Recomendations for clear resin or epoxy?

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Zombie Killer

Master Member
RPF PREMIUM MEMBER
Anyone know of a good clear resin or epoxy that is forgiving in the bubble area and that does not get hot while curing? I want to put it in clear acrylic tubes to simulate liquid. I tried some of smooth ons 325 but it gets so hot is causes stress cracking in cast acrylic. Also as it cools it shrinks so once cures it is smaller then the tube and just comes out of the tube.

I tried it in this tube and it ends up with a million hairline stress cracks.

IMG_20201107_093203658.jpg
 

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