Black Jack bitumen primer is a thin black primer used to give a key prior to applying bitumen paints and roof coatings. Also suitable as a primer prior to applying Black Jack flashing tape. Please note this is black in colour. Coverage 4  to 6m per litre depending on porosity of subsrate. 11m per litre on non porous surfaces. Application Black Jack bitumen & flashing primer is ready for use and should not be thinned. Apply by brush or spray. The primer should be well scrubbed in by brush. ensuring a thin even coverage. Avoid ponding/pooling when applying by spray. With fibre cement or rag felt, apply generously to saturate the surface. Surface preparation As with all surface coatings, preparation of the surface is of great importance and will influence the degree of adhesion obtained and the life of the coating, All surfaces must be sound, stable and thoroughly clean and dry. Metal surfaces should be wire brushed to remove rust.  Where long term protection is required an initial treatment of a rust inhibitive product such as red lead or zinc phosphate should be used. Loose or blistered paint should be removed as should tar based paint systems. New galvanised surfaces should be roughened with a wire brush or treated with a proprietary etch primer. Storage Black Jack bitumen & flashing primer contains a flammable solvent, and all normal precautions against fire must be taken during both storage and use. Store in original container in cool dry conditions. Keep away from sources of ignition. Shelf life Storage life 24 months in tightly sealed, undamaged containers.