Get the waterproofing right the first time, every time, beneath your tiles. Everflex WPM provides the permanent flexibility and durability required to secure all internal and external wet areas. This compliant, self-reinforced, elastomeric membrane creates a seamless, fully bonded barrier that won't re-emulsify. Install it with confidence, knowing the finished surface will remain protected for the long term.
Everflex WPM was formulated as a premium-grade, self-reinforced elastomeric membrane to meet rigorous Class 3 waterproofing specifications for under-tile applications. Its design ensures high permanent flexibility, durability, and a fully bonded, seamless barrier that maintains integrity even when immersed. This means peace of mind for you, knowing the membrane beneath your tiles won't fail when exposed to water.
Everflex WPM is a single-component, ready-to-use liquid membrane. Mix it thoroughly before application. Apply with a brush or roller in two coats. The first coat should achieve approximately 0.75mm wet film thickness, followed by a second coat applied at right angles to the first, also at 0.75mm wet film thickness. Verify the wet film thickness with a film gauge to ensure compliance. Recoat times are typically 2-4 hours after touch-dry, allowing for rapid job completion. For internal applications, prime with Everflex WBP. For external areas like roof decks, use Everflex VBS. While wet, clean tools and spills easily with water.
Everflex WPM is applied as the primary waterproof membrane in a multi-stage system, typically after substrate preparation and priming. You will prime porous or warm surfaces with a compatible primer, such as Everflex WBP for internal use, or Everflex VBS for external applications like roof decks and balconies. Once the primer is touch-dry, Everflex WPM is applied in two coats to achieve the required dry film thickness. For critical areas like waste outlets, penetrations, and corners, Adheseal PU or Hi-Flex MS sealants are used to fill gaps and perimeters. Adheseal Elastoband or Butyl Tape systems are recommended for dynamic cracks and expansion joints, as the membrane itself cannot span these larger movements. Once cured, Everflex WPM is compatible with a wide range of solvent-free tile adhesives, including RLA C-Lite and Gripset Unigrip, ready for your final tile finish.
Yes, Everflex WPM is certified for external under-tile applications like balconies. It forms a durable, seamless barrier when correctly installed and tiled over to prevent UV exposure.
No, Everflex WPM has limited UV resistance and must be tiled or topped. It is not designed for long-term direct sunlight exposure as an exposed membrane.
Yes, it is tested to NCC, AS-4858:2004 (Class III), and AS4654.1:2012 standards. This confirms compliance for both internal and external under-tile applications.
A primer is always recommended for adhesion, particularly on porous and warm surfaces. Use Everflex WBP for internal applications or Everflex VBS for external areas like roof decks and balconies. Always refer to the primer's TDS for specific application instructions.
| Application | Key benefit | Primary trades |
|---|---|---|
| Shower recesses & internal wet areas | Certified to AS4858 Class III (391% elongation), forming a seamless, flexible barrier that does not re-emulsify. | Tilers, Waterproofers, Builders |
| External balconies & patios (under tile) | Complies with AS4654.1 for external under-tile use, providing reliable protection against water ingress. | Waterproofers, Builders |
| Waterproofing over timber floors | Low permeability protects structural timber from moisture, while Class III flexibility accommodates substrate movement. | Tilers, Waterproofers |
| Commercial kitchens & laundries (under tile) | Inhibits mould, low VOC (<1g/L) supports Green Star criteria, durable against water exposure for demanding environments. | Builders, Waterproofers |
| Under-tile application requiring fast turnaround | Rapid drying time (48 hours before tiling at 25°C/50% humidity) allows for quicker project completion. | Tilers, Builders |
Application
Surface preparation:
All surfaces must be structurally sound, stable, dry, clean, and free of dust, loose, flaking, friable material and free from oils, grease, form release agents, curing compounds, and any other surface contamination that may hinder adhesion. Ensure that surfaces are free of protrusions to achieve a continuous, even film build. Removal of sharp edges and ridges, chamfer external corners 12mm. Non-structural cracks, holes, and deformities are to be rectified. Substrate must be free from surface water and continual dampness. Concrete must be allowed to cure for at least 28 days.
Screed and render:
A 3:1 ratio sand and cement screed, or Gripset C-Bed engineered screed is recommended if falls need to be created prior to membrane application. Sand cement screeds and cement render must be allowed to cure for at least 4 days prior to the application of primers. Failure to do so may result in poor adhesion and subsequent delamination.
Priming:
The use of a primer is always recommended, particularly on porous and warm surfaces. For internal applications, Everflex WBP is typically sufficient, while for external applications like Roof Terraces and Balconies, Everflex VBS is advised. Refer to the primer Technical Data Sheet (TDS) to ensure you have the appropriate primer for your application and apply it in accordance with the primer’s TDS. Once the primer is touch-dry, apply Everflex WPM within 24 hours; times vary depending on atmospheric conditions. Metal surfaces: a metal etch with either VBS or OP primer. For other non-porous surfaces, OP primer is normally sufficient.
Everflex WPM Installation:
Please note that installation of the WPM waterproof system must be strictly in accordance with the requirements as detailed in the National Construction Code.
Before use, mix Everflex WPM thoroughly. Using a brush and or roller, apply the first coat of product to achieve an even and consistent coat of approximately 0.75mm wet film thickness. Once the first coat has dried, apply a second coat at a right angle to the first coat at 0.75mm wet film thickness. Verify wet film thickness with a film thickness gauge. Everflex WPM must be applied with a minimum of two coats, achieving a minimum dry film thickness (DFT) of 1mm. The average recoat time is 2-4 hours after being dry to the touch, and within 24 hours, at 25˚C and 50% humidity. These times vary depending on atmospheric conditions. If more than 2 coats are required to achieve the minimum DFT, apply additional coats at right angles to the previous until the correct DFT is achieved.
Waste Outlets, Penetrations and Angles
Waste Outlets:
Floor wastes and puddle flanges should be rebated into the floor to allow water to readily drain. Fill all gaps and perimeters with Adheseal PU or Hi-Flex MS sealant.
Waterstops:
Where required by the NCC, including door barriers, balcony edge trims or shower waterstops, they should be sealed and secured with Adheseal PU or Hi-Flex MS sealant.
Gaps, Joints and Transitions:
Apply a fillet forming a cove, with Adheseal PU, Hi-Flex MS sealant or suitable bond breaker to internal corners and over sheet joints, bond breaker to be 12mm for wet areas, 38mm for external above-ground gaps, joints and internal corners. For additional protection, apply polyester reinforcing fabric to the corners and joints saturated into the first coat of membrane. For dynamic cracks/expansion joints and control joints, the use of Adheseal Elastoproof is recommended. For any further guidance, please contact the Adheseal Technical Department.
Wear overalls, safety shoes, safety glasses, and impervious gloves. Nitrile rubber gloves are suggested for intermittent contact.
Use only in well-ventilated areas. Natural ventilation is adequate under normal conditions. Keep containers closed when not in use.
Store in a cool, dry, well-ventilated place out of direct sunlight, between +10°C and +35°C. Keep containers closed. Shelf life is a minimum of 12 months from the date of manufacture. Dispose of according to State/Territory Land Waste Management Authority regulations.
Proper surface preparation is crucial for Everflex WPM adhesion and long-term performance. All surfaces must be structurally sound, dry, and free of contaminants.
Surface prep: Ensure concrete has cured for at least 28 days. The surface must be clean, dry, free from form release agents, curing compounds, and any other surface contamination. Rectify non-structural cracks and deformities.
Primer: Recommended. For internal use, Everflex WBP is typically suitable. For external applications, Everflex VBS is recommended. Apply according to the primer's TDS.
Surface prep: Sand cement screeds should be a 3:1 ratio. Render must cure for at least 4 days. Surfaces must be dry, stable, and free of dust or friable material.
Primer: Recommended. For internal use, Everflex WBP is typically suitable. For external applications, Everflex VBS is recommended. Apply according to the primer's TDS.
Surface prep: Ensure the timber flooring is structurally sound, stable, and dry. All surfaces must be clean and free of oils, grease, or other adhesion-hindering contaminants. Rectify any defects.
Primer: Recommended. For internal use, Everflex WBP is typically suitable. For external applications, Everflex VBS is recommended. Apply according to the primer's TDS.
Surface prep: Ensure boards are securely fastened and structurally sound. Surfaces must be clean, dry, and free from dust or other contaminants that could hinder adhesion.
Primer: Recommended. Everflex WBP is typically suitable for internal applications. Apply according to the primer's TDS.
| Property | Value |
|---|---|
| Type Of Product | Elastomeric Waterproof Membrane |
| Density | 1.3 g/cm3 |
| Consistency | Thick Liquid |
| Tested In Accordance With To AS | AS4858:2004, AS4654.1:2012 |
| Elongation AS 4858 | Class III, 391% |
| VOC | <1gm/lt (Greenstar Compliant) |
| Water Absorption AS 3558.1 | 0.75% |
| Resistance To Cracking AS 3848 | Pass: No fatigue cracking exhibited |
| Durability | Pass all (Deionised water, Bleach, Detergent & Heat Aged) |
| Clean Up | Water while wet |
| Storage | Between +10oc & +35oc (Cool Dry) |
| Application Temperature | Between +10oc & +35oc |
| Service Temperature | Between - 40oc & +80oc |
| Consumption | 1.5 lt/mt2 (Internal) |
| Recoat Time @ 25C | 2-4 Hours after touch-dry & within 24 hours |
| Final Drying Time @ 25C & 50% Humidity | 48 hours |
| Shelf Life | Minimum 12 month from DOM |
| Colours | Grey, Blue |
| Elongation AS4654.1:2012 | Class II |
| Permeability ASTM E96 | 3.92g/m2/24h |
Here are some common examples on where Everflex WPM Elastomeric Waterproof Membrane used by our customers.
