Bubbles, like micro or from a bad pour?
If the 40 stuff is warmed up with a space heater it becomes much more viscous. Which allows more bubble to float out of the mix.
I have never used 42, I think it just has a higher catalyst mixing ratio.
It should clearly encapsulate metal, less operator error.
Appreciate the post.I built a stand out of 2x4x8s to support the tank with the corners on a 45 degree. I just mixed up 100ml x 5ml to fill the 8' long seams.