This product is processed by making the paper base soaked in low-softening petroleum asphalt,then covered with high-soft-ending petroleum asphalt,and last coated with isolating materials such as top powder.
It is widely applied to the simple waterproofing,temporary-building waterproofing,building dampproofing,packing as well as the single,multi-layers waterproofing of building roofs,undergroud facilities,water conservancy projects,etc.