Delivering robust waterproofing and anti-fracture performance to internal and external floor areas demands a system that handles movement, provides instant sealing, and is ready for tiling. Gripset BRW PFN offers this direct, high-performance solution. It's a self-adhesive butyl rubber sheet membrane designed to integrate seamlessly into hybrid systems, protecting critical floor surfaces from bathrooms to balconies.
This product provides a high-performance, self-adhesive butyl rubber sheet membrane for floor surfaces. Designed as a true hybrid system component, Gripset BRW PFN works alongside Gripset liquid membranes. This approach offers enhanced versatility and functionality over standalone liquid or sheet systems, especially for critical and standard waterproofing applications where anti-fracture properties and instant sealing are essential.
At a consistent 1mm thickness, Gripset BRW PFN provides a reliable, uniform waterproof barrier across the entire floor surface. Its >60% elongation rating, qualifying it as a Class II membrane, ensures robust anti-fracture performance. This movement capability accommodates substrate shifts and thermal expansion, protecting subsequently applied finishes. With a service temperature range from -30°C to 80°C, the membrane maintains its integrity across Australia’s diverse climate zones. Furthermore, it complies with AS 4858 and AS 4654.1, confirming its suitability for internal and external wet area applications.
Gripset BRW PFN is cold-applied and self-adhesive, eliminating the need for torches or heat welding on site. After preparing and priming the substrate with products like Gripset GP Primer, simply unroll and press the membrane into place. For seamless transitions, ensure overlaps are a minimum of 50mm, then coat them with a suitable Gripset liquid membrane. Detailing around pipes and penetrations can be managed with cuts, or by integrating Elastoproof Collars or BRW PF Tape.
This self-adhesive membrane excels in critical floor waterproofing applications, from internal wet areas like bathrooms and laundries to external spaces such as balconies, decks, and podiums. It delivers reliable anti-fracture performance over cracked concrete and other floor substrates, acting as a crucial component in hybrid systems. This makes it ideal for areas requiring robust protection against substrate movement and vibration, ready for direct application of screeds and tiled finishes.
In real-world specifications for balconies, door/window reveals, and flashings, Gripset BRW PFN commonly serves as the primary membrane. It forms the second step in a typical three-step waterproofing build-up. This involves priming with a product like Gripset GP, followed by the application of BRW PFN often in conjunction with Gripset 38FC Waterproofing Membrane for a hybrid approach, before a final seal such as Adheseal S100. This sequence ensures a continuous and high-performance waterproof barrier.
While Gripset BRW PF Tape Primer provides a robust, self-adhesive sheet membrane solution, Gripset BRW PFN distinguishes itself as a dedicated hybrid system component. BRW PFN is specifically engineered to work in conjunction with Gripset liquid membranes, enhancing overall system performance and offering superior versatility for complex floor waterproofing applications. This allows for a combined approach that leverages the strengths of both sheet and liquid technologies.
Yes, Gripset BRW PFN is designed to accommodate movement. Its butyl rubber composition provides anti-fracture properties, excellent vibration resistance, and >60% elongation, helping prevent cracking in finished surfaces over moving substrates.
No, Gripset BRW PFN is for floor and horizontal surfaces only. It is not rated for vertical applications, must be finished over with screed or tiles, and is not designed as an exposed or trafficable membrane.
Gripset BRW PFN passes AS 4858 for internal wet areas and AS 4654.1 for external wet areas. This compliance confirms its suitability for certified waterproofing installations in Australian wet area floor applications.
Priming is required for most porous and absorbent surfaces like concrete or screed. However, non-porous, non-mineral surfaces such as metals, plastics, and glazed tiles typically do not require priming if they are clean and sound.
| Application | Key benefit | Primary trades |
|---|---|---|
| Internal wet area floors (bathrooms, laundries) | Compliant waterproofing to AS 4858. Reduces water ingress risk in critical areas. | Waterproofers, tilers |
| External wet area floors (balconies, decks, podiums) | High-performance waterproofing to AS 4654.1. Resists vibration and flexing from environmental movement. | Waterproofers, builders |
| Anti-fracture system over cracked concrete and screeds | Bridges non-structural cracks and accommodates substrate movement with >60% elongation, preventing tile failure. | Tilers, concrete repairers |
| Hybrid system detailing with liquid membranes | Integrates with Gripset liquid membranes for robust detailing around penetrations and junctions, offering a versatile system. | Waterproofers, plumbers |
Clean substrate of all dust, debris, oil, or laitance. Remove loose particles and ensure surface is smooth and dry. Repair voids or cracks if present.
Apply Gripset GP Primer to porous or dusty substrates. Allow primer to dry completely (typically 20–40 minutes) before laying membrane.
Unroll PFN and cut to length. Position fleece side upward. Peel back 300–500mm of release film, align sheet, and press down with firm pressure. Gradually peel and apply in sections, smoothing as you go.
Vinyl hand roller or flat trowel to eliminate air pockets.
Overlap sheets by 50mm at sides. For end joints or internal corners, use Gripset BRW FG Tape. Ensure full contact by rolling all overlaps firmly. Detail around drains and fixtures using fleece-backed tape or BRW TAPE.
Store rolls upright vertically at room temperature in dry internal conditions. The product's properties are not affected by frost or cold. Use within 12 months of purchase for best results. Refer to the Safety Data Sheet (SDS) for detailed disposal instructions.
Proper surface preparation and priming are critical for ensuring optimal adhesion and long-term performance of the Gripset BRW PFN membrane.
Surface prep: Surfaces must be clean, sound, smooth, dry, and free from all contaminants like dirt, oil, wax, or laitance. Mechanically remove structurally unsound layers. Concrete requires 28 days cure, and cement render/screeds 7 days minimum.
Primer: Required. For porous surfaces, apply Gripset GP Primer at 1 litre per 8-10m². For green, damp, or external floor applications, use Gripset E60 at 1 litre per 3m² per coat for 1-2 coats.
Surface prep: Ensure surfaces are clean, sound, smooth, and dry, free from loose materials or contaminants.
Primer: Required. Apply Gripset GP Primer at 1 litre per 8-10m².
Surface prep: Surfaces must be clean, sound, and suitably prepared. Remove all oils, grease, and other residues. For existing epoxy coatings, ensure compatibility and a clean surface.
Primer: Optional. Priming is generally not required for clean, sound, non-porous, non-mineral based surfaces. If priming is deemed necessary, apply Gripset OP Primer at 1 litre per 12m².
| Property | Value |
|---|---|
| Colour Material | White face fabric, Grey butyl backing |
| Thickness | 1mm |
| Specific Weight | 1.55 g/cm³ |
| Tensile Strength | >2 MPa (AS 4654.1 Appendix A) |
| Elongation | >60% (AS1145.3) |
| Membrane Class | Class II |
| Water Vapour Transmission | 0.1 g.24h/m² (ASTM E96 Desiccant method) |
| Water Absorption | 1.5% (AS 3558.1) |
| Service Temperature | -30°C to 80°C |
| Compliance AS4858 | PASS |
| Compliance AS 4654.1 | PASS |
Here are some common examples on where Gripset BRW PFN used by our customers.
