Jack sheng Rubber and Silicone, which materials are safe for your health What is rubber? Rubber is usually processed from rubber tree sap. Even. As a polymer chemically based material with high mechanical strength and elastic deformation, waterproof, good insulation, rubbe... antoan caosu caosuvasilicone silicone siliconeproduct suckhoe sukhacnhaucaosuvasilicone topsheng