Silicone rubber hardness of the national standard as follows: 55 degrees plus or minus 5 degrees, the maximum hardness of 70 degrees can be done. Can be done a minimum hardness of 50 degrees. Temperature for the silica gel products; 280 degrees, 380 degrees can be done with import rubber. It generally applies to medical equipment, food, mechanical grade, high-end cars, this product has been used in PVC windows and doors on the EU countries, the product environmentally friendly