Specification: Dreadnought Fibre Construction: 100% Polypropylene Colour Fastness: Light (BS EN ISO 105:B02): 6 Colour Fastness: Wet Rubbing (BS EN ISO 105: B01): 4-5 Colour Fastness: Dry Rubbing (BS EN ISO 105: X12): 4-5 Flammability (BS6307) Methanamine Pill Test: Pass Formats Sheet Tile Backing Rubber Waffle Bitumen Size 2m x 4m 50cm x 50cm Weight 2,437gsm 4,553gsm Thickness 10.00mm 11.50mm