Unit Size Net Weight Quart Kit 2.3 lb Gallon Kit 11.55 lb Five Gallon Kit 46.2 lb Mold Maxª25 Silicone is a tin-cured silicone rubber compound that has exceptional tear strength and working properties and library life. Mold Maxª Silicones feature Smooth-On's exclusive "Libra" catalyst for long library life.PropertiesTechnical Properties Mix Ratio by Weight 100A:5B Mix Ratio by Volume N/A Pot Life 60 minutes Cure Time 24 hours Color Purple Shore Hardness 25A Mixed Viscosity 25,000 cps Shrinkage 0.001 in./in. Specific Volume 23.5 cu. in./lb. Specific Gravity 1.18g/cc Useful Temperature (max)< 400¼F Useful Temperature (min)< -65¼F Tensile Strength 577 psi 100% Modulus 80 psi Elongation @ Break 375% Die B Tear Strength 130 pli Mold Max Silicones reproduce the finest detail and are suitable for a variety of industrial and art related applications including making molds for reproducing prototypes, furniture, sculpture and architectural elements. Recommended for use with ER200 mold release.Mold Maxª25 Silicone can be thickened with THIVEX additive for brush-on applications. Mold Maxª Silicones can be used to cast a variety of materials including wax, gypsum, low melt alloys/metals and urethane, epoxy or polyester resins (without using a release agent).Documentation 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.799677 - Mold Max 25 - Gallon Kit799678 - Mold Max 25 - Five Gallon Kit Related ProductsRELATED PRODUCTS: Silc Pig Silicone Pigments Ignite Fluorescent Colorants Ease Release 200 Ease Release 205