Everbuild Black Jack Flashing Tape 300mm is a self-adhesive, aluminium-faced bitumen tape designed for waterproofing and weatherproofing a variety of surfaces in roofing and general building applications. Ideal for sealing cracks, joints, and seams, this flashing tape provides a durable barrier against moisture and water ingress. Its flexible construction allows easy application to irregular shapes or corners, making it suitable for both professional contractors and DIY users. The Everbuild Black Jack Flashing Tape ensures long-lasting protection for chimneys, skylights, gutters, and other vulnerable areas.