Expanding Stem Fixing Plugs for Above‑Ground Cavity Drainage Membranes

Biokil Crown Cob Plugs are engineered to secure cavity drainage membranes—both meshed and non‑meshed—above ground to substrate surfaces. Featuring an expanding stem activated by a central pin, these plugs anchor firmly into masonry, concrete, or blockwork, ensuring a reliable fixing without reliance on adhesives.

Key Features & Benefits

• Expanding Stem Design: Pins expand the plug securely into a range of substrates—including brick, stone, and concrete—for durable membrane attachment.
• Cavity Membrane Fixing: Especially suitable for the installation of Biokil Crown or Newton drainage membrane panels above ground.
• Universal Compatibility: Compatible with both meshed and non‑meshed versions of cavity drainage membranes.
• Available Lengths: Typically supplied in 70 mm, 90 mm or 110 mm lengths to suit varying membrane thicknesses and substrate depths.
• Bulk Pack Supply: Supplied in packs of 250 plugs—ideal for large-scale waterproofing installations.

Product Details

• Material: High-density durable plastic plug with steel pin
• Colour: White
• Pack Size: 250 plugs per box
• Size Options: 70 mm, 90 mm, 110 mm lengths

Typical Uses

• Securing above-ground cavity drainage membrane to walls or sub-surfaces
• Installation of Newton or Biokil Crown membrane lining systems in basements and cellars
• Anchoring membranes to blockwork, stone, brick, or concrete substrates