Triple layer, quality high performance roof underlayment membrane that contains a polypropylene layer protection on both sides. Mastermax 3 Extra is strong, vapour-permeable and UV resistant, providing your property maximum protection against harsh weather conditions. It is tear resistant and extremely pliable, making installation an ease.
Special and strong anti-slip coated synthetic roofing underlayment with low water absortion and high tensile strength properties ensuring easy application and durability.