Foam rubber sheet is made of high-performance nitrile rubber (NBR) and polyvinyl chloride (PVC) as the main raw materials, with various auxiliary materials, and is mixed, extruded, and foamed into the final product through special formula and process. It is a flexible insulating material. It is resistant to aging, UV, ozone, extreme temperature and flame retardant, shock absorption, good sound absorption, Flame-retardant, self-extinguishing, no flame extension, so has the ability to resist severe cold, heat, dryness and humidity for a long time, and has a long service life， it is a thermal insulation material for various types of hot and cold pipes, containers, building installations, etc.