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WPA Aqualay - Technical Data Sheet



WPA AQUALAY is an innovative, high performance, flexible, easy to install new generation sheet waterproofing membrane system. The sheet itself consists of an EVAC core with a laminated non-woven geotextile fleece on either side of the central core. This unique system allows surface finishes including tiles, screeds and topping to be installed within hours of the membrane installation. Due to the highly flexible central core it also provides anti-fracture properties by isolating overlaying finished substrates surface cracks and defects.


Recommended for:

  • Internal wet areas, including Laundries, Toilets & Bathrooms

  • Wet rooms.

  • Balconies & terraces to be covered with tiles.

  • Anti-fracture system for internal tiling over concrete substrates.

  • Suitable for residential and commercial applications.



  • Fast installation and drying time.

  • Suitable for direct installation of toppings, screeds, acoustic underlays and ceramics.

  • Provides an anti-fracture system against surface cracks.

  • Suitable for both vertical and horizontal substrates.



  • Concrete & masonry block work.

  • Screeds and renders.

  • Wet area grade plasterboard, CFC and fibre cement sheeting, PAA structural and marine plywood & Particle board flooring.

  • Autoclaved aerated concrete panels (AAC).



All surfaces to be waterproofed must be firm, clean, dry, sound and smooth. All laitance, grease, oil, wax, curing compounds, loose material, paint and any other contaminants which may reduce or prevent adhesion must be mechanically removed. Masonry surfaces must be pointed flush and surface defects repaired.



New concrete must be cured for minimum 28 days. All concrete must be completely dry and primed with either WPA 360 water-based primer (Internal Only), WPA 460 or WPA 560 two-part water-based epoxy primer. Fibre cement and AAC flooring, must be primed with either WPA 460 or WPA 560 two-part water-based epoxy primer. Render and cement screeds must be cured for minimum 7days. Damp concrete, render or screeds must be allowed to thoroughly dry or primed with WPA 560 two-part water-based epoxy. (Refer to the WPA 560 TDS) Fibre cement sheeting, water resistant plasterboard, PAA structural and marine plywood, particle board and fibre cement flooring must be installed in accordance with the manufacturers’ installation requirements.



All critical areas including joints, junctions, penetrations, drainage outlets and cracks are to be detailed as described below.


Cracks <1.5mm


Cracks >1.5mm

Fill with WPA MS or WPA SPUR Sealant

Perimeter transition

WPA Elastoband

Vertical transitions

WPA Elastoband

Movement and expansion joints

WPA Elastoband

Penetrations, pipes and drainage outlets

WPA Elastoband Collars & WPA MS or WPA SPUR Sealant


Note: Please refer to the WPA 200 membrane TDS for mixing and installation details.



Measure and pre-cut the WPA Elastoband for the wall/floor junctions. Apply WPA 200 by either brush or roller to the wall/ floor junction extending it 100mm either side of the junction. Embed WPA Elastoband into wet WPA 200 with a brush or appropriate plastic trowel/spatula, ensuring fabric edges are fully wetted out and removing air pockets and excess WPA 200. Ensure the rear rubber section of WPA Elastoband is not bonded to the substrate. At sections where WPA Elastoband is to be joined, a minimum 50mm overlap is required. Install WPA Elastoband Prefabricated internal and external corners. Pre-cut the WPA AQUALAY to the desired length, leaving no more than 5mm between the sheet edge and the horizontal or vertical junctions. Apply WPA 200 by either brush or roller ensuring 100% coverage. Position and unroll the WPA AQUALAY into the wet WPA 200 and using a plastic trowel or float, or a pressure roller, press the WPA AQUALAY firmly into the WPA 200, ensuring a firm bond is achieved by removing all air pockets and excess WPA 200. Sheets must be overlapped a minimum of 50mm. Seal all laps with WPA 200.


NOTE: For installation of the above system over particle board or plywood substrates use WPA MS Adhesive to adhere the WPA AQUALAY sheet prior to the installation of the WPA Elastoband. Install WPA Elastoband in accordance with the above instructions.

Pipe penetrations and tap fixtures will require the WPA AQUALAY to be cut to enable the sheet to be placed over the penetration or fixture. Measure and place a cut where the sheet will be positioned and install the sheet ensuring the WPA AQUALAY is firmly bonded around the penetration or fixture. Apply WPA 200 and install a WPA Elastoband collar and complete the installation with a liberal coat of WPA 200 to fully seal the overlapped section.


Installation of tiles and stone coverings

Ceramic tiles and stone must be installed with a minimum C2S1 tile adhesive, such as TPA 401M or TPA Light, in accordance with the Technical Data Sheets.


Performance data and Physical Properties


EVAC (ethylene Vinyl acetate copolymer)


Non-woven geotextile


0.57 mm

Material weight


Working Temperature

-20ºC to +80ºC

Tensile Strength

0.7 N/mm²

Shear resistance of joint

N/50 230

Water Vapour Diffusion resistance Coefficient MN.s/g



Do not apply WPA AQUALAY:

  • If it is raining or if rain is imminent.

  • Over contaminated substrate.

  • Not compatible with solvent based materials, e.g. adhesives, sealants or coatings.

  • As an exposed membrane system, must be covered and protected by screeds, tiles or stone.

  • In areas subject to vehicular traffic.

  • Do not apply when surface temperature is below 5ºC or above 30ºC.

  • To areas of continuous immersion such as swimming pools, ponds, water features or water tanks.

  • For further information about this product contact the WPA Technical Department.



WPA AQUALAY is available in 1m x 30m rolls.



One roll of WPA AQUALAY covers 30m². (Not allowing for overlaps and wastage).


Shelf Life

24 months in a dry environment away from direct sunlight. If stored at high temperatures or humidity, the shelf life may be reduced.


Safety Precautions for WPA AQUALAY Ancillary Products


Clean Up

Tools and minor spills can be cleaned with water while WPA 200 is still wet. Wet WPA MS adhesive can be removed with Handywipe cleaning cloths. Cured WPA 200 or WPA MS adhesive can only be removed by mechanical means.



If poisoning occurs, contact a doctor or Poisons Information Centre (Phone Australia 131 126).



Remove victim from exposure - avoid becoming a casualty. Remove contaminated clothing and loosen remaining clothing. Allow patient to assume most comfortable position and keep warm. Keep at rest until fully recovered. Seek medical advice if effects persist.


Skin Contact

If skin or hair contact occurs, remove contaminated clothing and flush skin and hair with running water. If swelling, redness, blistering or irritation occurs seek medical assistance.


Eye Contact

If in eyes, wash out immediately with water. In all cases of eye contamination it is a sensible precaution to seek medical advice.



Rinse mouth with water. If swallowed, do NOT induce vomiting. Give a glass of water to drink. Never give anything by the mouth to an unconscious patient. If vomiting occurs give further water. Seek medical advice.


Notes to Physician

Treat symptomatically.



Prevent from entering drains or waterways. Absorb with sand, earth or spill control material. Collect in properly labelled containers for disposal in accordance with local statutory requirements.



Waterproofing Products Australia warrant this product for 10 years provided the application is in accordance with our written directions for use and the relevant Australian Standards have been followed. The representations and recommendations regarding this product are based on tests which we believe to be reliable. However, no guarantee of their accuracy can be made due to the great range of field conditions and variations encountered in raw materials, manufacturing equipment and methods. Thus, this product is sold with a limited warranty only, and on the condition that purchasers will carry out their own tests to determine the suitability of the product for their particular purposes. Under no circumstances will Waterproofing Products Australia be liable to anyone except for replacement of the products or refund of the purchase price.



The information provided in this technical bulletin is as correct in detail as possible and is intended to give a fair description of the product and its capabilities. In practice, the substrate and environmental conditions vary widely, making it essential for the user to determine the products suitability for a particular application and that the product is not used beyond its physical limitations. The product is guaranteed provided it is applied in accordance with our instructions as stated in this data sheet and any relevant Standard or Code, and provided the building and installation is structurally sound. WPA P/L terms and conditions of sale apply.



The technical information and application advice given in this WPA P/L publication is based on the present state of our best scientific and practical knowledge. As the information contained herein is of a general nature, no assumption can be made as to a product’s suitability for a particular use or application and no warranty as to its accuracy, reliability or completeness, either expressed or implied, is given other than those required by law. The user is responsible for checking the suitability of products for their intended use.



Field service where provided does not constitute supervisory responsibility. Suggestions made by WPA P/L either orally or in writing may be followed, modified or rejected by the owner, engineer or contractor since they, and not WPA P/L, are responsible for carrying out procedures appropriate to a specific application.






Last updated June 2019.  


The publication of this Data Sheet invalidates all previous Product Information. Data Sheets are subject to change without notice.  Please visit regularly to view up to date information.  This is a CONTROLLED document under WPA’s Quality System.