Visqueen Ultimate Geoseal 2.44m x 20.5m x 1mm

Visqueen Ultimate GeoSeal is a high-performance, pre-applied membrane that combines waterproofing and ground gas protection in one. Designed for below-ground structures, it protects against methane, CO₂, radon, VOCs and moisture. Supplied in 50m² rolls with a tough grey surface for concrete adhesion.

Features & Benefits

• Dual protection – water and gas barrier in one
• BBA certified and VOC resistant (CIRIA C748 compliant)
• Suitable for NHBC builds and brownfield sites
• Resists radon, methane, and CO₂
• Tough and impact-resistant – ideal for demanding sites
• Pre-applied system – laid before concrete pour
• Supports tape or heat-welded jointing

Applications

• Basements, lift pits, retaining walls
• Raft slabs and below-ground concrete structures
• Contaminated land and brownfield developments
• Projects requiring BS 8102 and BS 8485 compliance