Water actively flowing through a crack in concrete means more than just a drip; it means compromised integrity and immediate risk. Stopping that flow is the urgent priority. Gripset C-Plug delivers an instant, pressure-resistant seal, bringing active water leaks under control within minutes. This allows work to progress, securing the area for long-term waterproofing solutions.

Why this product exists

Traditional waterproofing membranes and repair mortars require dry conditions to perform. When water is actively flowing, these products are ineffective, leaving structures vulnerable to ongoing damage. Gripset C-Plug was engineered for these precise situations. It arrests active water leaks and seals openings in concrete and masonry surfaces where conventional methods fail, providing a critical first step to secure a compromised area.

This cement-based compound forms a non-shrink, high-compressive-strength plug that withstands ongoing water pressure. It is specifically designed to stop leaks under duress, preventing cascading damage and structural compromises that result from unchecked water ingress.

The numbers that matter

• Rapid Set Time: With an initial set in less than 1 minute and a final set within 2-4 minutes, Gripset C-Plug immediately halts water flow. This rapid action minimises downtime and prevents further water damage, allowing follow-up work to begin quickly.
• Compressive Strength: It achieves 8 MPa of compressive strength in just 30 minutes, escalating to 35 MPa after 28 days. This ensures the plug is not just a temporary barrier but a robust, structurally sound repair that can resist significant water pressure over time.
• Non-Shrink Formulation: This compound does not shrink as it cures, creating a tight, permanent seal that maintains contact with the substrate. This prevents new pathways for water to exploit around the repair, enhancing the overall integrity of the fix.
• Reinforcement Safe: Gripset C-Plug is formulated not to promote corrosion of steel reinforcement. This is critical for concrete structures, ensuring the repair does not inadvertently weaken the embedded steel components over the long term.

What it's like to use

Using Gripset C-Plug requires precise and rapid execution due to its fast-setting nature. Prepare the surface by grinding cracks or holes to a minimum 20mm width and depth, ensuring a square or dovetail profile, not a 'V' shape. This creates a mechanical key for maximum adhesion. Flush the area to remove loose debris, then dampen the surface with clean water just before application.

Mix Gripset C-Plug by hand, in small batches (approximately 0.5kg), using around 150ml of water per kilogram of powder. Avoid electric stirrers; mix quickly with a spatula to a paste or putty consistency. Once a slight warmth is felt or setting begins, immediately press the material firmly into the opening. Maintain pressure until set, then slowly release. For larger areas, work from the outside in. After setting, dampen the plug with water for 15 minutes to aid curing.

Where this product excels

• Basement and Cellar Leaks: When active leaks appear in subterranean structures like basements, cellars, or lift shafts, Gripset C-Plug instantly stops the water, preventing further damage and preparing the surface for a full waterproofing system.
• Water Retaining Structures: For water tanks or concrete retention structures, it provides an immediate fix for cracks or holes, sealing leaks under pressure without the need to fully drain the structure in all cases.
• Civil Infrastructure Repairs: In tunnels, culverts, or sewer systems, this rapid-setting plug can seal leaking joints or cracks in concrete segments, minimising disruption and providing a durable repair in challenging, wet environments.
• Anchoring in Wet Conditions: It excels at rapid-set anchoring of bolts, fixtures, and pipes into primed or dense concrete, even in damp conditions, offering a quick and secure hold where other anchors might struggle.

How it fits in a real system

Gripset C-Plug serves as the crucial first step in a comprehensive waterproofing strategy when active water ingress is present. It is designed to halt the immediate problem, creating a dry and stable substrate. Once the leak is stopped and the C-Plug has cured, it prepares the surface for the application of a long-term waterproofing membrane. For enduring protection against future dampness and seepage, the set Gripset C-Plug is typically covered with a flexible cementitious membrane like Gripset C-1P.

Choose this when

• When water is actively flowing through cracks or holes in concrete or masonry and requires an immediate stop.
• For urgent repairs in basements, lift pits, water tanks, or tunnels where rapid sealing is critical.
• When needing to create a waterproof, pressure-resistant fillet at wall/floor junctions in water-retaining structures, prior to membrane application.
• For rapid-set anchoring of equipment or fixtures into concrete surfaces where a quick, strong hold is necessary, even in damp conditions.

Don't use this when

• Not for: Expansion or movement joints. Its rigid, non-shrink nature makes it unsuitable for areas requiring flexibility. Consider a flexible joint sealant for these applications.
• Not for: Non-cementitious surfaces. This product is formulated for concrete and masonry.
• Not for: Frozen surfaces. Ensure surfaces are free of ice for proper adhesion and curing.