What substrates does ACTFLEX 101 UV bond to?

101 UV bonds to concrete, render, fibre-cement, plasterboard, and masonry over an appropriate primer. Designed for exposed roofs, gutters, and exterior walls where UV resistance is required.

How is it different from other ACTFLEX membranes?

101 UV is a UV-stabilised copolymer formulated specifically for permanent UV exposure - it resists chalking and re-emulsification that affects standard membranes under sun exposure. 450% elongation, low VOC.

How many coats and thickness?

Apply three coats at approximately 1.2mm total DFT. Use 0.8mm DFT on walls and 1.2mm DFT on roof areas. Coverage is 8-10 m² per 15L. Trafficable in 24 hours.

Standards compliance?

Class III certified per AS/NZS 4858 and meets AS4654.1 for external waterproofing. The UV stability makes it the recommended membrane where direct sun exposure cannot be avoided.

What's the application temperature range?

Apply between 10°C and 26°C ambient. Tack-free in 6 hours, full cure in 14 days. Avoid application in direct sun on hot substrates - schedule for cool morning or shaded conditions.

Forspec ACTFLEX 101 UV stable water based Class III waterproofing membrane

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ACTFLEX 101 UV Stable Trafficable Membrane

$250.00

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UV-stable Class III membrane for exposed roofs, parapets and box gutters. Still 317% elongation after UV testing.

ACTFLEX 101 UV is a single-pack, water-based acrylic co-polymer membrane for surfaces that stay out in the weather. Tested Class III to AS 4654.1, it keeps 317% elongation after UV exposure testing, so it does not go brittle. Grey or white, 15 L pail.

Where to use it

Exposed rooftops and protected or exposed podium slabs (AS 4654.2)
Wall facades and parapet walls
Box gutters and exposed horizontal drainage surfaces
Under pedestal paver systems
Concrete, render, screed, masonry, fibre cement, primed metal and PVC. Prime porous substrates with ACTFLEX EP250

Why waterproofers buy it

Class III to AS 4654.1, independently tested. 434% control elongation
Retains 317% elongation after UV exposure testing. Does not re-emulsify after curing
Water based, low odour, 45 g/L VOC, NATA certified. Fine in confined spaces
Single pack. Roller, brush or airless spray
Tintable to pastel shades (max 1% acrylic tint) and paintable with acrylic paints
Recoat 6 to 48 hours. Light foot traffic from 24 hours

Coverage

15 L (20 kg) pail: practical 7 to 9 m² at 1.2 mm DFT, two coats, on roofs, gutters and horizontals.
External walls at 0.8 mm DFT: practical 11 to 13 m².

Not for

Trafficable wearing surfaces (maintenance foot traffic only), pools, ponds or anything submerged, chlorine environments, negative pressure, or application outside 10 to 26°C. Check compatibility on silicone or bituminous surfaces. Keep rain off for 72 hours after the final coat.

All times at 25°C and 50% RH.

Independently tested Class III to AS 4654.1-2012, XTecGen Report 254-1

Retains 317% elongation after UV exposure testing to AS 4654.1

Low VOC at 45 g/L, NATA certified, meets GBCA Green Star requirements

Colour: WHITE

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ACTFLEX 101 UV Stable Trafficable Membrane

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Product Details

Key Features: 101 UV

Exhibits remarkable resistance to UV radiation, weathering, and CO2 exposure.
Classified under Class 111, signifying unparalleled flexibility, tenacity, and endurance.
Complies with Green Star environmental standards, aligning with eco-conscious construction practices.
Conforms to AS4564 standards, validating its performance excellence.
Amenable to conventional acrylic paint application, rendering it paintable.
Supports light maintenance foot traffic upon complete curing.
Allows for application on both horizontal and vertical surfaces due to excellent build properties.

Ideal Applications:

Suited for exposed rooftop installations, safeguarding against water infiltration.
Ideal for wall facades, guaranteeing moisture resistance and structural integrity.
Effective in box gutters, preventing water accumulation and potential deterioration.
Applicable on exposed podiums, enhancing water resilience and longevity.
Suitable for parapet walls, upholding their structural and aesthetic integrity.

How to Use

Apply two coats by medium-nap roller, long-bristle brush or airless spray at 0.92 mm wet film per coat for 1.2 mm total DFT on roofs and horizontalsConfirm the substrate is structurally sound and dimensionally stable, and clean, dry, smooth and free of oils, grease, wax, mould, dust, curing compounds, release agents, coatings, adhesives, loose particles, rust, paint and efflorescence
Confirm concrete is cured a minimum of 28 days with a wood-trowel finish, and renders and screeds a minimum of 7 days with a wood-trowel finish
Reinstate damaged concrete with the FORSPEC concrete repair system such as FORBUILD 100 or FORCRETE 100, and fill blowholes and imperfections with a high-strength, non-shrink mortar and allow to cure
Remove high points and protrusions that could pierce the membrane; all surfaces solid, never crumbly
Confirm external falls of minimum 1:100 to drainage outlets, per the project design and AS 4654.2
Treat static cracks under 2 mm with ACTFLEX SA TAPE centred over the primed crack, bedded with a brass detail roller and encapsulated with two coats of ACTFLEX 101 UV
Grind static cracks 2 mm and over to a minimum 6 mm x 6 mm reglet, fill with ACTFLEX MS PRO tooled flush, cover with a bond-breaker tape once cured and apply two coats of ACTFLEX 101 UV
Prime porous and cementitious substrates with ACTFLEX EP250, one coat on sound dry substrates and two coats where specified, where concrete is under 28 days old, or for moisture control
Prime dense, smooth and non-porous substrates including metal and PVC with ACTFLEX SUPERPRIME 008 following compatibility confirmation
Detail floor joints, wall and floor junctions and penetrations with ACTFLEX SA TAPE, a minimum 50 mm onto each plane, overlapping all tape ends a minimum of 50 mm and sealing all edges
Or apply a 15 mm x 15 mm ACTFLEX MS PRO fillet at drains, penetrations, floor and wall junctions and joints for external applications, tooled smooth
Mix thoroughly before use with an electric drill and low-speed mixer attachment until uniform, avoiding high-speed mixing and air entrainment; do not dilute
Apply a generous, even first coat by medium-nap roller (8-12 mm pile), long-bristle brush or airless spray at 0.92 mm wet film to achieve 0.6 mm DFT on roofs and horizontals
Allow to dry, typically 4-6 hours at 25C and 50% RH, then apply the second coat at the same build at approximately right angles to the first
Observe the recoat window of minimum 6 hours and maximum 48 hours at 25C and 50% RH
Verify wet film thickness with a gauge on every coat, and check for pinholes, misses and ponded material and that details are fully encapsulated
Protect the membrane from rain, standing water and immersion for 72 hours after the final coat, and from contamination and construction damage until covered or handed over
Allow full cure of 14 days at 25C and 50% RH before maintenance foot traffic, and place rubber matting or approved load-spreading pads beneath every pedestal base where a pedestal paver system is installed

Technical Specifications

Membrane Classification: Class III (AS 4654.1-2012, XTecGen Report 254-1)
Chemical Base: UV-stable elastomeric acrylic co-polymer
Form: Single-component viscous liquid
Colour: Grey or white; tintable to pastel shades (max 1% acrylic tint)
Packaging: 15 L (20 kg) pail
Solids Content: 65%
Control Elongation at Break: 434% (AS 1145.3, Report 254-1)
Control Tensile Strength: 4.26 MPa (AS 1145.3, Report 254-1)
Elongation After UV Exposure: 317% at 2.73 MPa (AS 4654.1 Appendix A, Report 254-1)
Cyclic Movement: Pass, failure not observed (AS 4654.1 Appendix B, Report 254-1)
Bond Strength: 29.02 N (ASTM C794, Report 254-1)
Water Vapour Transmission: 3.07 g/m2/24 h (ASTM E96, Report 254-1)
VOC Content: 45 g/L (ASTM D3960 / D2369, FORAY Laboratories NATA 1231, Certificate P23010038)
Abrasion Resistance: 0.071 mm meets non-trafficable; 0.156 mm meets pedestrian-traffic-only (AS 1580.403.2, Report 254-1)
Tear Resistance: 8-12 N/mm2*
Shore Hardness: 60 or greater*
Fatigue Cracking: No fatigue cracking, pass*
Tack-Free Time: 6 hours at 25C, 50% RH
Recoat Time: Minimum 6 hours, maximum 48 hours at 25C, 50% RH
Light Foot Traffic: From 24 hours at 25C, 50% RH
Rain and Water Exposure: Protect for 72 hours after the final coat
Full Cure: 14 days after the final coat at 25C, 50% RH
Recommended Thickness: 1.2 mm total DFT over 2 coats for roofs, gutters and exposed horizontals; 0.8 mm total DFT over 2 coats for external exposed walls
Coverage: Theoretical 9-10 m2 and practical 7-9 m2 per 15 L pail at 1.2 mm DFT
Application Temperature: 10-26C (ambient and substrate)
Shelf Life: 12 months, unopened, stored as specified
Hazard Classification: Hazardous chemical; non-dangerous goods
* Typical Forspec R&D characteristic values

Product Files

ACTFLEX 101 UV Stable Trafficable MembraneWHITE

$250.00

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System Build-Up Guide

Correct application makes all the difference.

View All Details

Pool System Build-Up

1 Concrete Substrate
2 Crack Repair (if required)
3 ACTFLEX FLEXPLUS
4 ACTFLEX HYDROPLUG
5 ACTFLEX AT MESH
6 ACTFLEX 988 CWP (2 Coats)
7 Tile Adhesive
8 Pool Finish

Retaining Wall System Build-Up

1 Concrete Substrate
2 Crack Repair (if required)
3 ACTFLEX MS PRO
4 ACTFLEX AT MESH
5 ACTFLEX 988 CWP (2 Coats)
6 Protection Board (Optional)
7 Drainage System
8 Backfill

Tank System Build-Up

1 Concrete Substrate
2 Crack Repair (if required)
3 ACTFLEX FLEXPLUS
4 ACTFLEX AT MESH
5 ACTFLEX 988 WMP (2 Coats)
6 Protective Coating (Optional)
7 Water

Technical overview

ACTFLEX 101 UV is a UV-stable elastomeric acrylic co-polymer Class III waterproofing membrane for permanently exposed applications: rooftops, facades, parapets, box gutters and podiums. It is single-component and applies by roller, brush or airless spray in two coats, at 1.2 mm total DFT on roofs, gutters and exposed horizontal surfaces or 0.8 mm total DFT on external exposed walls. It is independently tested Class III to AS 4654.1-2012 under XTecGen Report 254-1 (summary 254-2), with VOC content of 45 g/L certified by NATA-accredited testing under FORAY Laboratories Certificate P23010038. Asterisked values in the data sheet are typical Forspec R&D characteristic values.

View full technical data sheet

Key applications

Exposed rooftops and protected or exposed podium slabs
Wall facades and parapet walls, exposed architectural waterproofing
Box gutters and exposed horizontal drainage surfaces
Beneath pedestal-supported paver systems over the cured membrane
External above-ground waterproofing in accordance with AS 4654.1 and AS 4654.2

Surface suitability

Concrete (cured a minimum of 28 days, wood-trowel finish)
Renders and screeds (cured a minimum of 7 days, wood-trowel finish)
Wet-area-grade fibre cement sheeting, walls (minimum 6 mm)
Wet-area-grade compressed fibre cement sheet (minimum 15 mm)
Wet-area-grade plasterboard (minimum 10 mm)
Brickwork, blockwork and masonry
Timber, metal and PVC (primed)

Maintenance foot traffic only - ACTFLEX 101 UV is not a trafficable wearing surface, and light foot traffic is only from 24 hours after the final coat. Not a vapour barrier and not designed to withstand negative-side hydrostatic pressure. Not for constantly submerged applications such as swimming pools and ponds, and not suitable for chlorine environments. Not compatible with all silicone-based and bituminous surfaces and products - confirm compatibility before application. Apply only to dry substrates free from dampness, only between 10-26C ambient and substrate, and do not apply if rain threatens; protect from rain and water for 72 hours after the final coat. Tinting may affect solar and UV reflective properties - never exceed 1% acrylic tint. Movement joints may exceed the membrane's movement capability - never bridge active joints with continuous membrane. Do not dilute unless expressly authorised in writing by an authorised FORSPEC representative.

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ACTFLEX 101 UV Stable Trafficable Membrane

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Technical Specifications

Membrane Classification	Class III (AS 4654.1-2012, XTecGen Report 254-1)
Chemical Base	UV-stable elastomeric acrylic co-polymer
Form	Single-component viscous liquid
Colour	Grey or white; tintable to pastel shades (max 1% acrylic tint)
Packaging	15 L (20 kg) pail
Solids Content	65%
Control Elongation at Break	434% (AS 1145.3, Report 254-1)
Control Tensile Strength	4.26 MPa (AS 1145.3, Report 254-1)
Elongation After UV Exposure	317% at 2.73 MPa (AS 4654.1 Appendix A, Report 254-1)
Cyclic Movement	Pass, failure not observed (AS 4654.1 Appendix B, Report 254-1)
Bond Strength	29.02 N (ASTM C794, Report 254-1)
Water Vapour Transmission	3.07 g/m2/24 h (ASTM E96, Report 254-1)
VOC Content	45 g/L (ASTM D3960 / D2369, FORAY Laboratories NATA 1231, Certificate P23010038)
Abrasion Resistance	0.071 mm meets non-trafficable; 0.156 mm meets pedestrian-traffic-only (AS 1580.403.2, Report 254-1)
Tear Resistance	8-12 N/mm2*
Shore Hardness	60 or greater*
Fatigue Cracking	No fatigue cracking, pass*
Tack-Free Time	6 hours at 25C, 50% RH
Recoat Time	Minimum 6 hours, maximum 48 hours at 25C, 50% RH
Light Foot Traffic	From 24 hours at 25C, 50% RH
Rain and Water Exposure	Protect for 72 hours after the final coat
Full Cure	14 days after the final coat at 25C, 50% RH
Recommended Thickness	1.2 mm total DFT over 2 coats for roofs, gutters and exposed horizontals; 0.8 mm total DFT over 2 coats for external exposed walls
Coverage	Theoretical 9-10 m2 and practical 7-9 m2 per 15 L pail at 1.2 mm DFT
Application Temperature	10-26C (ambient and substrate)
Shelf Life	12 months, unopened, stored as specified
Hazard Classification	Hazardous chemical; non-dangerous goods
* Typical Forspec R&D characteristic values

Real Projects. Real Results.

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Before After
Pool Renovation
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Commercial Podium
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Frequently asked questions

View all FAQs

What substrates does ACTFLEX 101 UV bond to?

Compatibility
101 UV bonds to concrete, render, fibre-cement, plasterboard, and masonry over an appropriate primer. Designed for exposed roofs, gutters, and exterior walls where UV resistance is required.
How is it different from other ACTFLEX membranes?

Performance
101 UV is a UV-stabilised copolymer formulated specifically for permanent UV exposure - it resists chalking and re-emulsification that affects standard membranes under sun exposure. 450% elongation, low VOC.
How many coats and thickness?

Installation
Apply three coats at approximately 1.2mm total DFT. Use 0.8mm DFT on walls and 1.2mm DFT on roof areas. Coverage is 8-10 m² per 15L. Trafficable in 24 hours.
Standards compliance?

Compliance
Class III certified per AS/NZS 4858 and meets AS4654.1 for external waterproofing. The UV stability makes it the recommended membrane where direct sun exposure cannot be avoided.
What's the application temperature range?

Performance
Apply between 10°C and 26°C ambient. Tack-free in 6 hours, full cure in 14 days. Avoid application in direct sun on hot substrates - schedule for cool morning or shaded conditions.

ACTFLEX 101 UV Stable Trafficable Membrane

Frequently bought together

Pool System Build-Up

Retaining Wall System Build-Up

Tank System Build-Up

Technical overview

Key applications

Surface suitability

Calculate your coverage

Technical Specifications

Pool Renovation

Below Ground Retaining Wall

Concrete Water Tank

Commercial Podium

Swimming Pool Construction

The Waterproofing Shop?

Frequently asked questions

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