When the project demands robust waterproofing across diverse, challenging environments – from below-ground retaining walls to potable water tanks and continuously wet areas – the choice of membrane is critical. Gripset 2P ensures structures are reliably secured against water ingress, providing a durable, flexible, and fully compliant barrier in critical applications.
Gripset 2P was engineered as a versatile, two-component cementitious membrane to deliver exceptional durability and toughness. It maintains flexible, high-adhesion properties across a broad spectrum of waterproofing applications, including under-tile, immersed, and subterranean environments. This formulation also offers fast-drying capabilities, making it effective even in cooler and humid conditions.
Gripset 2P is a two-component system, consisting of a 10-litre liquid (Part A) and a 15kg powder (Part B). Ensure the liquid is in the mixing pail first, then slowly add the powder while mixing with an electric stirrer and paddle attachment at a slow-medium speed. Continuous mixing ensures a lump-free, homogenous consistency. Allow the mix to settle for 3-5 minutes, then re-stir before application. Always add powder to liquid, never the reverse.
Apply Gripset 2P with a brush, medium-high nap roller, or spray unit. A total of two coats is required to achieve the minimum 1.2mm dry film thickness, corresponding to a coverage of 1.5 litres/m². Apply subsequent coats in different directions. Allow 2-4 hours between coats. The membrane is ready for tiling or toppings after 24 hours, with full immersion resistance achieved in 7 days. Clean-up of wet product is with water; dried material requires mechanical removal.
Gripset 2P consistently functions as the primary waterproofing membrane in various build-ups. In landscaped areas and planter boxes, it typically forms the first critical layer, applied directly to the prepared substrate before drainage layers and soil. For lift pits and retaining walls, Gripset 2P is also often the initial membrane, frequently followed by a polyurethane joint sealant like Adheseal PU25 to detail movement joints or as a final sealant around penetrations. Priming is essential before application; companion products like damp concrete primer or two-part epoxy primer are commonly specified to ensure optimal adhesion over diverse substrates.
Gripset 2P is a flexible, Class II two-component cementitious membrane, designed for its versatility across demanding applications, including continuous immersion and subterranean use. It achieves its robust properties and flexibility through the precise blend of its liquid polymer and cementitious powder components. For applications demanding extreme flexibility or structural movement beyond normal Class II accommodation, such as in areas with high seismic activity or significant dynamic loading, consider specialised high-elongation membranes designed for such conditions. If the project requires a single-component, pre-mixed option for internal wet areas or less demanding external applications, Gripset C-1P offers a convenient, flexible solution.
Yes, Gripset 2P is certified to AS/NZ 4020 – 2018, making it suitable for potable water storage applications and water tanks. This certification confirms it will not contaminate drinking water.
You can re-coat Gripset 2P in 2-4 hours, and it's ready for tiling or toppings in 24 hours. For full flood testing, allow 72 hours, and for continuous immersion, a 7-day cure is required.
No, Gripset 2P is not designed for trafficable surfaces. It also should not be used in areas subject to negative hydrostatic pressure, as this can compromise membrane integrity.
| Application | Key benefit | Primary trades |
|---|---|---|
| Internal wet areas (bathrooms, laundries) | Achieves AS4858 compliance for internal wet areas, providing a durable, flexible waterproof layer under tiles and screeds. | Tilers, Waterproofers, Builders |
| External wet areas (balconies, decks, podiums) | Meets AS4654.1 for external wet areas, resisting continuous water exposure and accommodating normal substrate movement with >200% elongation. | Waterproofers, Builders, Landscapers |
| Potable water tanks and storage facilities | Certified to AS/NZ 4020 – 2018, ensuring water remains safe for human consumption without leaching contaminants. | Plumbers, Tank Manufacturers, Civil Contractors |
| Swimming pools and water features | Withstands continuously immersed environments, offering strong adhesion and a durable, tough membrane that handles static water loads. | Pool Builders, Waterproofers |
| Planter boxes and retaining walls | Provides reliable waterproofing for subterranean and earth-retaining structures, protecting against moisture ingress and maintaining durability. | Landscapers, Builders |
| General tiled areas to prevent moisture ingress | Acts as a Class II membrane, providing a robust barrier against moisture and a compatible surface for direct tile adhesive overlay. | Tilers, Renovators |
Clean, sound and dry substrate; repair defects. Prime to suit: GP (porous), OP (non-porous), XPRESS H2O Plus (green/damp), E60 (residual moisture/rising damp).
Add powder to liquid (1:1 by volume for partial mixes). Mechanically mix to a lump-free, homogenous blend. Rest 3–5 minutes; re-stir before use.
Apply by brush/roller/spray in 2 coats at 1.5 L/m² total, perpendicular directions. Verify with wet film gauge (~750 µm per coat) to achieve ~1.2 mm DFT.
Signal Word: Danger
When handling the Gripset 2P Dry component, wear safety shoes, overalls, chemical-resistant gloves (nitrile rubber recommended for intermittent contact), safety glasses, and a dust mask to prevent inhalation of dust.
Ensure adequate ventilation to maintain air concentrations below occupational exposure standards. Use only in well-ventilated areas or with local exhaust ventilation. Avoid generating and inhaling dust.
Store components in original unopened packaging for up to 12 months in a cool, dry, well-ventilated place, out of direct sunlight. Avoid freezing and cold floors. Keep containers tightly closed when not in use. Dispose of contents and containers in accordance with local regulations.
Proper surface preparation and priming are essential for Gripset 2P to achieve optimal adhesion and long-term performance across various substrates.
Surface prep: Ensure surfaces are cured (concrete 28 days, render/screeds 7 days), clean, sound, and free from contaminants like oil, grease, or laitance. Mechanically remove unsound layers. Fill all defects, voids, and non-structural cracks up to 6mm with a suitable repair mortar or sealant.
Primer: Required. For porous surfaces, use Gripset GP Primer at 1L/8-10m². For non-porous, use Gripset OP Primer at 1L/10m². For damp surfaces with residual moisture, Xpress Primer H2O Plus (1L/8m²) or Gripset E60 (1L/3m² per coat for >80%RH or rising damp) is required.
Surface prep: Surfaces must be sound, dry, and free from dust, dirt, and loose material. All joints and fasteners should be installed to manufacturer specifications and relevant building standards.
Primer: Required. For porous surfaces, use Gripset GP Primer at 1L/8-10m². For non-porous, use Gripset OP Primer at 1L/10m².
Surface prep: Ensure surfaces are clean, dry, and free from dust or loose particles. Address any surface defects before priming and membrane application.
Primer: Required. For porous surfaces, use Gripset GP Primer at 1L/8-10m². For non-porous, use Gripset OP Primer at 1L/10m².
| Property | Value |
|---|---|
| Compliance | AS4858, AS4654.1 (Class II Membrane), AS/NZ 4020-2018 (Potable Water) |
| Appearance (Dry Film) | Light grey |
| Elongation (AS1145.3) | >200% |
| Tensile Strength (AS1145.3) | >1 MPa |
| Water Vapour Transmission (ASTM E96) | 3 g/m²/24 hours |
| Water Absorption (AS 3558.1) | 2% |
| Specific Gravity | 1.3 kg/dm³ |
| Mix Ratio (Volume) | 1:1 powder/liquid (for smaller quantities) |
| Total Yield (from 1 kit) | 20 litres |
| Minimum Film Thickness (Dry) | 1.2 mm (2 coats) |
| Total Coverage (Minimum) | 1.5 litres/m² |
| Pot Life | 1 hour |
| Re-coat Time | 2-4 hours |
| Tiling/Toppings Time | 24 hours |
| Flood Test Time | 72 hours |
| Immersion Time (Full Cure) | 7 days |
| Application Temperature Range | 5°C to 30°C |
| Shelf Life | 12 months (unopened) |
Here are some common examples on where Gripset 2P Class II Membrane used by our customers.
