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BlackJack 903 Bitumen Trowel Mastic: 5ltr

Original price £28.74 - Original price £28.74
Original price
£28.74 - £28.74
Current price £28.74
in stock, ready to be shipped

EVERBUILD ® 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.


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

Type of solvent White spirit Flexibility Provides a soft resilient coating

Shelf Life

24 months from date of manufacture in undamaged containers.

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Ashbrook Roofing Supplies, Harrison Way, Matlock, Derbyshire, DE4 2LF


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