Can I use it with ACTFLEX 929, 75FC or MS PRO?

No. ACTFLEX 901 BUV is bitumen based and not compatible with the Forspec polyurethane range. Never overcoat it with, apply it over, or detail it with ACTFLEX 929 SL, 929 HV, 75FC or MS PRO. Corners and details are done with the FORSPEC bandage system only.

Can I put it over an old bitumen roof?

Yes, if the existing asphalt coating or bituminous sheet membrane is sound and well adhered. Clean it, cut out blisters, remove loose and delaminated material and reinstate those areas first. At 4% substrate moisture or below, no separate primer is needed on sound existing bituminous surfaces.

How much does an 18 kg pail cover?

At 2.4 to 3.0 kg/m² over two coats for 1.5 mm total DFT, an 18 kg pail covers 6.0 to 7.5 m² in theory. Allow 10 to 15% for wastage, porosity and surface profile, which gives 5.1 to 6.8 m² in practice. Open-textured concrete and aged bitumen surfaces sit at the upper end of the rate.

When can people walk on it?

Light pedestrian traffic is 7 days after the final coat, at 25°C and 50% RH. It is rain resistant once hard dry, approx. 7 hours. Cool, humid or enclosed conditions take longer, so check the film is dry on site. It is for foot traffic only, not vehicles, wheeled loads or machinery.

Is it certified to AS 4654.1?

No. No accredited third-party test report to an Australian Standard is held yet, and the performance figures are manufacturer lab values. Verification testing to AS 4654.1 has been programmed. If your project needs a certified membrane, confirm the compliance pathway with Forspec Technical Services first.

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ACTFLEX 901 BUV 18Kg Bitumen UV Traffic

Name: ACTFLEX 901 BUV 18Kg Bitumen UV Traffic
Brand: Forspec Protective Coatings
SKU: AACT389
Price: 2.00 AUD
Availability: OutOfStock

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An exposed bitumen membrane you can walk on. No screed, no tiles, no protection layer.

ACTFLEX 901 BUV is a one-component, water-based bitumen membrane for exposed roofs, terraces and decks. Most bitumen coatings must be buried. This one is made for permanent outdoor exposure. It also refurbishes old asphalt coatings and bituminous sheet membranes without stripping them out.

Where to use it

Exposed concrete roofs and roof slabs
Terraces and exposed decks, foot traffic only
Sloped roofs and eaves gutter lines
Refurbishing old asphalt coatings and bituminous sheet membranes
Over 4% substrate moisture, prime with two coats of ACTFLEX EP250

Why waterproofers buy it

720 hours accelerated weathering with no cracking, blistering or pinholing
No flow at 140°C. It won't slump on a sun-loaded roof
Rough, non-tacky surface underfoot
100% minimum elongation. Handles substrate movement and shrinkage cracking
One component, water based, non-flammable. Tools wash up in water
Recoat 8 to 48 hours. Light foot traffic 7 days after the final coat
10 year Forspec product warranty

Coverage

18 kg pail: 5.1 to 6.8 m² practical (6.0 to 7.5 m² theoretical) at 2.4 to 3.0 kg/m², two coats, 1.5 mm total DFT.

Not for

Under screeds, tiles or bonded finishes, vehicle traffic, pools, ponds, tanks, permanent immersion or negative-side pressure. Not compatible with Forspec polyurethanes such as ACTFLEX 929 SL, 929 HV, 75FC and MS PRO. Never dilute. Apply at 5 to 35°C.

All times at 25°C and 50% RH. Figures are manufacturer lab values. No accredited Australian Standard test report is held yet.

Fully exposed - no screed, tiles or protection layer required

Trafficable for pedestrian use - rough, non-tacky cured surface

Refurbishes old asphalt coatings and bituminous sheet membranes without removal

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ACTFLEX 901 BUV 18Kg Bitumen UV Traffic

The Waterproofing Shop

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Roselands NSW 2196
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Product Details

Compliance status: no accredited third-party test report to an Australian Standard is presently held for ACTFLEX 901 BUV. The performance values quoted are manufacturer characteristic values determined under laboratory conditions, pending accredited verification testing, and verification testing to AS 4654.1 has been programmed. Where a project needs a certified membrane for external above-ground waterproofing, confirm the compliance pathway with FORSPEC Technical Services before specifying.

ACTFLEX 901 BUV is an exposed system. It is not for use beneath screeds, tiles or bonded finishes, and it is trafficable for pedestrian use only. It is bitumen based and must never be overcoated with, applied over, or detailed using the FORSPEC polyurethane range.

Warranty: 10 year Forspec Standard Product and Performance Warranty from the date of purchase, when installed and used strictly in accordance with the Technical Data Sheet. It covers the supply of the product only, not installation, application or workmanship.

Water based, non-flammable and non-explosive, but it may still irritate the skin, eyes and respiratory tract. Read the Safety Data Sheet before use.

How to Use

Stir at low speed, then apply by brush or roller in two coats of 1.2-1.5 kg/m² each to a 1.5 mm total DFT, the second coat at right angles to the firstConfirm the substrate is structurally sound and within tolerance before work begins - application constitutes acceptance of the substrate
Clean thoroughly to remove all dust, dirt, oils, grease, laitance, curing compounds, release agents, loose particles, moss and existing coatings that are not sound
Remove all standing water and allow the substrate to dry - do not apply to a wet or ponding surface
Reinstate spalled or damaged concrete with FORBUILD 100 or FORCRETE 100 and allow repairs to cure fully
Grind back high points, fins and protrusions; fill blowholes and honeycombing and finish flush
On refurbishment work, cut out blisters, remove delaminated material, reinstate the area and confirm the remaining membrane is sound and well adhered
Verify falls - minimum 1:100 draining positively to outlets, with no ponding
Measure substrate moisture with a calibrated non-destructive moisture meter, averaged across the area and confirmed at the wettest point
4% or below: no separate primer on sound, clean, dry concrete, cement substrates and sound existing bituminous surfaces
Above 4%: apply two coats of ACTFLEX EP250 and allow a minimum of 24 hours cure after the final coat, within its recoat window
Stir with a flat paddle at low speed to redisperse settled solids - no high-speed mixing, never dilute
Detail corner junctions, changes of plane, penetrations, outlets and joints: a generous coat extending a minimum of 100 mm onto each plane, FORSPEC bandage embedded centrally into the wet coat, then a further coat to fully encapsulate it
At FORZAFLEX sheet terminations, remove talc and dust, then dress the detail the same way, carried a minimum of 100 mm onto the sheet and 100 mm onto the adjoining substrate or upstand
Allow the details to dry before the field coats are applied
Apply coat 1 by brush or roller at 1.2-1.5 kg/m² (0.75 mm DFT), working it firmly into the substrate
Recoat once the first coat is fully dry - minimum 8 hours, maximum 48 hours at 25°C, 50% RH
Apply coat 2 at 1.2-1.5 kg/m² (0.75 mm DFT) at right angles to the first, carrying the field membrane a minimum of 50 mm beyond the bandage edge
Check for holidays, pinholes and thin areas at upstands and outlets, and confirm the minimum 1.5 mm total DFT
Protect from rain until hard dry (approx. 7 hours at 25°C, 50% RH)
Light pedestrian traffic, full cure, inspection and acceptance from 7 days after the final coat

Technical Specifications

Product Form: One-component water-based liquid, ready to use
Chemical Base: Exposure-grade emulsion and modified emulsified bitumen
Colour: Grey-brown
Packaging: 18 kg pail
Solids Content: 70% minimum*
Elongation at Break, untreated: 100% minimum*
Elongation at Break, after acid, alkali or heat conditioning: 80% minimum*
Adhesion to Prepared Concrete: 0.5 MPa minimum*
Water Impermeability: Impermeable at 0.1 MPa sustained for 30 minutes*
Heat Resistance: No flow, slip or drip at 140°C ± 2°C*
Low-Temperature Flexibility, untreated: No cracking at -5°C*
Low-Temperature Flexibility, after conditioning: No cracking at 0°C*
Artificial Weathering (720 hours): No cracking, delamination, blistering, adhesion failure or pinholing*
Total Dry Film Thickness: 1.5 mm minimum over two coats, 0.75 mm DFT per coat
Consumption: 1.2-1.5 kg/m² per coat, 2.4-3.0 kg/m² total over two coats
Theoretical Yield, 18 kg pail: 6.0-7.5 m²
Practical Yield, 18 kg pail: 5.1-6.8 m², allowing 10-15% for wastage, substrate porosity and surface profile
Surface Dry: Approx. 3.5 hours @ 25°C, 50% RH†
Hard Dry: Approx. 7 hours @ 25°C, 50% RH†
Recoat Window: Minimum 8 hours, maximum 48 hours @ 25°C, 50% RH
Rain Resistant: After hard dry
Light Pedestrian Traffic: 7 days after the final coat
Full Cure: 7 days after the final coat
Application Temperature: 5-35°C ambient and substrate
Priming: None required at 4% substrate moisture or below on sound, clean, dry substrates; above 4%, two coats of ACTFLEX EP250
Flammability: Non-flammable and non-explosive
Storage Temperature: 5-35°C, protect from freezing
Shelf Life: 12 months, unopened, stored as specified
Warranty: 10 year Forspec Standard Product and Performance Warranty (supply of product only)
Compliance: No accredited third-party test report to an Australian Standard presently held; verification testing to AS 4654.1 has been programmed
* Manufacturer characteristic values determined under laboratory conditions, pending accredited verification testing to Australian Standards, not for engineering design without written confirmation from FORSPEC Technical Services
† Interpolated to 25°C and 50% RH from source values determined at 23°C

Product Files

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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 901 BUV is a one-component, water-based waterproofing membrane built on an exposure-grade emulsion and modified emulsified bitumen system, reinforced with selected fillers and performance additives. It cures to a tough, rough-textured film that stays exposed, with no screed, tiles or protection layer, and is trafficable for pedestrian use only. Manufacturer characteristic values include 100% minimum elongation, 0.5 MPa minimum adhesion to prepared concrete, water impermeability at 0.1 MPa sustained for 30 minutes, no flow, slip or drip at 140°C ± 2°C, and no cracking, delamination, blistering, adhesion failure or pinholing after 720 hours of artificial weathering. It is applied by brush or roller in two coats at 2.4-3.0 kg/m² to a 1.5 mm total dry film thickness. Uses cover exposed concrete roofs, trafficable terraces, sloped roofs and gutter lines, refurbishment of existing asphalt coatings and bituminous sheet membranes, and termination and detailing of FORZAFLEX sheet membrane systems. It is bitumen based and not compatible with the FORSPEC polyurethane range. No accredited third-party test report to an Australian Standard is presently held; verification testing to AS 4654.1 has been programmed.

View full technical data sheet

Key applications

Exposed concrete roofs and roof slabs
Trafficable terraces and walkable exposed decks - pedestrian traffic only
Sloped roofs and eaves gutter lines
Refurbishment and repair of existing asphalt waterproof coatings without removal
Refurbishment and repair of existing bituminous sheet waterproofing membranes without removal
Localised patch repair and re-coating of aged bituminous systems ahead of full replacement
Termination and detailing membrane for FORZAFLEX sheet membrane systems - laps, perimeter terminations, upstands, penetrations and outlets
Sealing and dressing of mechanically fastened and ballasted FORZAFLEX sheet edges

Surface suitability

Concrete (cured minimum 28 days; sound, clean, dry; wood-float or steel-trowel finish; free of laitance)
Cement render and screed (cured minimum 7 days; sound and non-friable)
Existing asphalt waterproof coatings (sound, well adhered, cleaned; loose and delaminated material removed)
Existing bituminous sheet membranes (sound, well adhered, cleaned; blisters cut and reinstated; laps sound)
FORZAFLEX sheet membranes (installed to the FORZAFLEX TDS; surface clean, dry and free of talc, dust and release agents)
Any approved substrate above 4% moisture (two coats of ACTFLEX EP250 moisture-suppressing primer required first)

Bitumen based and not compatible with the FORSPEC polyurethane range - never overcoat with, apply over, or detail using solvent-based or moisture-cured polyurethane products, including ACTFLEX 929 SL, ACTFLEX 929 HV, ACTFLEX 75FC and ACTFLEX MS PRO; corner junctions and detailing are carried out with FORSPEC bandage systems only. Never dilute with water or any thinner - dilution destroys film formation and voids all performance claims and warranty. Not for permanent immersion, tanks, pools, ponds or water-retaining structures. Not for negative-side hydrostatic pressure. Not for use beneath screeds, tiles or bonded finishes - this is an exposed system. Trafficable for pedestrian use only - not for vehicular traffic, wheeled loads, point loading or machinery. No slip resistance classification has been established - where a slip rating is required by the project or by AS 4586, confirm it before specifying. Do not apply over standing water, or over substrates that are damp, ponding, sanding, powdering or friable. Not approved over polyurethane or acrylic membranes or silicone-contaminated surfaces. ACTFLEX 901 BUV will not bond through a talced FORZAFLEX sheet surface - remove talc, dust and release agents first. Do not apply in windy, rainy, snowy or dusty conditions, and stop work immediately if rain begins; protect completed areas until the film has formed. Not recommended in extremely humid or poorly ventilated conditions, where film formation is compromised. Apply only between 5°C and 35°C ambient and substrate temperature. Do not attempt the full thickness in one pass - a heavy single coat skins over and traps water beneath, causing blistering. The grey-brown finish absorbs solar heat - where surface temperature is a design consideration, assess the effect on the substrate and on comfort underfoot before specifying. Protect from freezing - frozen product is not recoverable and must not be used.

Calculate your coverage

Enter area to cover (m²) m² Number of coats

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ACTFLEX 901 BUV 18Kg Bitumen UV Traffic

18kg pail

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Technical Specifications

Product Form	One-component water-based liquid, ready to use
Chemical Base	Exposure-grade emulsion and modified emulsified bitumen
Colour	Grey-brown
Packaging	18 kg pail
Solids Content	70% minimum*
Elongation at Break, untreated	100% minimum*
Elongation at Break, after acid, alkali or heat conditioning	80% minimum*
Adhesion to Prepared Concrete	0.5 MPa minimum*
Water Impermeability	Impermeable at 0.1 MPa sustained for 30 minutes*
Heat Resistance	No flow, slip or drip at 140°C ± 2°C*
Low-Temperature Flexibility, untreated	No cracking at -5°C*
Low-Temperature Flexibility, after conditioning	No cracking at 0°C*
Artificial Weathering (720 hours)	No cracking, delamination, blistering, adhesion failure or pinholing*
Total Dry Film Thickness	1.5 mm minimum over two coats, 0.75 mm DFT per coat
Consumption	1.2-1.5 kg/m² per coat, 2.4-3.0 kg/m² total over two coats
Theoretical Yield, 18 kg pail	6.0-7.5 m²
Practical Yield, 18 kg pail	5.1-6.8 m², allowing 10-15% for wastage, substrate porosity and surface profile
Surface Dry	Approx. 3.5 hours @ 25°C, 50% RH†
Hard Dry	Approx. 7 hours @ 25°C, 50% RH†
Recoat Window	Minimum 8 hours, maximum 48 hours @ 25°C, 50% RH
Rain Resistant	After hard dry
Light Pedestrian Traffic	7 days after the final coat
Full Cure	7 days after the final coat
Application Temperature	5-35°C ambient and substrate
Priming	None required at 4% substrate moisture or below on sound, clean, dry substrates; above 4%, two coats of ACTFLEX EP250
Flammability	Non-flammable and non-explosive
Storage Temperature	5-35°C, protect from freezing
Shelf Life	12 months, unopened, stored as specified
Warranty	10 year Forspec Standard Product and Performance Warranty (supply of product only)
Compliance	No accredited third-party test report to an Australian Standard presently held; verification testing to AS 4654.1 has been programmed
* Manufacturer characteristic values determined under laboratory conditions, pending accredited verification testing to Australian Standards, not for engineering design without written confirmation from FORSPEC Technical Services
† Interpolated to 25°C and 50% RH from source values determined at 23°C

Real Projects. Real Results.

View All Projects

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Gold Coast, QLD
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Sydney, NSW
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Perth, WA
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Frequently asked questions

View all FAQs

Can I use it with ACTFLEX 929, 75FC or MS PRO?

Compatibility
No. ACTFLEX 901 BUV is bitumen based and not compatible with the Forspec polyurethane range. Never overcoat it with, apply it over, or detail it with ACTFLEX 929 SL, 929 HV, 75FC or MS PRO. Corners and details are done with the FORSPEC bandage system only.
Can I put it over an old bitumen roof?

Application
Yes, if the existing asphalt coating or bituminous sheet membrane is sound and well adhered. Clean it, cut out blisters, remove loose and delaminated material and reinstate those areas first. At 4% substrate moisture or below, no separate primer is needed on sound existing bituminous surfaces.
How much does an 18 kg pail cover?

Coverage
At 2.4 to 3.0 kg/m² over two coats for 1.5 mm total DFT, an 18 kg pail covers 6.0 to 7.5 m² in theory. Allow 10 to 15% for wastage, porosity and surface profile, which gives 5.1 to 6.8 m² in practice. Open-textured concrete and aged bitumen surfaces sit at the upper end of the rate.
When can people walk on it?

Curing
Light pedestrian traffic is 7 days after the final coat, at 25°C and 50% RH. It is rain resistant once hard dry, approx. 7 hours. Cool, humid or enclosed conditions take longer, so check the film is dry on site. It is for foot traffic only, not vehicles, wheeled loads or machinery.
Is it certified to AS 4654.1?

Compliance
No. No accredited third-party test report to an Australian Standard is held yet, and the performance figures are manufacturer lab values. Verification testing to AS 4654.1 has been programmed. If your project needs a certified membrane, confirm the compliance pathway with Forspec Technical Services first.

ACTFLEX 901 BUV 18Kg Bitumen UV Traffic

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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