Features: 1. Excellent tear & tensil strength 2. No shrinkage 3. Food grade and enviromental silicone Ent, the component a and component b, please pay attention to clean the component a containers before using for the component b, and vice versa 6, in order to avoid the hardness change, we should mix the component a and component b according to its mixing ratio strictly, 25kg/drum and 200kg/drum