Looking for help please. I’m attempting to cast an oblong lamp consisting of wood and leds embedded in epoxy.
I’m trying to create a border/fence whatever it’s called of polypropylene board to creaet a mould and to shape the lamp. My issue is that I can’t get it watertight and I’m worried about pouring in resin and it all flowing out.
The wall of the mould are glue gunned to a polypropylene base.
Is there a better way to do it? Would tape work? Does it need to be watertight?

You can try using filleting wax or plasticine around the joins or worst case, flash tape but flash tape on the inside will leave slight lines where the edge of the tape is.


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant

Thanks.. plasticine was the next way I was going. Going to try one more round of glue gun first.

I’m using glass cast 50... how quickly will it cure enough to seal a small leak if it’s not perfect?

Glasscast 50 has a long pot life, which enables it to be poured in thick layers. The actual time it stays liquid depends on the dimensions of the part, but in terms of sealing a  leakage: too long.