11
Trade quote
Custom pricing available
Tell us what you need and we'll come back with a quote.
Custom trade quote
Share your quantity and project details for a tailored quote.
Gripset C-Plug is a rapid-setting cementitious repair compound designed to arrest active water ingress in critical concrete and masonry infrastructure. This non-shrink formulation achieves an initial set in under 60 seconds, allowing for manual pressure application to stop flowing water in lift pits, tunnels, and water tanks.
With a final compressive strength of 35MPa, it integrates into the host structure to restore mechanical strength without promoting corrosion of steel reinforcement. Professional installation requires chasing cracks to a minimum 20mm depth with a dovetail profile to ensure a permanent mechanical lock against negative hydrostatic pressure.
While ideal for subterranean remediation, Gripset C-Plug must not be applied to expansion joints or non-cementitious surfaces. For comprehensive protection against future seepage, the cured plug is compatible with the Gripset C-1P cementitious membrane system.
Frequently Asked Questions
How fast does Gripset C-PLUG set?
Gripset C-PLUG begins setting within 30–60 seconds of placement and achieves final set in 2–4 minutes. Work quickly in small batches to ensure correct placement before curing begins.
Can it be applied to active water leaks under pressure?
Yes. Gripset C-PLUG is designed for active leak sealing, forming an instant waterproof barrier even under hydrostatic pressure. Ensure the substrate is cut to the recommended profile and dampened prior to application.
Is Gripset C-PLUG safe for potable water applications?
Yes. The formulation is non-toxic, non-staining, and odour-free, making it suitable for sealing leaks in water tanks and other potable water storage structures.
Can I sand or grind Gripset C-PLUG after curing?
Yes. Once cured, Gripset C-PLUG can be sanded or ground to match surrounding structural contours, ensuring a flush and professional finish.
Is it compatible with Gripset membranes?
Yes. For long-term waterproofing, particularly in negative water pressure situations, overcoat Gripset C-PLUG with Gripset C-1P flexible cementitious membrane once leak sealing is complete.
Can it be used on non-cementitious surfaces?
No. Gripset C-PLUG is designed for concrete and masonry substrates only. For other materials, select a product formulated for that surface type.
Applications & Benefits
| Application / Use Case | Key Benefit | Primary Trades |
|---|---|---|
| Sealing active water leaks in concrete and masonry | Forms an instant waterproof barrier under pressure in less than 1 minute | Waterproofers, Builders |
| Water tanks and retention structures | Non-toxic and non-staining; safe for potable water storage | Waterproofers, Civil Contractors |
| Basements, cellars, and lift pits | Stops leaks in negative water pressure conditions, preventing structural damage | Waterproofers, Builders |
| Concrete pipes, culverts, and tunnels | Pressure-resistant seals maintain integrity in submerged and high-flow environments | Civil Contractors, Plumbers |
| Wall/floor junction fillets in water-retaining structures | Creates durable 45° coves for enhanced waterproofing membrane performance | Waterproofers, Builders |
| Anchoring bolts, fixtures, and conduits in damp concrete | Provides rapid structural grip even on saturated substrates | Builders, Plumbers, Electrical Contractors |
Applying Gripset C-PLUG: Enhanced Protocols & Best Practices
-
Surface Preparation
Remove loose material, laitance, de-bonded coatings, curing agents, release agents, waxes, oils/grease, moss and grime. Flush with clean water to remove fines and leave the substrate damp (no standing water).
Chasing/Grinding Cracks & Holes
Chase to a minimum 20 mm width and depth with square or dovetail edges. For high-volume leaks, increase depth to ≥40 mm. Avoid V-shaped profiles. Leave a rough mechanical key.
Junctions & Fillets
At wall/floor junctions, chase the joint to at least 20 mm and slightly back into the wall. After sealing, form a ~45° cove ~40 mm wide where required.
Timing: Complete cutting and flushing immediately before mixing to maintain a damp, clean substrate.Pro Tip: Work from the outside toward the centre of larger leak areas to progressively control active water flow. -
Mixing
Mix by hand only to a stiff paste/putty. Prepare small batches you can place within ~1 minute.
Water Ratio & Temperature
As a guide, use ~150 mL of water per 1 kg of powder. Use mixing water at approximately 20 °C to enable correct strength development.
Batch Size & Technique
Limit each batch to about one handful (~0.5 kg). Place powder into a clean pail, add water, and mix quickly with a spatula until uniform. Hold the mix in a gloved hand until warmth or signs of initial set are felt.
Timing: Initial set begins in ~30–60 seconds; final set occurs in ~2–4 minutes.Pro Tip: Do not use electric stirrers or paddle mixers—hand mixing preserves the rapid set profile and correct consistency. -
Placement & Sealing
Press the mixed compound firmly into the opening, maintaining constant hand pressure until initial set.
Active Leak Control
Seat the plug against the direction of water flow. Maintain pressure for ~30–60 seconds until the material locks. Remove your hand gradually.
Large/Open Areas
For larger defects, place multiple small plugs, working outside-in until the area is fully sealed.
Timing: Initial set typically achieved in under 1 minute. Full set in 2–4 minutes.Pro Tip: Keep a second batch staged (dry powder measured) if the leak rate is high so you can mix and place immediately after the first plug sets. -
Curing & Finishing
Once the plug has set, lightly re-dampen to support early hydration, then dress to profile.
Moist Curing
After final set, mist or sponge with clean water for ~15 minutes.
Shaping
When hardened, the plug can be sanded or ground to match existing structural contours.
Timing: Begin light finishing after full set (approx. 2–4 minutes). Delay aggressive grinding until sufficient hardening has developed.Pro Tip: If ambient temperatures are low, expect slower curing. Using slightly warmer mix water can help maintain normal set times. -
Overcoating / System Integration
For long-term dampness and seepage control (negative-side), integrate with the Gripset waterproofing system.
Membrane Overcoat
Once leaks are sealed and the plug has set, overcoat with Gripset C-1P flexible cementitious membrane according to membrane TDS guidance.
Detailing at Junctions
Form the 45° cove before membrane application to reduce stress concentration and improve waterproofing continuity.
Timing: Apply the membrane after the plug has fully set and surface moisture has stabilised.Pro Tip: Plan your sequence so membrane coverage occurs the same day the leaks are controlled to minimise re-wetting risk in subterranean areas. -
Environmental & Application Conditions
Apply to damp (not flooded) cementitious substrates only. Avoid frozen surfaces and remove ice where freezing conditions exist.
Temperature Considerations
Cold ambient conditions slow curing. Slightly warm mix water may help maintain set times. Store product off concrete floors and out of direct sun.
Incompatibilities
Do not use over non-cementitious surfaces or as a sealant/filler for expansion/movement joints.
Timing: Plan short mixing/placement cycles to align with the sub-1-minute initial set.Pro Tip: Stage tools, water, and measured powder within arm’s reach before mixing to execute a continuous placement.
Limitations & Safety
Product Limitations
Not suitable for use over non-cementitious substrates such as metal, plastic, or timber.
Refer to Adheseal sealant or epoxy range for non-cementitious surfaces.
Do not use as a sealant or filler for expansion/movement joints.
Consider Adheseal flexible polyurethane sealants for movement joints.
Not for application over frozen or ice-covered surfaces. Surfaces must be free from ice prior to placement.
Avoid using electric mixers or paddle stirrers—hand mixing is required to achieve correct set times.
Safety & Handling Requirements
Personal Protective Equipment
Wear impervious gloves (e.g., nitrile), safety goggles or face shield, and protective clothing to avoid skin or eye contact. Use a dust mask (P2/P3) during mixing to prevent inhalation of cement dust.
Ventilation Requirements
Use in well-ventilated areas. Although non-toxic and odour-free, cement dust can be harmful if inhaled—ensure adequate airflow, especially in enclosed spaces such as basements or tunnels.
Fire & Handling Precautions
Gripset C-PLUG is non-flammable. Store in sealed pails in a dry environment away from moisture ingress. Avoid storage in direct sunlight or on bare concrete floors to prevent moisture uptake.
Emergency First Aid
Eyes:
Immediately flush with clean water for at least 15 minutes. Seek medical advice if irritation persists.
Skin:
Wash thoroughly with soap and water. Remove contaminated clothing. Seek medical attention if irritation develops.
Inhaled:
Move to fresh air. Seek medical advice if coughing or breathing difficulties occur.
Swallowed:
Rinse mouth. Do not induce vomiting. Seek immediate medical attention.
Seek medical attention immediately in all cases of serious exposure.
Gripset C-PLUG Application Guide
Concrete (Cast-In-Place)
Surface Preparation
Remove loose material, de-bonded coatings, curing agents, waxes, oils/grease, laitance, moss, and grime. Grind or chase cracks/holes to a minimum 20 mm width and depth with square or dovetail edges (avoid V-profiles). Leave a rough mechanical key and flush with clean water to remove fines. Dampen the area prior to application.
Primer Requirements
No primer typically required
Ensure substrate is sound and pre-dampened; avoid standing water. Mix by hand only and place immediately.
Masonry (Brick/Block)
Surface Preparation
Chase leaking joints or cracks to at least 20 mm and square the sides. Remove dust and contaminants, then flush and dampen. Maintain a rough profile for mechanical keying.
Primer Requirements
No primer typically required
Pre-dampen porous masonry to prevent rapid suction and improve bond.
Wall/Floor Junctions (Fillet Creation)
Surface Preparation
Cut out the joint/crack to a minimum 20 mm width, chasing slightly into the wall. Clean thoroughly, flush to remove dust, and dampen. After plugging, form a ~45° cove approx. 40 mm wide where required for water-retaining structures.
Primer Requirements
No primer typically required
Once sealed and set, overcoat with Gripset C-1P for long-term protection against dampness and seepage.
Gripset C-1P (membrane overcoat)Concrete Pipes / Culverts / Tunnels
Surface Preparation
Grind or chase leaking joints/holes to at least 20 mm (increase to ≥40 mm for high-volume leaks). Clean, flush, and dampen before placement. Work from the outside toward the centre on larger areas to control active flow.
Primer Requirements
No primer typically required
After sealing, shape to existing contours; once cured, sanding/grinding is permitted.
Dense / Previously Primed Concrete
Surface Preparation
Remove any release agents, curing compounds, coatings or primers that could inhibit bond. Mechanically roughen to expose sound substrate, flush thoroughly, then dampen before application.
Primer Requirements
No primer typically required
Bond relies on a clean, roughened, pre-dampened surface. Do not apply over incompatible coatings.
Downloads & technical resources
- Choosing a selection results in a full page refresh.