E-640 is very suitable for making silicone rubber stone molds. It is featured with extremely low shrinkage, good fluidity and resistance to many kinds of chemicals; This material do not release any by-product with low molecular weight during its curing process, and it's cured from top to bottom and from the inside and outside simultaneously, namely, deep curing. The E sereise platinum cured silicone will not have the problem of degradation, stick