Unit Size Net Weight Pint Kit 2 lb Gallon Kit 18 lb Five Gallon Kit 90 lb Mold Star rubbers are easy to use platinum silicones which are mixed 1A:1B by volume (no weighing scale necessary). Mold Star silicones feature relatively low viscosities and vacuum degassing is not required for most applications. Mold Star silicones cure to soft, strong rubbers which are tear resistant and exhibit very low long term shrinkage. Molds made with Mold Star will last a long time in your mold library and are good for casting wax, gypsum, resins, concrete and other materials. Cured Mold Star rubber is heat resistant up to 450F (232C) and is suitable for casting low-temperature melt metal alloys. Note: THI-VEX¨ is NOT compatible with Mold Star¨ rubbers. Note: This product will not work with modeling clays containing sulfur under any circumstances.Guide to Making Silicone Molds from SLA 3D Printed Models PropertiesTechnical Properties Mix Ratio by Weight 1A:1B Mix Ratio by Volume 1A:1B Pot Life 6 minutes Cure Time 30 minutes Color Blue-Green Shore Hardness 16A Mixed Viscosity 12,500 cps Shrinkage < .001 in./in. Specific Volume 23.5 cu. in./lb. Specific Gravity 1.18g/cc Useful Temperature (max)< 450F Useful Temperature (min)< -65F Tensile Strength 400 psi 100% Modulus 55 psi Elongation @ Break 440% Die B Tear Strength 88 pli Media VideoDocumentation Technical Bulletin Special Order Items PRODUCT ADVISORY: The products listed below are currently SPECIAL ORDER items and require pre order. Lead times may vary - For more information please contact our staff.799757 - Mold Star 16 Fast - Five Gallon Kit Related ProductsRELATED PRODUCTS: Silc Pig Silicone Pigments Ignite Fluorescent Colorants Ease Release 200 Ease Release 205