Multiseal, Grey-Green - Bituminous sealing tape - Roof and roof repair - Waterproof - 100mm X 10m roll. Multiseal, Grey-Green - Bituminous Sealing Tape. Why Choose Multiseal?. Ideal for Roofs: Specifically designed for the repair and sealing of roofs, this bituminous sealing tape is perfect for roof tiles, downspouts, and chimneys.
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