... is mainly used as excellent substrates for waterproof roofing materials. Product feature:High strength, corrosion resistance, high porosity, easy ... soaking into bitumen and other good characters.Product application: It is an ideal basic material for roof ... It is used for reinforcing waterproofing roof and waterproofing membrane..Product data:Area weight: 45g/m2, 50g/m2, 60g/m2, 90g ...