CR (Chloroprene Rubber) umpluk, salah siji saka karet retardant geni alam, amarga iku kalebu klorin, dhewe nduweni retardant geni lan fireproofing function.As CR karo bahan utama, minangka reinforcing agen, ngisi agen, foaming agen, vulcanizing agen karo tambahan digawe bahan spons.