Everbuild 903 Black Jack Bitumen Mastic (1Lt) is applied by trowel to repair holes in roofs and bituminous coatings. The mastic dries quickly to leave a flexible protective coating, with a durable weatherproof surface skin reinforced by added fibres, but soft mass below to permit and flex with natural movement.
Everbuild 903 Black Jack Bitumen Mastic beds, bonds, and seals, and is suitable for use on many materials, such as: mastic asphalt, roofing felt, corrugated and cast iron, fibre cement, slates, lead, copper, zinc, concrete, and timber.