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TAP Silicone RTV Mold-Making System
TAP Silicone RTV Mold-Making System is a complete mold making system that can be used to make virtually any type of mold. TAP Silicone RTV is a two component, tin catalyzed, room temperature cured silicone rubber. It is designed as a 25 Shore A mold rubber – meaning it is flexible, good dimensional stability, and good elongation and tear strength. It has very low shrinkage, excellent long-term retention of rubber properties and accurate detail reproduction. It is excellent for casting cement, vinyl, wax, plaster, low-melt metals, urethane resins, epoxy resins and polyester resins. It is a safe product to use when directions are followed fully. Maximum recommended casting temperature is 350ºF. TAP Silicone has a 6-8 hour demold time allowing two part molds to be completed in one day.
Side A (Silicone) is an off-white liquid with medium viscosity of 60,000 cP. Since this is a tin or condensation cure system, cure inhibition is not common. However some sulfur containing clays can inhibit the cure. The clay TAP carries will not affect the cure. Testing should always be done if there is any uncertainty.
Side B (Catalyst) is blue to make it easier to tell when the silicone is fully mixed no streaks.. Mixing ratio is 10 parts side A to 1 part side B by weight, or 9-to-1 by volume. Catalyst must be shaken prior to using.
Silicone Thinner is a clear silicone fluid that can be added to reduce the viscosity of Silicone RTV. Ideal for creating a bubble free skin coat prior to adding a thick coat. Use no more than 10 parts of thinner to 100 parts of silicone by weight. The thinner will increase working time and decrease final hardness and tear strength. Sold separately.
Thixotropic Additive increases the viscosity of silicone from a slow flowing liquid up to a "peanut butter" consistency paste. Recommended mix ratio is .5-5% by weight, depending on the viscosity desired. Adding more than 5% will degrade the mold quality. The additive allows the silicone to be brushed on vertical surfaces and to be used for glove molds. The Thixotropic Additive does not change cure time. Sold separately.
1 lb. of silicone yields about 12 fl. oz.
Video instructions for making a simple silicone mold, click here.
Click here for Mold Making directions made simple... the TAP way.
Click here for TAP Silicone RTV System Product Bulletin.
Click here for Rhodia Moldmaking Guide.
Click here for Choosing A Mold Material guide.
Click here
for more information about TAP Silicone RTV Mold-Making System.
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This item is a shipping hazard and can only ship via ground delivery. Please
call us at 209-937-9300 or email: info@tapplastics.com for more information. Hazardous items cannot ship
outside the US.
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