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pvc for molds?


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You can get silicone lubricant at an auto parts store. Without that or mold release, you'll most likely be using a chisel to demold them.

If you can find a flat piece of PVC, you can use PVC glue to glue it to the bottom for a base. Glue all the way around on the outside. The glue welds the two pieces together. The PVC holds heat longer than a metal mold. You'll have to wait longer for repour and demolding than usual.

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