Henry Polyester Fabric is an unsaturated spun bonded polyester mat that will not absorb moisture or rot. It resists damage from soil acids and alkalis and exhibits porosity that allows good interply bond between layers of the membrane as well as good strength and tear resistance. Polyester Fabric is used as reinforcement with both hot and cold applied waterproofing membranes. The mat provides tensile strength and control of thickness. When Polyester Fabric is used with hot applied rubberized asphalt as reinforcement, it reduces pin holing over concrete decks.