Hindustan composites ltd manufactures and markets asbestos industrial products and friction materials. Compo c/bb/k brake block is a rigid moulded friction material, grayish black in colour, having a random fibre asbestos base and containing metallic particles. It is manufactured only in the form of brake blocks, integrally moulded to a back plate. This material was originally developed to have the ability to withstand the heavy braking demands of electric multiple unit [emu] stock, operating in suburban passenger services. Its use has been extended to a range of duties from low speed shunting locomotives to high speed passenger trains.
