Please note that this product is ONLY AVAILABLE FOR COLLECTION.\Isoflex High-Performance Liquid Rubber has an advanced formulation which forms a permanent flexible waterproof coating for roofs.It has 5 x greater flexibility than conventional bitumen coatings, providing extremely long lasting protection. Its tough, durable coating will not crack, perish or peel and can be used on virtually all roofing surfaces.- Adheres to virtually all roofing surfaces. - 20 Year Performance with correct preparation and application. - Impervious to all weather conditions.- Forms a permanent flexible waterproof coating.The Isoflex Liquid Rubber Weatherproofing System can be applied to all roofing substrates including felt, asphalt, slate, tiles, concrete, brick, wood, glass, metal, lead and copper. You can apply Isoflex Liquid Rubber with a brush, and depending on the substrate will need to apply one or two coats1m2 per litre on a sound, even surface will provide the required wet film thickness of 1mm.  Any roughness, however, means an increased surface area and must be allowed for in calculating coverage.  For roofs with embedded chippings estimate double the normal usage.Available in 3 Sizes.