Everbuild Black Jack Bitumen & Flashing Primer 1L is a high-quality, fast-drying primer designed for use on porous surfaces prior to the application of bitumen waterproofing products. Suitable for roofs, walls, and other external surfaces, this bitumen primer enhances adhesion and ensures a longer-lasting bond for subsequent treatments. It is ideal for preparing concrete, brickwork, metal, and asbestos surfaces before applying bitumen paints or membranes. The easy-to-use formula offers reliable performance in demanding weather conditions, making it essential for both professional contractors and DIY enthusiasts needing effective surface preparation.