ACTFLEX SA TAPE Butyl sealing tape
Self-adhesive butyl sealing tape with fleece membrane-bonding face
Self-adhesive butyl tape with a fleece face that liquid membranes bond straight onto, with no cure wait.
ACTFLEX SA TAPE sizes and key figures
Butyl tape with a white polypropylene fleece face for pipes, floor wastes, junctions and slab edges. Peel, roll it down, then coat over it with the liquid membrane straight away.
- Thickness
- 1.0 mmtypicalbutyl with polypropylene fleece face · TDS p2
- Widths
- 100–300 mm100, 150, 200 and 300 mm · TDS p2
- Roll
- 20 mtypical6 rolls per carton, confirm against packaging · TDS p2
- Overlap
- 50 mmminimum on ends and junctions · TDS p2
- Apply at
- 0°C to +40°Cambient and substrate · TDS p2
- Service temp
- −40 to +100°Conce covered by the membrane · TDS p2
- Peel adhesion
- 22 N/cmtypicaltypical · TDS p2
- Elongation
- > 300%typicalat break · TDS p2
- Stop short
- 10–20 mmbelow the finished tile or finish level · TDS p3
From the FORSPEC data sheet, TDS-SATAPE · Revision 1 · 25 August 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 SA TAPE on site
More FORSPEC jobs
Where ACTFLEX SA TAPE is used
Use it for
- Wall-to-floor and wall-to-wall junctions ahead of membrane
- Pipe and service penetrations, taps and outlets
- Floor waste flange detailing
- Shower recesses, balconies and planter boxes
- Precast panel joints and slab edges
- Membrane terminations and bond-breaker at transitions
Know before you start
- Not a stand-alone waterproofing product: it works inside a full system
- Not to be left exposed: UV resistance is moderate, cover it with the membrane
- FORSPEC liquid membranes only. Sheet systems need written FORSPEC confirmation
- Not a substitute for a designed movement joint
How to apply ACTFLEX SA TAPE
- 01
Prepare
Substrate clean, dry, sound and free of laitance, dust, oil and curing compounds. Keep junction zones smooth for at least 200 mm each way, including the wall upturn.
- 02
Prime
Prime AAC blocks and porous concrete first, using ACTFLEX EP250, ACTFLEX 500 NP PRIMER or ACTFLEX SUPERPRIME 008 as the system needs. Let the primer dry fully.
- 03
Lay
Peel the liner and lay the tape without creases or trapped air. Embed it with a pressure roller, and overlap ends and junctions by at least 50 mm. Do not stretch it.
- 04
Detail
Floor waste or tap: star cut, wrap and roll tight around the fitting. Pipe: cut to shape, wrap with a vertical overlap and seal the butyl round the pipe.
- 05
Finish edge
Stop the tape 10–20 mm below the tile or finish level. Internal corners: cut at 45° and lap or mitre. In the cold, pre-warm tape and substrate with a heat gun on low.
- 06
Cover
Coat over the fleece with the approved membrane straight away. There is no cure period, and the tape must not be left exposed.
A short guide from the data sheet. Read the full ACTFLEX SA TAPE TDS before you start.
ACTFLEX SA TAPE test reports and compliance
- AS/NZS 4858 wet area membranes
- Not applicable, the tape is a system componentCompliance is by the membrane system
- Accelerated ageing
- Passed 1000 hours, manufacturer dataForspec R&D
- Water vapour transmission
- < 0.1 g/m²/day, manufacturer dataForspec R&D
Results as stated in the data sheet, TDS-SATAPE · Revision 1 · 25 August 2026. Warranty up to 25 years, depending on the system: ask FORSPEC which term applies to your system.
ACTFLEX SA TAPE questions
Do I have to wait before coating over ACTFLEX SA TAPE?
No. Adhesion develops as soon as the tape is rolled, and the membrane goes over the fleece straight after installation. Do not leave the tape exposed, as its UV resistance is moderate.
What sizes does it come in?
Widths of 100, 150, 200 and 300 mm. A roll is 20 m and a carton holds 6 rolls. The TDS says to confirm roll and carton quantities against current packaging before ordering.
Can I use it with a sheet membrane?
Only with written FORSPEC confirmation. It is approved for FORSPEC liquid membrane systems.
How do I detail a floor waste or a pipe?
Floor waste: star cut the tape over the flange, press it round the edge with a roller, then extend the membrane over the fleece. Pipe: cut to shape, wrap with a vertical overlap, seal the butyl and reinforce with the membrane.
Do I need a primer?
Yes on AAC blocks and porous concrete. Use ACTFLEX EP250, ACTFLEX 500 NP PRIMER or ACTFLEX SUPERPRIME 008 to suit the substrate, and let it dry fully first.
What is it not for?
It is not a stand-alone waterproofing product and not a movement joint. Do not install below 0°C or above 40°C, or over damp, dusty or contaminated surfaces.
Used with ACTFLEX SA TAPE
ACTFLEX SA TAPE TDS and SDS
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 SA TAPE.