Bentonite Sealant for GCL Overlaps: InfraClay Sealant

Description

Introducing InfraClay Sealant®: Bentonite Sealant for Reliable GCL Waterproofing

InfraClay Sealant® is a trowel-grade sodium bentonite sealant developed to complement InfraClay® geosynthetic clay liners and other below-grade waterproofing systems. Designed for Australian construction and civil environments, it swells on contact with water to form a durable, watertight seal around overlaps, penetrations, transitions, and terminations. This makes it an essential accessory for controlling leakage paths in basements, tunnels, buried structures, and other critical waterproofing details.

Designed to Support GCL Overlaps and Critical Junctions

While GCL systems provide the primary hydraulic barrier, project performance often depends on how well joints and detailing are sealed. InfraClay Sealant® is specifically formulated for these vulnerable points, including GCL overlaps, drain outlets, and construction joints. Its trowel-grade consistency allows for controlled, practical application on site, helping installers achieve a continuous seal in areas where water ingress is most likely to occur. :contentReference[oaicite:1]{index=1}

Sodium Bentonite Performance You Can Rely On

Manufactured as a sodium bentonite paste, InfraClay Sealant® expands when hydrated, helping to close gaps and strengthen the waterproofing system at connection points. The technical data sheet reports a swelling index in volume of at least 220% after 72 hours, no visible cracking after low-temperature exposure at −20 °C for 72 hours, and no visible seepage when applied at 5 mm thickness over a GCL overlap for 24 hours. These properties make it well suited to below-grade detailing where dependable sealing is required. :contentReference[oaicite:2]{index=2}

Optimised for Australian Construction Conditions

InfraClay Sealant® is designed for practical use across Australian projects where installers need a robust detailing material that works with GCL waterproofing systems. Recommended application thickness is 4–5 mm, with typical consumption rates of 5–8 kg/m² for flat details and 10–16 kg/m² for corner fillets. Supplied in 20 L buckets with a net mass of 25.7 kg, it is suitable for both planned installations and on-site detailing adjustments. :contentReference[oaicite:3]{index=3}

An Essential Accessory for Complete Waterproofing Systems

InfraClay Sealant® is not a standalone liner but a critical supporting product that helps ensure the continuity of the overall barrier system. By improving sealing at terminations and changes in geometry, it helps maintain the integrity of GCL-based waterproofing in structures where leakage control is essential. This makes it a valuable addition to projects requiring reliable below-grade moisture protection and long-term detail performance.

Typical Applications for InfraClay Sealant®

• GCL Overlaps: Helps seal lap joints between adjoining geosynthetic clay liner sheets.
• Drain Outlets: Provides detailing around outlets and discharge points where leakage paths can develop.
• Construction Joints: Assists with waterproof sealing at junctions in buried concrete and structural works.
• Penetrations and Transitions: Suitable for detailing around irregular interfaces and service penetrations.
• Below-Grade Waterproofing Systems: Complements GCL installations in basements, tunnels, and buried structures.

Resources (1)

• Datasheet Download

Technical Guides & Case Studies (0)