Butyl Adhesive Tape for Overlaps and Detailing in Cavity Drain Membrane Systems. Biokil Crown Sealing/Jointing Tape – Black is a high-performance, double-sided butyl adhesive tape designed for joining and sealing overlaps between sheets of cavity drainage membranes. It creates a watertight bond that prevents moisture ingress at membrane joints and detailing points such as wall junctions and service penetrations. Essential for use in internal waterproofing, basement tanking, and damp-proofing systems, the tape ensures full membrane integrity in both vertical and horizontal applications.. Key Features & Benefits. Watertight Membrane Sealing: Creates a secure seal between membrane overlaps and perimeter junctions.. Flexible Application: Conforms to uneven surfaces and detailing areas without compromising adhesion.. Strong Butyl Adhesive: Long-lasting, pressure-sensitive sealant for reliable performance in damp environments.. System Compatible: Designed for use with Biokil Crown and Newton System 500 cavity membranes.. Fast Installation: Peel-and-stick design for easy on-site application with no curing time required.. Product Details. Type: Double-sided butyl sealing tape. Colour: Black. Width: Typically 30mm–50mm (confirm specific product variant). Length: Typically 20m per roll. Application Areas: Membrane overlaps, internal/external corners, service penetrations. SKU: BCSTBLACK. Application Instructions. Prepare Surfaces: Ensure membranes are clean, dry, and free from dust, grease, or debris.. Apply Tape: Position tape along the edge of the membrane sheet and press firmly into place.. Join Overlap: Press the second membrane sheet onto the exposed adhesive surface, ensuring a tight, even seal.. Secure Seal: Apply consistent pressure using a roller or hand tool to achieve full adhesion across the joint.. Limitations. Do not use on wet or frozen surfaces.. Not suitable for external applications exposed to direct sunlight or weather without protection.. Health & Safety. Wear gloves during handling. Avoid prolonged skin contact with adhesive surfaces. Refer to the product Safety Data Sheet (SDS) for full guidance.
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