RIW Sheetseal 9000 is a key product in our range of high quality polymeric damp proof course materials. Based on a composition of Ethylene Propylene rubbers and polyester fibres which increases the tensile strength and elongation at break making the system more resistant to tearing and puncturing. RIW Sheetseal 9000’s strength, flexibility and workability provides an efficient method of controlling water penetration within a building.