB Weld by JB Weld........this is the original product, it's a steel reinforced epoxy. Sets 4-6 hrs. Cures in 15-24 hrs. Allow 4-6 hrs before handling and 15 hrs (min) before putting back into use!cheers