Description HY-E640 is a kind of two part silicone rubber in addition cure or platinum cure type with mixing ratio of 1:1 or 10:1 . It can cure at room temperature as well as under heat . Itâ??s a kind of food grade silicone and mainly used for mold making. Application HY-E640silicone rubber is mainly used for making molds of concrete stone,GRC,polyurethane products ; wax, candle decoration ; rapid prototyping and tyre molds; chocolate,candy and similar products . Characteristics An exceptional fluidity and good operability, easy to demold Good tensile and tear strength Outstanding bubble releasing Non-deformation Low shrinkage Aging resistance ,high temperature resistance (200â??) Environmentally, food-grade