Hi, this is my first time posting here so be gentle!
I am making vacuum formed styrene shells for casting concrete kettlebells.
The shells are 0.03 thick.
I put the two shells into boxes and then bolt them together.
Then i pour concrete into the mold.
Here’s the problem:
It leaks. When the some of the concrete leaks out, it ruins the surface finish.
Here’s what I’ve tried:
- glued rubber (innertube rubber) to the faces
- worked ok, but it was not durable enough
- silicone caulking - would not adhere to the styrene
Any ideas?
