Shell Shock SLOW Brushable Liquid Plastic Casting Resin - Trial Unit Pot Life: 8 minutes; Cure Time: 5 hours (depending on mass) Ideal for making fast, lightweight rigid molds for creating silicone appliances and effects (use as a replacement for stone molds) Can also be brushed onto styrofoam (polystyrol) as an impact resistant coating that can be sanded, primed and painted (minimum 3 coats recommended) You can also brush a gel coat into a rubber mold and back it up with rigid foam, creating a highly detailed lightweight casting. Color effects are possible by adding SO-Strong Color Tints.