The main chemical component of the product is polyurethane. After physical foaming, it does not contain foaming agent. It uses low-density formula and special surface treatment technology to achieve both good sealing and shock resistance and scratch resistance. It is based on PU foam. Single-sided or double-sided laminated acrylic adhesive. It has excellent airtightness to avoid gas release and atomization. Compression and deformation resistance, that is, elasticity and durability, which can ensure that the accessories are protected against long-term shock.It does not contain harmful substances, does not remain, does not pollute the equipment, and is not corrosive to metals.