Magikmold® P-508 Platinum Cure Silicone Rubber

Magikmold® P-508 is a platinum-cured, room temperature curing (RTV), translucent silicone rubber designed for the manufacture of high-performing, flexible molds. This two-part (Catalyst & Base), liquid silicone rubber has a Shore Hardness of A8, a pour time of ~20 minutes, and a demold time of ~3-4 hours. This very soft silicone is popular for making molds of highly detailed and delicate objects (e.g., candle and soap molds). Magikmold® P-508 molds are commonly used to cast the following materials: Urethane (polyurethane) plastic and rubber Plaster Polyester Casting Resin Cement, Concrete Epoxy Soap Wax Low-Melt Metals   Release agent is not necessary for casting most materials into Magikmold® P-500 Series molds, but for longer mold life with epoxy, polyurethane or polyester resins, a barrier coat or release agent (e.g., Stoner E-236 Urethane Mold Release) is recommended. This is a pourable rubber, but it can be easily thickened with silicone thickener for brush-on application. FOR INDUSTRIAL/PROFESSIONAL USE ONLY.    Physical Properties Type Platinum-cured (addition-cure) Mix Ratio by Weight 1A:1B Shore Hardness A8 Pot Life 20 min. Demold Time @ 77°F 3-4 hr. Cured Color Translucent Mixed Viscosity 2,400 cP Specific Volume 26.6 in³/lb Specific Gravity 1.04 Tensile Strength 185 psi Elongation 781 % Die B Tear Strength 35.4 pli Die T Tear Strength 11.8 pli   CURE INHIBITION: Contamination from amines, sulfur, tin compounds, polyester resins, some paints and some silicone rubbers may inhibit surface cure of this product. Perform a test cure on an identical surface to determine that complete curing and good release are obtained. Product Literature Technical Bulletin: Magikmold® P-500 Series Technical Data Sheet Safety Data Sheets: Magikmold® P-508 Catalyst & Base SDS