£66.99
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Weatherproof, sand-finished underlay (part of a 2-layer system). Polyester reinforced for better tear resistance. Less heat required to melt SBS bitumen than APP and more flexible in a wider temperature range. Torch-on underlay membranes are rolled and applied hot, using a propane torch to heat the underside, which releases the molten bitumen to provide adhesion to a flat roof. Weight: 3750g/m 12 Year Life Expectancy Sand-Finished - Manufacturers part number: 401KW
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