Smooth-On Ecoflex 00-50 Platinum Silicone 2 lb Kit Smooth-On Supersoft Silicone - 3 hours demold time Kit with 2 pounds total silicone Easy ratios equal parts a and b Ecoflex 00-50 - Shore 00-50 hardness (below the Shore A scale) Translucent, can be colored with silcpig pigment