For sealing leak control flanges, waste outlets, and joint intersections before waterproofing, Gripset BRW PF Square provides an instant moisture seal. This self-adhesive butyl rubber square sticks directly to the substrate and can be tiled, rendered, or coated over immediately, eliminating the drying time required by liquid detailing compounds.
The square utilises a high-tack butyl rubber backing combined with a fabric face. The butyl layer deforms around penetrations, PVC pipes, and metal flashings to absorb vibration and substrate flexing without rupturing. The fabric-faced top layer is compatible with cement-based finishes, tile adhesives, renders, and Gripset liquid waterproofing membranes, allowing you to maintain system continuity across the joint or flange.
On clean, stable, and dust-free non-porous surfaces like glazed tiles, PVC, metals, and dense concrete, BRW PF Square can be applied without a primer. Highly porous or dusty substrates must be primed first using Gripset GP, E60, or Xpress H20 Primer Plus.
To install, peel away the release paper from the butyl backing and press the square into place using a spatula, sponge, or cloth to eliminate air pockets. When sealing puddle flanges, cut an aperture in the centre of the square with a sharp knife to expose the waste pipe before applying your waterproofing membrane or tile adhesive.
No, Gripset BRW PF Squares cannot be applied directly over damp surfaces. Any dampness or residual moisture must first be sealed with a suitable vapour barrier primer, such as Gripset E60, before application.
No, finishes can be applied immediately after the Squares are pressed into place. Their butyl rubber backing provides an instant seal, eliminating drying or curing downtime.
Apply Gripset BRW PF Squares when the surface temperature is between 0°C and 45°C. Avoid application outside this range to ensure optimal adhesion and performance.
No, Gripset BRW PF Squares are not designed for exposed applications. They must be finished over with a surface covering, such as a Gripset liquid membrane, tile adhesive, or render, in all external uses.
| Application | Key benefit | Primary trades |
|---|---|---|
| Sealing puddle flanges and penetrations | Instant, reliable seal against moisture ingress and vibration, ready for immediate over-coating. | Waterproofers, Plumbers, Tilers |
| Sealing joint intersections (internal/external) | Provides a flexible, 0.8mm thick detail layer that maintains adhesion with 70% elongation at break, compatible with subsequent membranes. | Waterproofers, Tilers, Builders |
| Detailing over plumbing pipes, PVC, flashings | Easy workability and deformability to intricate shapes, ensuring a continuous waterproofing layer around critical elements. | Plumbers, Roofers, Waterproofers |
| Patching pin holes and pitted areas on metal surfaces | Offers a quick, solvent-free repair with high peel adhesion (>80 N) for roofing and guttering, preventing immediate leaks. | Roofers, General Maintenance |
| Bond breaker reinforcement | Acts as a flexible interface to accommodate minor movement, protecting the integrity of the overlying waterproofing system. | Waterproofers, Tilers |
Ensure all substrates are clean, sound, smooth, dry, and free of contaminants such as dust, oil, grease, wax, laitance, release agents, coatings, moss, and algae. Remove structurally unsound layers mechanically and repair voids or cracks with appropriate Gripset repair mortars.
Use grinding, abrasive blasting, or sanding to remove stubborn coatings or contaminants.
Vacuum or brush thoroughly; seal porous or dusty substrates with Gripset GP, E60, or XPRESS H20 PRIMER PLUS.
Remove the release paper from the butyl rubber side. Position the square with the fabric face upwards, aligning to fully cover the intended detailing area.
Before removing the backing, dry-position the square to confirm fit and alignment, especially over flanges or penetrations.
Using a sharp knife, cut an aperture in the centre to fit around pipes, puddle flanges, or other penetrations.
Press the square into place using a spatula, sponge, or cloth, working from the centre outwards to eliminate air pockets and creases. Ensure full contact between the butyl layer and the substrate.
Apply even pressure across the entire square to maximise adhesion.
Check that all edges are firmly bonded; re-press if any lifting occurs.
Apply Gripset membranes, adhesives, renders, mortars, coatings, or screeds directly over the fabric face. Ensure overlap and integration with adjacent waterproofing or finishes.
Feather membrane over the square to blend with the surrounding area and avoid ridges.
Key finish into fabric face for maximum bond strength.
Gripset BRW PF Squares are classified as non-hazardous and non-dangerous goods. However, general precautions should be observed during handling.
Wear safety shoes and gloves for general handling. Always wash hands before eating, drinking, or smoking.
Store in a cool, dry, well-ventilated area, out of direct sunlight and away from foodstuffs. Keep containers closed and upright. Product properties remain unchanged if stored correctly within 12 months of purchase. Dispose of material and containers according to local regulations.
Proper substrate preparation is crucial for ensuring optimal adhesion and long-term performance of Gripset BRW PF Squares, preventing detailing failures.
Surface prep: Surfaces must be sound, smooth, dry, and free of contaminants. Mechanically remove unsound layers. Concrete requires a minimum 28-day cure, while cement renders and screeds need at least 7 days to cure before application.
Primer: Optional for dense, non-porous concrete. For highly porous surfaces, or those with surface dust, prime with Gripset GP, E60, or XPRESS H20 PRIMER PLUS. If residual moisture or rising damp is present, Gripset E60 must be used to seal the substrate first.
Surface prep: Ensure surfaces are clean, sound, dry, and free from loose material, dust, oil, grease, wax, and other contaminants. Smooth any defects like voids or pitted sections. Building surfaces must be fit for purpose and installed to Australian Standards.
Primer: Generally not required over dense, non-porous surfaces. For any porous or dusty surfaces, prime with Gripset GP, E60, or XPRESS H20 PRIMER PLUS to ensure robust adhesion.
| Property | Value |
|---|---|
| Colour | White face; butyl backing grey |
| Thickness | 0.8mm |
| Solids | 100% |
| Specific Weight | 1.45 g/cm³ |
| Elongation At Break (EN 12311-1) | 70% longitudinal and transverse directions |
| Tensile Strength (EN 12311-1) | >100N longitudinal & transverse directions |
| Peel Adhesion (ASTM D1000) | >80N |
| Loop Tack Test (ASTM D6195) | >70N |
| Vertical Flow (ISO 7390) | <10mm |
| Cement Adhesion Strength (EN 12004 – EN1348) | 1.0N/mm² (with Gripset C-Bond Adhesive) |
| Application Temperature | 0ºC to 45ºC |
| Service Temperature | -40ºC to 100ºC |
| Shelf Life | 12 months |
Here are some common examples on where Gripset BRW PF Square used by our customers.
