... colorful sand, the other side is covered by separation materials. It is a kind of waterproof material. It ... not have the crack6Peel strength/N9Tianjin Yuhong Building Waterproof Materials Co., Ltd. is an enterprise integrating independent research and development, technology innovation, ... already occupied an area covering 60,000sqm, with a workshop area of 25,000sqm. We have 28 advanced engineers, ...