... mold silicone rubber features description The manual mold silicon rubber features with the resistance to deformation, good ... be duplicated, take certain amount of the silicon rubber, add 2% to 3% solid curing agent, and ... an available vacuum pumping machine, mix the silicon rubber and curing agent evenly and then take ... 4% to 1%-2%. In this way, the pre- crosslinking time of silicon rubber will slow down ...