Platinum Cure Silicone Foams is a soft, two-component platinum silicone flexible foam that is versatile and easy to use. Platinum cure Silicone Foams can be used for a variety of industrial and special effects applications including making foam filled appliances, padding/seat cushioning, orthotics/orthopedics, potting and encapsulation of electrical circuits and vibration dampening. HY-F663 is a RTV-2 liquid silicone rubber, general called two-component room temperature vulcanization silicone, part A is silicone rubber, part B is catalyst / curing agent. Foam silicone is platinum cure silicone / addition cure silicone, a kind of environmentally friendly material which is totally non-toxic ,tasteless, safety and health, food grade. HY-F663 Platinum Silicone Foams expands 3.5 times its original volume and develops a uniform 20 lb./cu. ft. cell structure (320 kg/m3). Vibrant colors can be achieved by addingsilicone color pigments. Cured foam is high heat resistance (will resist up to 350°F/176°C), water resistant, UV resistant and resists oxidation and ozone degradation. HY-F663 Foaming Liquid Silicone Rubber,which is widely used as a filling material for Mannequin,Streetlight Filling,seat cushion, silicone clone human, polyurethane furniture, sheet material and other rubber products.since silicone rubber foam is very lightweight, very soft and has good cushioning effect.