CR sponge rubber sheet or CR sponge rubber sheet is a sponge rubber sheet that has been manufactured by means of extrusion. CR sponge rubber sheet (Neoprene sponge rubber sheet / Chloroplane sponge rubber sheet) has outstanding properties about flame retardant rubber sheet, Low Combustibility (UL94HF-1 / UL94HBF), resistant to chemicals, environment resistant to works well.