1. Silica gel is non-toxic and environmentally friendly
2. The silicone fluidity is better, and the viscosity is low and easy to operate.
3. The smaller the shrinkage of silicone, the better.
4. The pulling force of silicone is better.
5. Made of silicone mold can not be deformed.
6. High temperature resistance, adapting temperature is between -60°C and 300°C. There are many times of turning over, the longer the service life is, the better the resistance is.