So I am making coasters from logs of wood that I have cut down from my yard and filling the various splits and imperfections in the wood with colored epoxy. They look AMAZING!! The issue I am having is when pouring the epoxy to fill the voids. I have used blue masking tape, red sheathing tape and the sliver HVAC tape to create a “mold” around the piece of wood to keep it where I want it. The best that I have found as far as leak-proof is the sliver tape – its expensive but also once the epoxy has set enough to remove it, I have a very difficult time getting it off. Removing it typically involves razor blades and chisel to get it to release. Any suggestions on something that is going to adhere well to the shape of the wood and provide a liquid tight seal?
Thanks for your help!