WMA

UV SPEC – UV-Stable Class III Membrane 15L

$150.00 AUD
$150.00 AUD
$175.00 AUD
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WMA UV SPEC is H2O Supplies’ go-to waterproofing membrane, trusted by builders and applicators for its balance of performance, durability and ease of use. This water-based polyurethane acrylic membrane is
  • UV stable for exposed applications
  • Class III membrane
  • Internal and external waterproofing
Calculating estimated delivery
  • Does not re-emulsify once cured
  • Fast curing and easy to apply
  • Seamless and flexible finish
  • Resistant to salt and carbon attack
  • Environmentally friendly
  • Tintable in a range of grey shades
  • Surface preparation
  • Ensure surfaces are clean, dry, sound and smooth. Remove laitance, grease, oil, wax, curing compounds, loose material, paint and other bond-breaking contaminants. Point masonry flush and repair defects. Cure new concrete for at least 28 days or prime with WMA Aquastatic Epoxy. Cement screeds must be fully cured or epoxy primed.
  • Priming
  • Prime porous plasterboard and cement boards with WMA GP Primer. Prime green screed or concrete with WMA Aquastatic Epoxy at not less than 1 L per 4 m² and allow to dry. WMA Aquastatic Epoxy is required for exposed external areas; timber and particleboard; bitumen; and substrates where entrapped moisture may cause bubbling. Prepare and etch-prime metal, treating rust first where present.
  • Detailing
  • Form cured flexible sealant fillets at corners. Fill and seal joints, gaps and cracks with an appropriate polyurethane or equivalent waterproof sealant and allow it to cure. Reinforce jointed areas, corners and cracks with suitable mesh or bandage tape, fully saturating the fabric without wrinkles or bubbles. Rebate floor wastes and puddle flanges into the floor. Embed required plastic or metal angles into a continuous, gap-free bed of polyurethane sealant or mastic.
  • Application
  • After the primer has dried, stir UV SPEC thoroughly. Apply by brush or roller in a minimum two-coat system. Apply the first coat at a minimum 0.85 mm WFT and, once dry, the second coat at a minimum 0.85 mm WFT. Three or more coats may be used to achieve an equivalent result. Achieve at least 1.0 mm DFT on floors and 0.5 mm DFT on walls. Check wet-film thickness regularly with a WFT gauge.
  • Drying and curing
  • Allow 6–12 hours between coats. Allow 36 hours before tiling and four days curing before flood testing. Allow longer in cooler or damp conditions. Drying and curing vary with substrate porosity, ventilation, weather and application technique.
  • Appearance: Smooth, viscous liquid
  • Type: Water-based polyurethane acrylic membrane
  • Classification: Class III (AS 4858 & AS 4654.1 compliant)
  • Solids by volume: 61%
  • Curing time: 96 hours at 23°C / 55% RH
  • Tack-free: Approx. 2 hours
  • Recoat time: 6–12 hours
  • Full cure before tiling: 36 hours
  • Flood test: 4 days
  • Coverage: Approx. 9 m² per drum (floors at 1mm DFT), 18 m² per drum (walls at 0.5mm DFT)
  • Shelf life: 12 months (unopened)
  • Storage: Store in a cool, dry place away from heat and direct sunlight
  • Compliance: AS 4858:2004, AS 4654.1
Technical Data Sheet Safety Data Sheet

Complete Your System

System total

Applications

Balcony
Podium
Rooftop
Planter Box
Retaining Wall
Internal Wet Areas
External Waterproofing
Under Tile
Exposed Finish

Estimate Material Requirements

Estimate the quantity of product required based on the project area. Calculations are indicative only and should be verified by the installer before application.

Recommended: 2 coats

Estimated Quantity Required
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Total Coverage
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Waste Allowance Applied
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Technical Specifications

Key technical properties of this product. Refer to the Technical Data Sheet for complete installation and performance information.

ClassificationClass III; compliant with AS 4858:2004 and AS 4654.1
CoverageFloors: approx. 9 m² per 15 L pail (0.60 m²/L) at 1.0 mm DFT. Walls: approx. 18 m² per 15 L pail (1.20 m²/L) at 0.5 mm DFT.
Recommended CoatsMinimum two-coat system; three or more coats may be used to achieve equivalent thickness
Dry Film ThicknessFloors: minimum 1.0 mm; walls: minimum 0.5 mm
Elongation at Break428.44% dry; 720.38% water immersion; 331.95% detergent immersion; 789.25% bleach immersion
Tensile Strength2.62 N/mm² dry; 1.364 N/mm² water; 1.35 N/mm² detergent; 1.155 N/mm² bleach
Recoat Time6–12 hours at 23°C and 55% RH
Full Cure96 hours at 23°C and 55% RH
Suitable SubstratesConcrete, cement screeds, masonry, fibre cement sheeting, water-resistant plasterboard, timber, particleboard, bitumen, metal, PVC, Scyon sheets and glass, subject to specified preparation and priming
Internal / External UseInternal and external; suitable under tiles and for exposed applications
Tack touchApproximately 2 hours at 23°C and 55% RH
Flood testAfter four days curing
View Technical Data Sheet

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