How to Make Custom Rubber Parts
Silicone and plaster are all you need to reproduce hard-to-replace rubber bushings, gaskets, and more.
I needed a small rubber part for my toilet and I could not find a replacement anywhere. Fortunately I still had the old one, so I figured I could make a custom rubber part. I set the original piece in a plaster mold.
After the mold set, I put 100% silicone caulk in the mold and let it cure overnight. By morning I had another matching piece that worked fine. I am sure this technique could work for other hard-to-find rubber parts.
— Eli Gluck; Brooklyn, N.Y.
From Fine Homebuilding #282
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