SBS Extra Gum (often listed as Extragum SBS) is a high-performance, polymer-modified bituminous torch-on roofing membrane, typically used as a mineral cap sheet for flat roofs. It is known for its durability, flexibility, and strong adhesion in built-up roofing systems, frequently featuring a polyester reinforcement and a, usually, charcoal mineral finish. Collection from b18 7bs or b61 0qb 0121 456 3555/ 01527 390098
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