For external applications like exposed roofs, balconies, and decks, you need a waterproof membrane that isn't just compliant, but genuinely robust. This is where Everflex WPUV UV-Stable Waterproofing Membrane / HVUV delivers. It's specifically engineered for harsh UV exposure, providing the critical 1.3mm dry film thickness demanded by demanding conditions. Ensure long-term performance where the elements hit hardest.
Everflex WPUV / HVUV is a premium grade, single-component, self-reinforced elastomeric waterproof membrane. We formulated it specifically for UV-exposed external applications. While it meets Class III standards for internal wet areas, its core strength lies in providing a durable, flexible, and seamless barrier for demanding outdoor environments. It's tested to NCC AS-4858:2004 and AS4654.1 standards, ensuring it performs under direct sun, traffic, and structural movement, without re-emulsifying when immersed.
At its heart, Everflex WPUV / HVUV provides a Class III elastomeric membrane, offering high permanent flexibility. This isn't just a compliance number; it means the membrane tolerates structural movement common in large external areas like roof decks, preventing cracking and failure. For external, UV-exposed applications, apply a minimum 1.3mm dry film thickness. This enhanced build provides the necessary material for robust, long-term performance under harsh environmental conditions, preventing premature failure. A low VOC content of less than 2 g/L means it meets Green Star environmental criteria, supporting healthier environments in compliance-driven projects. The service temperature range from -40°C to +80°C confirms its suitability for Australia's extreme climate variations, from alpine conditions to intense summer heat.
Everflex WPUV / HVUV is a ready-to-use, single-pack system. For optimal adhesion, always prime the substrate. For external applications, use Everflex VBS Bitumen Primer as your primer; for internal use, Everflex WBP is typically sufficient. Apply the membrane within 2-24 hours once the primer is touch-dry. Apply two coats, each at approximately 0.75mm wet film thickness, with the second coat at right angles to the first. Verify wet film thickness with a film gauge. Recoat time is 2-4 hours after touch-dry, allowing for efficient application. Clean tools and spills with water while the product is wet; cured material requires mechanical removal. Allow approximately 48 hours cure time before tiling.
This membrane is specifically formulated for areas that demand superior protection against the elements and heavy-duty use:
In external waterproofing systems, Everflex WPUV / HVUV typically acts as the primary membrane. After proper substrate preparation and priming (use Everflex VBS for external surfaces), apply the membrane. For waste outlets, penetrations, and waterstops, seal all gaps and perimeters with Adheseal Hi-Flex MS sealant. For internal corners and sheet joints, apply a suitable bond breaker or fillet of Hi-Flex MS. Where dynamic cracks or expansion joints are present, reinforce with Adheseal Elastoband or Butyl Tape systems. For extra protection and slip resistance on exposed surfaces, consider a topcoat of LS slip-resistant UV protective coating.
Everflex WPUV / HVUV is a versatile membrane designed to perform in varied conditions, but its application requirements adapt to the specific environment. While it delivers excellent internal wet area waterproofing at a 1.0mm dry film thickness, its formulation truly shines in external, UV-exposed settings. Here, we specify a minimum 1.3mm dry film thickness. This increased material build is critical for withstanding the harsher environmental demands of direct sunlight, temperature fluctuations, and foot traffic. This distinction ensures you achieve the appropriate protection and long-term durability for your specific application, without needing a different product formulation.
Yes, Everflex WPUV is specifically formulated for UV exposed applications. It is tested to AS4654.1 and AS4858 standards, making it suitable for exposed roofs, decks, and balconies, and will not re-emulsify.
A minimum dry film thickness (DFT) of 1mm is required for internal areas. For external applications, a minimum DFT of 1.3mm is necessary to ensure adequate waterproofing performance.
No, do not apply Everflex WPUV on damp, wet, or contaminated substrates. The substrate must be free from surface water and continual dampness to ensure proper adhesion and long-term performance.
Priming is always recommended, especially on porous or warm surfaces. For internal applications, Everflex WBP is typically used, while Everflex VBS is recommended for external areas like roof decks and balconies.
| Application | Key benefit | Primary trades |
|---|---|---|
| Exposed roofs and under pedestal systems | UV stability and Class 3 flexibility for long-term outdoor performance, resists re-emulsification | Waterproofers, Roofers, Builders |
| Balconies, patios, decks, and terraces | Compliant to AS4654.1 for external exposed areas, withstands maintenance foot traffic, tile-friendly | Tilers, Waterproofers, Builders |
| Internal wet areas like showers, laundries, toilets, kitchens | AS4858 compliant Class 3 membrane, rapid drying for earlier tiling, low VOC for Green Star projects | Tilers, Waterproofers, Plumbers |
| Waterproofing various building materials (concrete, timber, cement sheet) | High permanent flexibility and strong adhesion across common building substrates, forms a seamless barrier | Builders, Waterproofers, Renovators |
Ensure all surfaces are structurally sound, dry, clean, and free from oils, form release agents, laitance, and any contaminants. Fill holes and non-structural cracks with Hi-Flex MS or suitable filler.
Allow concrete to cure for 28 days minimum. Screeds must cure for at least 4 days. Surface must be dust-free and level.
Timber and sheeting must be securely fixed with no movement. Joints should be sealed and internal corners filleted with Hi-Flex MS.
Select the correct primer based on the substrate type and environmental exposure. Apply using brush or roller.
Recommended for internal applications and timber surfaces. Allow to dry until touch-dry before applying membrane.
Required for external areas like balconies, roof decks, and pedestal systems. Provides superior bond and vapour barrier.
Mix Everflex HVUV thoroughly before use. Apply with brush or roller in two coats — each perpendicular to the last — to achieve the correct film build.
Apply at 0.75mm wet film thickness. Use a wet film gauge to verify. Allow to dry before recoating.
Apply at right angles to first coat, also at 0.75mm wet film. Ensure minimum dry film thickness of 1.3mm is achieved for external use.
Seal penetrations, puddle flanges, and terminations with Hi-Flex MS. For enhanced protection, especially in exposed areas, apply an optional UV slip-resistant topcoat (e.g., LS UV Coat).
Use Hi-Flex MS sealant and install fillet beads where required. Ensure all outlets are recessed and membrane-lapped correctly.
Apply LS UV Slip Coat for long-term durability and added resistance to wear from maintenance traffic or harsh weather.
Causes mild skin irritation. Causes eye irritation.
Wear gloves (Nitrile Rubber is suggested for intermittent contact), apron, safety glasses, and a respirator. If an inhalation risk exists, wear an organic vapour/particulate respirator meeting AS/NZS 1715 and AS/NZS 1716 requirements.
Ensure adequate ventilation to maintain air concentrations below exposure standards. Use in well-ventilated areas with local exhaust ventilation.
Store in a cool, dry, well-ventilated place, out of direct sunlight, between +10°C and +35°C. Keep containers upright and closed. Minimum shelf life is 12 months from date of manufacture. Dispose of material and containers in accordance with local regulations.
Proper surface preparation and priming are critical for the long-term adhesion and performance of any waterproofing membrane. This guide outlines requirements for common substrates.
Surface prep: Concrete must be structurally sound, dry, and clean. Allow a minimum 28-day curing period. Ensure surfaces are free from dust, loose material, oils, grease, form release agents, curing compounds, and any protrusions.
Primer: Recommended. Use Everflex WBP for internal areas or Everflex VBS for external applications. Apply once touch-dry and within 2-24 hours.
Surface prep: Screeds must be a 3:1 ratio and structurally sound, dry, and clean. Ensure surfaces are free from dust, loose material, oils, grease, and any protrusions.
Primer: Recommended. Use Everflex WBP for internal areas or Everflex VBS for external applications. Apply once touch-dry and within 2-24 hours.
Surface prep: Masonry and render must be structurally sound, dry, and clean. Allow a minimum 4-day curing period for render. Ensure surfaces are free from dust, loose material, oils, grease, and any protrusions.
Primer: Recommended. Use Everflex WBP for internal areas or Everflex VBS for external applications. Apply once touch-dry and within 2-24 hours.
Surface prep: Substrates must be structurally sound, dry, and clean. Ensure surfaces are free from dust, loose material, and any protrusions. Rectify non-structural cracks or deformities.
Primer: Recommended. Use Everflex WBP for internal areas or Everflex VBS for external applications. Apply once touch-dry and within 2-24 hours.
| Property | Value |
|---|---|
| Type Of Product | Elastomeric Waterproof Membrane |
| Density | 1.24 g/cm³ |
| Consistency | Thick Liquid |
| Class | Class III Elastomeric liquid applied membrane |
| VOC | <2 g/L (Greenstar Compliant) |
| Clean Up | Water while wet |
| Storage Temperature Range | +10°C to +35°C |
| Application Temperature Range | +10°C to +35°C |
| Service Temperature Range | -40°C to +80°C |
| Coverage Internal (1mm DFT) | 1.5 L/m² |
| Minimum Dry Film Thickness Internal | 1mm |
| Minimum Dry Film Thickness External | 1.3mm |
| Recoat Time At 25°C | 2-4 hours after touch dry |
| Final Drying Time At 25°C | 48 hours |
| Shelf Life | Minimum 12 months from DOM |
| Colours | Light Grey |
| Test Certificates | AS4858:2004, AS4654.1:2012 |
| Permeability | 2.2 g/m²/24h |
| pH | 8-9 |
Here are some common examples on where Everflex HVUV Elastomeric Waterproof Membrane used by our customers.
