Category Archives: Mold Making Rubbers

Split mold process using Platinum Silicone : Split mold is one of many methods of mold making process. A complex part like our PUG salt shaker can be challenging. Sharpen your cutting skills and preparation is key.

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Brush on mold using Cast-A-Mold 25T : Brush on the mold can save you money. The application is a layer of silicone rubber cast-a-mold 25T or 30T and not to mention the platinum silicone all can be altered its viscosity by adding a thickening agent. The thickening agent allows you to brush on the silicone […]

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 HOW MUCH MATERIAL SHOULD I MIX?   To estimate the total number of pounds of the material to mix for a given project, first measure the pattern to determine the volume to be cast in terms of cubic inches.   2. Choose a material suitable for your application and find how many cubic inches are […]

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There are two types of silicone rubber: Tin (condensation) cured and Platinum ( addition) cured silicone rubber. Both types has advantages and disadvantages and neither are compatible with one another. Silicone rubber is an excellent choice for making molds, they offer excellent strength, flexibility, and are self-releasing. The only thing RTV silicone will stick to is […]

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Dimethyl fluid additive: Thins silicone Cast-a-Mold silicone thinner is a dimethyl fluid with a viscosity of 50 cps. This thinner will be compatible with any of our silicone rubbers. Lowering the viscosity of a mold making rubber will allow the silicone to flow more easily into smaller detailed areas. We recommend only adding 3% to 5%. […]

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