Castaldo No-Shrink Pink is a premium, soft highly pliable molding rubber that provides zero shrinkage and excellent detail. This rubber is pre-cut for molds that are 1-7/8 x 2-7/8 inches (48 x 73 mm) with rounded corners. It has about 146 pieces that are 1/8 inch (3mm) thick, which will be enough for at least 20 molds, depending on the thickness of the mold. This rubber works great for molds with under cuts. Molds must be vulcanized at 310 deg. F (154 deg. C) for 7 1/2 minutes per layer.
Comes with instructions. Store away from heat. Sold in a 5 lb box..