8mm Membrane - Clear - Biokil Crown

Biokil Crown 8mm Membrane – Clear

High-Capacity Cavity Drainage Membrane for Below-Ground Waterproofing

Biokil Crown 8mm Membrane – Clear is a robust, high-capacity cavity drainage membrane designed for internal waterproofing applications in basements, retaining walls, and other below-ground structures. Manufactured from clear high-density polyethylene (HDPE), the membrane features 8mm studs that create an air gap between the substrate and internal finishes, allowing water to drain freely into a perimeter drainage system or sump. The clear construction allows for visual inspection of the substrate during installation, making it ideal for damp-proofing and structural waterproofing.

Key Features & Benefits

• 8mm Stud Height: Provides excellent drainage capacity for high-moisture or below-ground environments.
• Clear HDPE Construction: Enables visibility of substrate for inspection and detailing during installation.
• Moisture Isolation: Prevents moisture and salt transfer from masonry to internal finishes.
• Compatible with Systems: Works with sump pumps, perimeter channels, and sealing accessories for full cavity drain systems.
• Durable & Chemically Resistant: Resistant to alkalis, acids, bacteria, and fungi – ideal for long-term installations.

Product Details

• Material: High-Density Polyethylene (HDPE)
• Stud Height: 8mm
• Thickness: Approx. 0.6–0.7mm
• Colour: Clear
• Roll Size: Typically 2m x 20m (40m² per roll)
• Fixing Centres: 250mm with Biokil Crown Brick Plugs or Newton MultiPlugs
• SKU: BC8CLR

Application Instructions

1. Prepare Substrate: Ensure wall or floor surface is stable and free from sharp projections or loose materials.
2. Cut & Fit: Trim the membrane to size using a utility knife or shears, ensuring full coverage of the surface.
3. Fixing: Use appropriate fixing plugs with seals at 250mm centres. Seal around plug heads if required using mastic.
4. Sealing & Finishing: Overlap sheets by at least one stud column and seal with jointing tape or overtape. Connect to drainage or sump system as specified.

Limitations

• Not suitable as a standalone waterproofing system without drainage provision.
• Internal finishes should not be applied directly to the membrane without an appropriate air gap or lining system.

Health & Safety

Wear appropriate PPE during handling and installation. Use caution when cutting membrane edges. Refer to the Safety Data Sheet (SDS) for full safety information.