... low-softening petroleum asphalt, then covered with high-sof Asphalt roofing felt is processed by making the paper base soaked in ... material such as talc power.This product is specialized in waterproof materials, packing, buliding damp proofing.Asphalt felt Roll Size 1x20m ... rool: 25lb, 30lb, 40lb, 45lb, 50lb, 55lb, 60lb, 70lb etc waterproof paper roofing felt