Food grade silicone lunch-box cap seal: Temperature range: -50degrees to 300 degrees Hardness :25-80 shore A Food grade silicone lunch-box cap seal:1. Non-toxic, odorless, transparent, flame retardant, non-yellowing;2. Soft, flexible, kink resistance to deformation;3. Not cracking, long life, resistant to high and cold temperature;4. It has a high tear strength and superior electrical ...