BPI Membrane Sealing Rope 10mm x 4.75m – Black

Product Description

This black butyl sealing rope (10mm x 4.75m) is designed for professional waterproofing applications, providing a flexible, watertight seal around cavity drain membrane fixings and joints.

Manufactured from high-performance butyl, the rope remains permanently flexible and adhesive, allowing it to conform tightly around fixing plugs, service penetrations and membrane laps. This ensures a reliable seal that prevents water tracking behind the membrane—critical for maintaining the integrity of Type C waterproofing systems.

Used as part of a complete cavity drain membrane installation, this sealing rope is an essential component for achieving a fully compliant and long-lasting waterproofing solution.

Special Features

• High-Performance Butyl – Permanently flexible and highly adhesive for a dependable seal
• Watertight Protection – Prevents moisture ingress at fixing points and joints
• 10mm Diameter – Ideal for use with membrane plugs and sealing washers
• Easy to Apply – Moulds easily around fixings and irregular surfaces
• Non-Hardening – Maintains flexibility over time without cracking or shrinking
• Trade-Grade Quality – Designed for professional waterproofing installations

Typical Applications

• Sealing around cavity drain membrane fixing plugs
• Use with membrane sealing washers for complete fixing protection
• Sealing membrane overlaps and joints
• Around service penetrations (pipes, cables, ducts)
• Basement and below-ground waterproofing systems (Type C)

Specification

• Material: Butyl sealing compound
• Colour: Black
• Diameter: 10mm
• Length: 4.75m per roll
• Application: Waterproof sealing for membrane systems