BPI 110mm Membrane Cob Plugs – Pack of 200

Product Description

BPI 110mm Cavity Membrane Cob Plugs are heavy-duty fixings designed to securely anchor cavity drain membranes into low-density substrates such as aerated concrete, blockwork, and masonry.

Each plug is supplied with a central drive pin, which expands the body of the fixing when inserted, creating a tight mechanical grip within the substrate. This ensures a firm, long-lasting hold when installing waterproofing membranes as part of a cavity drainage system.

Ideal for use in basement waterproofing and structural damp-proofing applications, these cob plugs provide a reliable fixing solution where standard plugs may not achieve sufficient purchase.

Special Features

• Designed for fixing cavity drain membranes into soft masonry and blockwork
• Expanding plug design ensures strong mechanical grip
• Supplied complete with drive pins for quick installation
• Suitable for professional waterproofing and damp-proofing systems
• 110mm length ideal for deeper embedment and secure fixing

Typical Applications

• Basement waterproofing systems
• Cavity drain membrane installations
• Fixing into aerated blocks, brick, and low-density substrates
• Below-ground waterproofing projects

Installation

1. Drill hole – Use a 10mm SDS masonry drill bit
2. Depth – Drill to at least 10mm deeper than the plug length
3. Insert plug – Position through the membrane and tap into place with a rubber mallet
4. Drive pin – Insert and hammer the fixing pin into the centre
5. Secure fixing – The plug expands within the substrate, creating a strong mechanical grip

Specification

• Head diameter: 50mm
• Drill hole size: 10mm
• Material: Polypropylene body with nylon expansion pin
• Installation: Hammer-in expansion fixing system