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Description Firefly Membrane WB is a non-combustible, fire-resistant membrane that meets the stringent EN 13501-1 standard for A2 Non-Combustibility certification. Constructed from a durable woven glass substrate with one side aluminized, it offers exceptional mechanical properties. This membrane serves as a versatile barrier suitable for vapour permeable or reflective insulation applications in commercial wall facades. Key Features Non-Combustible and Fire-Resistant : Meets EN 13501-1 (A2-s1, d0) and BS476-6 (Class 0) standards. Durable Construction : Made from sturdy, long-lasting woven glass substrate with aluminized surface. Versatile Application : Suitable for use as vapour permeable or reflective insulation in commercial wall applications. Dimensions : 50m x 1250mm