A general purpose, waterproof coating for all common roofing surfaces including mastic asphalt, roofing felt, corrugated iron, fibre/cement, slates, lead, copper, tin and zinc. Excellent adhesion to damp surfaces, resistance to extremes of temperature and does not crack in the cold or flow in the sun. Recommended where the threat of frost or rain precludes the use of an emulsion. Can be over coated with a suitable decorative solar reflective paint to prolong the life of the coating.