ACTFLEX 929 HV Polyurethane membrane
Non-sagging moisture-cured polyurethane Class III waterproofing membrane
Class III under both AS/NZS 4858 and AS 4654.1. Non-sag, so it holds on walls and floors.
How ACTFLEX 929 HV goes on
ACTFLEX 929 HV coverage, coats and cure times
Single-component moisture-cured polyurethane membrane for wet areas, roof terraces, planter boxes, retaining walls and parking decks beneath protected finishes. Roller and brush only.
- Coverage
- ≈ 10 m²per 15 L pail at 1.2 mm total DFT · TDS p3
- Planter box
- ≈ 8.5 m²per 15 L pail at 1.5 mm total DFT · TDS p3
- Dry film
- 1.2 mmminimum, 2 coats at about 0.7 mm wet each · TDS p5
- Coats
- 2minimum, second at about right angles · TDS p5
- Recoat
- 4–6 hmaximum 24 hours · TDS p5
- Full cure
- 48 htypicalat 1.2 mm DFT, before screed or tiling · TDS p2
- Flood test
- After cure24-hour test, 50 mm minimum depth · TDS p6
- Pack
- 15 L pail20 kg, grey, single component · TDS p2
- Apply at
- 10–26°Cambient and substrate · TDS p2
From the FORSPEC data sheet, TDS-929HV · Revision 4 · 27 October 2026. Times are at 25°C and 50% relative humidity unless the data sheet says otherwise. Typical = FORSPEC’s own typical value, not a laboratory-certified one.
ACTFLEX 929 HV on site
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Where ACTFLEX 929 HV is used
Use it for
- Internal and external wet areas beneath protected finishes
- Non-exposed roofs and roof terraces beneath approved coverings
- Planter boxes and pits with non-aggressive roots, 1.5 mm total DFT
- Retaining walls and below-grade surfaces in corrosive soils
- Bridges, walkways, substations and parking decks beneath protection
- Prepared concrete and metal, maintenance and repairs
Know before you start
- Not for sunlight or UV: cover or protect it straight after full cure
- No direct tiling to the membrane: tile to the screed
- Not for pools, ponds, chlorine or negative-side hydrostatic pressure
- Roller and brush only: no spray, and no dilution with xylene or solvent
How to apply ACTFLEX 929 HV
- 01
Prepare
Concrete cured 28 days, renders and screeds 7 days, wood-trowel finish. Clean, dry and sound. Falls indoors at least 1:80 and no more than 1:50, outdoors at least 1:100.
- 02
Prime
ACTFLEX EP250 on prepared concrete: one coat, or two where specified for moisture control. ACTFLEX MB200 and ACTFLEX 700 PU PRIMER are the other primers named.
- 03
Detail
Cracks under 2 mm: ACTFLEX SA TAPE, ends lapped 50 mm. Cracks 2 mm and over: fill with ACTFLEX 75FC. Fillet ACTFLEX 75FC at junctions: 12 mm indoors, 15 x 15 mm outdoors.
- 04
Mix
Stir gently at low speed to a uniform mix without whipping in air. Keep the pail sealed between draws, as it cures on moisture. Do not dilute.
- 05
Apply
Roller or brush, two coats at about 0.7 mm wet each, the second at about right angles. Recoat in 4 to 6 hours, within 24. Never exceed 1.5 mm wet in one coat.
- 06
Cover
Allow 48 hours full cure, then flood test 24 hours. Lay a 200-micron slip sheet, screed 40 mm minimum (35 mm with SCREED X) and tile to the screed. Protect from UV straight after cure.
A short guide from the data sheet. Read the full ACTFLEX 929 HV TDS before you start.
How much ACTFLEX 929 HV do I need?
Polyurethane membrane for walls and details, 15 L pail
Two coats at about 0.7 mm wet (1.4 L/m²) for the 1.2 mm dry film; planter boxes two coats at about 0.85 mm wet (1.7 L/m²) for 1.5 mm. EP 250: one coat at 0.32 kg/m², so a 4 kg kit primes about 12.5 m². 700 PU: 4 to 6 m² per litre, so 17 L primes about 68 m². 75FC: a 12 mm fillet takes about 80 mL a metre, so a 600 mL sausage runs about 7 m.
You need
0 pails
Where the figures come from
Two coats at about 0.7 mm wet (1.4 L/m²) for the 1.2 mm dry film; planter boxes two coats at about 0.85 mm wet (1.7 L/m²) for 1.5 mm. EP 250: one coat at 0.32 kg/m², so a 4 kg kit primes about 12.5 m². 700 PU: 4 to 6 m² per litre, so 17 L primes about 68 m². 75FC: a 12 mm fillet takes about 80 mL a metre, so a 600 mL sausage runs about 7 m.
- Consumption, 1.2 mm dry film in two coats: about 1.4 L/m². TDS-929HV, R4, 27 Oct 2026, page 3
- Consumption, planter boxes, 1.5 mm: about 1.7 L/m². TDS-929HV, R4, 27 Oct 2026, page 3
- EP 250 per coat; 4 kg kit, one coat: 0.32 kg/m²; 12.5 m². TDS-EP250, R4, 12 Nov 2026, page 3
- 700 PU coverage; pack: 4 to 6 m²/L; 17 L. TDS-700PU, R2, 12 Aug 2026, page 2
- 75FC demand: width × depth in mm = mL per metre, plus about 10%. TDS-75FC, R2, 12 Aug 2026, page 3
More: ACTFLEX 929 HV product page · Balconies & podiums system · Planter boxes system
Drawings for the systems it goes in
FORSPEC standard details as PDF and DXF. Each sheet is a generic detail: the specification names the products.
ACTFLEX 929 HV test reports and compliance
- AS/NZS 4858:2004
- Class IIIXTecGen Report 0242-5
- AS 4654.1-2012
- Class IIIXTecGen Report 0242-7
- Bond strength (ASTM C794)
- 30.76 N on EP250-primed concrete, mainly substrate failureXTecGen Report 0242-7
- AS 3740:2021
- Complies as a Class III membrane within a compliant systemNo report cited
- AS 4654.2
- Non-exposed applications within an approved systemNo report cited
Download the reports
Results as stated in the data sheet, TDS-929HV · Revision 4 · 27 October 2026. Warranty up to 25 years, depending on the system: ask FORSPEC which term applies to your system.
ACTFLEX 929 HV questions
Can I tile straight onto ACTFLEX 929 HV?
No. Direct tiling to the cured membrane is not recommended. Lay a 200-micron slip sheet, screed over it, and tile to the screed to AS 3958.1.
How much ACTFLEX 929 HV do I need?
One 15 L pail covers about 10 m² at 1.2 mm total DFT in two coats, or about 8.5 m² at 1.5 mm for planter boxes. Consumption is about 1.4 L/m² and rises with profile and detailing.
Can it be left exposed to the sun?
No. It is not suitable for sunlight or UV. Cover it straight after full cure, or topcoat with ACTFLEX ATC or ACTFLEX ULTRA TC before pedestals go on.
Is 929 HV root resistant?
Only for non-aggressive root systems such as small garden trees, hedges and shrubs, at 1.5 mm minimum total DFT in planter boxes. It is not for aggressive or invasive species.
How long before flood testing or screeding?
Allow a minimum of 48 hours full cure at 25°C and 50% RH. Then flood test to 50 mm minimum depth for 24 hours before covering.
Can I spray it?
No. Spray application is not approved. Use roller and brush only, and do not dilute with xylene or any solvent.
Used with ACTFLEX 929 HV
ACTFLEX 929 HV TDS and SDS
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Always work from the current data sheet. Every FORSPEC TDS and SDS →
Specify it. Or buy it.
Send the drawings or photos and FORSPEC comes back with the system, the details and the quantities. Or find a FORSPEC stockist for ACTFLEX 929 HV.