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Sika Black Jack 905 is a full-bodied, solvent-based bitumen compound with added fibres, applied by brush as a general-purpose roof coating. It waterproofs roof coverings including asphalt, built-up felt, concrete decks, cement sheeting, metal, slates and tiles, and is also designed for non-plastic guttering and structural steelwork. The coating dries to a tough black finish, is fast-drying, and resists wash-off by rain soon after application, making it suitable for winter use. It can be used with rot-proof hessian or bitumen-coated glass-fibre scrim and as a vapour barrier on walls and roofs.
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