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Sika Black Jack-903 Bitumen Trowel Mastic is a trowel-applied black heavily-filled bituminous compound with added fibres for reinforcement. The product forms a surface skin but the mass below remains soft to allow for moderate movement. Suitable for sealing and filling holes in mastic asphalt roofing felt corrugated iron metal guttering and downpipes. Heavily-filled fibre reinforced trowel applied bitumen Mainly used for: Waterproofing stopping bedding bonding and sealing.Adheres to/fills holes in: mastic asphalt roofing felt corrugated iron cast iron fibre cement slates lead copper zinc concrete and timber. Fast drying.Fibre-reinforced.Suitable for use with all bituminous surface coatings.Remains flexible for long periods after application. PTDSIKDIR852674
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