Moldmaking with platinum cured RTV.

Moldmaking Silicone RTV

CRI-SIL moldmaking materials are available in both 45 and 60 Shore A durometer versions. They are suitable for use with stone, glass, wood, metal, wax, ceramic, plaster and clay, low melt metals, and more. From small projects to large scale architectural applications, our two-part, platinum cured materials offer easy preparation and durable molds. Both products are available in 1 to 55 gallon kits. Our moldmaking materials are mixed in a 10:1 ratio and offer approximately 2 hours of work life. These materials offer very little shrinkage with good tear strength and are suitable for molding with some undercuts.

CRI-SIL P-RTV45 and 60 Series platinum cured silicones are preferred over tin cured (condensation) due to the fact that they do not produce alcohol during the cure process. Alcohol can inhibit cure with castings made with urethane. Another added benefit of platinum is that unlike tin cure  silicones, which are commonly used as a mold making material for art and industry, tin is not normally approved for long term contact with the skin, cookware, or other food contact.

As always, if you don’t see what you are looking for, give us a call. Often times we can develop a material specifically for your needs.

RTV – Moldmaking Datasheet
CRI-SIL P-RTV45 Silicone Rubber is a two-component, addition-cure, platinum-catalyzed compound. It is a durable material with good physical properties. P-RTV45
CRI-SIL P-RTV60 Silicone Rubber is a two-component, addition-cure, platinum-catalyzed compound. It is a durable material with good physical properties. P-RTV60