How to Repair Torn Latex Rubber Molds. Natural latex molds, when properly cared for and handled, are quite durable. Sometimes they do tear however, and repairs are necessary. If the mold is in otherwise good shape and the damage is not too extensive, repairs can be simple and straightforward. Small tears may need very little work, but larger tears.
How to Repair Rubber Molds Although both silicone and urethane rubber molds are considered durable enough for repeat castings, damage can occur over time. Sometimes a rubber mold will wear away in some sections, causing the walls to become thin, or you may accidentally tear the rubber when handling the mold. Repairing a rubber mold by.
I saw in a YouTube video recently (from King of Random, he was making a mold of a roast chicken) that casting silicone doesn't stick to anything except silicone rubber (he discovered the exception at the loss of a silicone spatula). That being the case, you may be able to get some silicone intended for making molds (for casting resin or low-melting metals) and use that to stick your torn.
Although a repair may not be permanent, you can repair either a silicone or urethane rubber mold so that you can at least get a few more castings. You can then use that a casting to make a new mold. Repairing a Silicone Mold. Use Sil-Poxy® silicone rubber adhesive. Important: all .