Silicone rubber foam is widely used. Because of its excellent properties of silicone rubber and foam material, it has high resilience and aging resistance, and has the properties of sound absorption, damping and other foam. It is widely used in waterproof, shock absorbing, sealing gaskets (sealing grade IP68), noise insulation, insulation, aviation insulation and other performance requirements. According to the bubble structure, silicone rubber foam is divided into three types: closed, open and mixed.

Closed cell foaming silicone foam materials have better shockproof cushioning, sound insulation, heat insulation and flame retardant and explosion-proof properties. They are mainly used in automotive field for insulation foam tube for automotive air conditioning, automotive shock absorption, foaming silicone seal gaskets for new energy vehicle batteries, etc. At present, most automotive interior materials, such as flooring, ceiling, steering wheel, car seat and so on, are polyurethane foam materials. This is because the technology of polyurethane foam is relatively mature, and its performance meets the needs of use. On the other hand, the price of polyurethane foam is low. However, polyurethane foam has poor weatherability and flammability and releases a lot of toxic gases harmful to human body during combustion. Therefore, with the promotion of foamed silica gel material and the improvement of people's understanding of it, the foamed silica gel material is expected to replace the traditional polyurethane foamed material in the future.