Pool System Build-Up
- 1 Concrete Substrate
- 2 Crack Repair (if required)
- 3 ACTFLEX FLEXPLUS
- 4 ACTFLEX HYDROPLUG
- 5 ACTFLEX AT MESH
- 6 ACTFLEX 988 CWP (2 Coats)
- 7 Tile Adhesive
- 8 Pool Finish
ACTFLEX HYDROPLUG Rapid-Setting Non-Shrink Leak Stopper
or 4 interest-free payments with
Stops running water in minutes. Mix with water, press it in by hand, hand-set in 2 to 4 minutes.
ACTFLEX HYDROPLUG is a rapid-setting, non-shrink plugging cement for stopping active leaks under pressure in concrete and masonry. Mix it to a putty with clean water, press it into the crack against the flow, and it sets with water running through.
Where to use it
- Active leaks in water tanks and retention structures
- Basements, underground car parks, lift shafts and lift pits
- Wall and floor junctions in water-retaining structures within the ACTFLEX 988 CWP system
- Penetrations and pipe entries before ACTFLEX FLEXIPLUG detailing
Why waterproofers buy it
- Stops active leaks and flowing water, even under high pressure
- Hand-set in 2 to 4 minutes, final solidification within 10
- Non-shrink. 4.5 MPa or more at 1 hour, 15.0 MPa or more at 3 days
- Osmotic pressure resistance 1.5 MPa or more at 7 days, about 150 m head of water
- Single component, just add clean water
- 5 kg and 20 kg pails. 10 year Forspec product warranty
Coverage
20 x 20 mm chase: approximately 0.8 kg/m, about 6 m per 5 kg pail or 25 m per 20 kg pail. Spot plug (20 mm hole, 40 mm deep): about 25 g, 200 plugs per 5 kg pail.
Not for
Expansion or movement joints (use ACTFLEX FLEXIPLUG), non-cementitious surfaces, below 5°C or above 35°C, frozen substrates, prolonged UV, or use as a stand-alone membrane. No AS/NZS 4020 drinking-water approval.
All times at 25°C and 50% RH.
Instantly stops active water leaks and flowing water, even under high pressure
Hand-set within 2 to 4 minutes, final solidification within 10
Non-shrink and non-corrosive, so it does not affect steel reinforcement
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Pickup available at The Waterproofing Shop
Usually ready in 24 hours
ACTFLEX HYDROPLUG Rapid-Setting Non-Shrink Leak Stopper
5 KG
The Waterproofing Shop
22/872 Canterbury Road
Roselands NSW 2196
Australia
Product Details
How to Use
Technical Specifications
ACTFLEX HYDROPLUG Rapid-Setting Non-Shrink Leak Stopper
Sale price$61.00
Frequently bought together
System Build-Up Guide
Correct application makes all the difference.
Retaining Wall System Build-Up
- 1 Concrete Substrate
- 2 Crack Repair (if required)
- 3 ACTFLEX MS PRO
- 4 ACTFLEX AT MESH
- 5 ACTFLEX 988 CWP (2 Coats)
- 6 Protection Board (Optional)
- 7 Drainage System
- 8 Backfill
Tank System Build-Up
- 1 Concrete Substrate
- 2 Crack Repair (if required)
- 3 ACTFLEX FLEXPLUS
- 4 ACTFLEX AT MESH
- 5 ACTFLEX 988 WMP (2 Coats)
- 6 Protective Coating (Optional)
- 7 Water
Technical overview
Key applications
- Stopping active leaks in water tanks and retention structures
- Basements, underground car parks, lift shafts and lift pits
- Concrete pipes, tunnels, power stations and sewer systems
- Joint sealing between concrete segments - pipes, culverts, tunnels and mines
- Wall and floor junction water-stopping in water-retaining structures, within the ACTFLEX 988 CWP system
- Sealing around penetrations, pipe entries and fittings ahead of ACTFLEX FLEXIPLUG detailing
- Rapid anchoring of bolts, pipes, conduits and sanitary fittings
Surface suitability
- Concrete (clean, sound and damp, never frozen or frosted)
- Masonry (clean, sound and damp, never frozen or frosted)
- Cementitious substrates only, ground out to a minimum depth and width of 20 mm, or 40 mm for high-volume leaks
- Square-cut or dovetailed openings for mechanical key, never a V profile
Not for expansion or movement joints - moving details are the role of ACTFLEX FLEXIPLUG, per its TDS. Cementitious substrates only, never on non-cementitious surfaces. Never apply below +5C or above +35C, and never over frozen or frosted substrates. The 150 mL per kg water ratio is critical, and deviation affects setting time, strength and bond. Requires a clean, sound, damp substrate and is unsuitable over oil, grease or bond-breaking contamination. No heavy loads or restored water pressure before the plug has fully cured. Not for prolonged direct UV exposure - over-coat with the specified FORSPEC membrane system. It is a rapid water-stop and repair compound, not a stand-alone waterproofing membrane: permanent waterproofing is completed with ACTFLEX 988 CWP or the specified FORSPEC membrane. The product holds no AS/NZS 4020 drinking-water approval. It is classified a HAZARDOUS CHEMICAL, signal word DANGER: the powder contains portland cement at over 60% and becomes strongly alkaline when wet, and because it is worked by hand, impermeable gloves are mandatory at every step with no bare-skin contact with the putty at any time.
Calculate your coverage
You will need:
ACTFLEX HYDROPLUG Rapid-Setting Non-Shrink Leak Stopper
5kg kit
0 Kits
Total coverage: 0 m²
This is an estimate only. Add 10% for wastage.
Technical Specifications
| Product Type | Single-component, rapid-setting, non-shrink cementitious plugging compound |
| Appearance | Uniform grey powder - no impurities, no agglomerates |
| Water Addition | 150 mL per 1 kg of powder, mixed to a putty consistency |
| Batch Size | Approx. 0.5 kg per batch, mixed by hand, spatula only |
| Hand-Set | 2-4 minutes after placement* |
| Initial Solidification | Within 5 minutes* |
| Final Solidification | Within 10 minutes* |
| Compressive Strength | 4.5 MPa minimum at 1 hour; 15.0 MPa minimum at 3 days* |
| Flexural Strength | 1.5 MPa minimum at 1 hour; 4.0 MPa minimum at 3 days* |
| Osmotic Pressure Resistance | 1.5 MPa minimum at 7 days, equivalent to approx. 150 m head of water* |
| Bond Strength | 0.6 MPa minimum at 7 days* |
| Heat Resistance | 100C for 5 hours, no cracking, peeling or spalling* |
| Freeze-Thaw Resistance | 20 cycles, no cracking, peeling or spalling* |
| Placed Density | Approx. 2.2 kg/L, yield approx. 0.50 L per kg of powder* |
| Application Temperature | +5C to +35C, ambient and substrate |
| Packaging | 5 kg and 20 kg pails |
| Shelf Life | 12 months, unopened, sealed pails stored dry* |
| Drinking Water Approval | None held - no AS/NZS 4020 approval; potable-water applications require written FORSPEC confirmation |
| Hazard Classification | HAZARDOUS CHEMICAL (non-dangerous goods), signal word DANGER, SDS Chemwatch 7949-70 |
| * Manufacturer index values - no accredited test reports exist for this product | |
Real Projects. Real Results.
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Before
After
Pool Renovation
Gold Coast, QLD
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Before
After
Below Ground Retaining Wall
Sydney, NSW
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Before
After
Concrete Water Tank
Perth, WA
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After
Commercial Podium
Melbourne, VIC
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Before After
Swimming Pool Construction
Brisbane, QLD
Watch the install
Step-by-step from prep to top coat. Filmed on the tools, not in a studio.
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Frequently asked questions
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What is ACTFLEX HYDROPLUG used for?
CompatibilityHYDROPLUG instantly stops active water leaks under pressure in concrete and masonry - basements, water tanks, tunnels, lift shafts, foundations. Used when water is actively flowing and you need to stop the leak immediately to apply permanent waterproofing.
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How fast does it set?
PerformanceHYDROPLUG sets in 1-2 minutes initial set, fully waterproof in 5-10 minutes. Full strength cure in 24 hours. Once cured, it achieves greater than 40 MPa compressive strength at 28 days - structural-grade repair.
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How is it applied to an active leak?
InstallationMix the powder with water to a stiff putty consistency, then press firmly into the leak with gloved hands and hold for 30-60 seconds until the material sets and the water flow stops. Apply in 2-50mm thick layers.
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Is it safe for potable water?
CompatibilityYes. HYDROPLUG is non-toxic and approved for potable water contact - safe for drinking water tank repairs. Non-corrosive to rebar, sandable after cure, and won't shrink as it sets.
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Service temperature range?
ComplianceService temperature -20°C to +80°C once cured. Bond strength to concrete exceeds 2.0 MPa, often pulling out parent concrete in failure tests - structural-grade plug for serious leak situations.