... prototyping,PU resin,wax,stone HY- E642# Addition Molding Silicone DescriptionHY- E642# addition molding silicone is generally named two-components ... suitable for making FDA molds application.Applications,HY- E642# addition molding silicone could be mainly used for making concrete ... out the original model, and there you get a finished addition cured silicone mold .SHELF LIFE: Twelve (12) months ...