Mainly used in hot melt road and rail tunnel washer welded waterproof board. The company's product features adaptable, flexible mix of raw materials in line with the major water board manufacturers of various types of water board, the existing red, white, black and pvc material, for you to choose. Can be divided according to diameter 65mm, 70mm and 80mm in three models and the network is currently the lowest price, welcome to construction units and distributors to inquire! 13463848892