ACTFLEX 5000 Self-adhesive sheet
Self-adhesive polymer resin sheet membrane with cross-laminated HDPE reinforcement
Non-asphalt peel-and-stick Class III sheet membrane. No torch and no site adhesives.
How ACTFLEX 5000 goes on
ACTFLEX 5000 sizes and key figures
Self-adhesive sheet membrane for non-exposed external wet areas: basement walls, planter boxes, retaining walls, lift shaft walls and protected decks. It suits sites where open flame is prohibited.
- Class
- Class IIIAS 4654.1-2012, fully bonded, non-exposed sheet · TDS p1
- Elongation
- 374%at break, AS 1145.3, XTecGen Report 373 · TDS p2
- Tensile strength
- 3.19 MPaAS 1145.3, XTecGen Report 373 · TDS p2
- Peel bond
- 13.19 Npeel force to concrete primed with ACTFLEX EP 250 · TDS p2
- Laps
- 75 mmtypicalside and end laps, rollered along the full length · TDS p2
- Apply at
- +5°C to +35°Ctypicalbelow 5°C confirm adhesion on a trial area first · TDS p2
- Cover
- Immediatelytypicalafter lap inspection, protection board or backfill · TDS p4
- Detail strip
- 300 mmtypicalat every internal corner and penetration · TDS p3
- Puncture
- ≥ 200 Ntypicaltypical R&D value · TDS p2
From the FORSPEC data sheet, TDS-ACTFLEX5000 · Revision 2 · 9 November 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 5000 on site
More FORSPEC jobs
Where ACTFLEX 5000 is used
Use it for
- Basement walls and below-ground structures
- Planter boxes and landscaped areas
- Retaining walls and foundation walls
- External lift shaft walls
- Protected decks, including under pedestal pavers
- Underground and external works where open flame is prohibited
Know before you start
- Non-exposed only: cover it, never leave it permanently exposed to UV
- Not an exposed trafficable surface
- Not a substitute for structural crack repair
- Not over frost, standing water, sharp projections or protruding fixings
How to apply ACTFLEX 5000
- 01
Prepare
Concrete cured 28 days minimum, clean and free of laitance, oil and curing compounds, with no standing water or frost. Remove fins and sharp points. Form a smooth cove at internal corners.
- 02
Prime
Apply ACTFLEX EP 250, the primer used for the AS 4654.1 testing, and let it dry before the sheet goes down.
- 03
Detail
Lay a separate 300 mm detail strip at every internal corner, floor-to-wall junction and penetration before the main sheet, and roller it into both planes.
- 04
Lay
Position the sheet dry, peel the liner progressively and bed it from one edge, excluding air. Never drop it flat. Run laps with the fall, and roll the whole area with a pressure roller.
- 05
Lap and finish
Overlap side and end laps 75 mm onto the self-adhesive selvedge and roller every lap along its full length. Terminate into a fixed and sealed reglet or termination bar.
- 06
Cover
Inspect and probe-test every lap, then cover promptly with protection board, backfill, topping or finish. It is not UV stable.
A short guide from the data sheet. Read the full ACTFLEX 5000 TDS before you start.
How many rolls of ACTFLEX 5000 do I need?
Self-adhesive sheet membrane, 20 m² roll
Roll 1 m × 20 m = 20 m² gross. Take-off: measured area plus upturns, plus 20% for the 75 mm laps (about 10%) and waste (about 10%). Each drop runs top to bottom and 200 mm onto the footing. A 300 mm detail strip runs along the wall base. Primer: ACTFLEX 300 (15 L, 45 to 75 m², 45 used); damp or poor substrate, EP 250 two coats at 0.32 kg/m² each (4 kg kit, about 6.25 m²).
You need
0 rolls
Where the figures come from
Roll 1 m × 20 m = 20 m² gross. Take-off: measured area plus upturns, plus 20% for the 75 mm laps (about 10%) and waste (about 10%). Each drop runs top to bottom and 200 mm onto the footing. A 300 mm detail strip runs along the wall base. Primer: ACTFLEX 300 (15 L, 45 to 75 m², 45 used); damp or poor substrate, EP 250 two coats at 0.32 kg/m² each (4 kg kit, about 6.25 m²).
- Take-off basis: measured area plus upturns, plus 20% for laps and waste. TDS-ACTFLEX5000, R2, 9 Nov 2026, page 3
- Lap; detail strip: 75 mm on every side and end lap; 300 mm strip at internal corners and penetrations. TDS-ACTFLEX5000, R2, 9 Nov 2026, page 3
- Roll size: 1 m × 20 m, 20 m² gross. FORSPEC system figure
- Drop carried onto the footing: 200 mm. FORSPEC system figure
- ACTFLEX 300 tack coat: 15 kg pail primes about 45 to 75 m² per coat (45 used). TDS-ACTFLEX300, R2, 12 Aug 2026, page 3
- EP 250 two coats: 0.64 kg/m². TDS-EP250, R4, 12 Nov 2026, page 3
More: ACTFLEX 5000 product page · Below ground system · Balconies & podiums system
Learn to install it
Hands-on FORSPEC training that covers ACTFLEX 5000.
Where it has been used
FORSPEC projects built with ACTFLEX 5000.
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 5000 test reports and compliance
- AS 4654.1-2012
- Complies, Class III, fully bonded non-exposed sheetXTecGen NATA Report 373, valid to 19/02/2028
- AS 4654.1 Appendix B
- Pass, 50 cycles, no rupture, crazing or tearsXTecGen Report 373
- Water immersion, 56 days
- Pass, 254% elongation at breakXTecGen Report 373
- Detergent immersion, 56 days
- Pass, 370% elongation at breakXTecGen Report 373
- Heat ageing
- Pass, 522% elongation at breakXTecGen Report 373
- ASTM E96
- 0.18 g/m²/24 h water vapour transmissionXTecGen Report 373
Download the reports
Results as stated in the data sheet, TDS-ACTFLEX5000 · Revision 2 · 9 November 2026. Warranty up to 25 years, depending on the system: ask FORSPEC which term applies to your system.
ACTFLEX 5000 questions
Does ACTFLEX 5000 need a torch?
No. It is peel-and-stick, with a factory self-adhesive selvedge for the laps, so no torching and no site adhesives are needed. It suits sites where open flame is prohibited.
What primer goes under ACTFLEX 5000?
ACTFLEX EP 250, the primer used for the AS 4654.1 testing. Apply it and let it dry before the sheet goes down.
How much overlap do I need?
A minimum of 75 mm on side and end laps, onto the self-adhesive selvedge. Roller every lap firmly along its full length. For take-off use the measured area plus upturns, plus 20% for laps and wastage.
Can I leave ACTFLEX 5000 exposed?
No. It is for non-exposed use only. Cover it with the specified protection, backfill, topping or finish. It is not UV stable and not an exposed trafficable surface.
When can I cover it?
Immediately after the laps are rolled, inspected and probe-tested. Protection board, backfill, topping, screed or tiling can follow straight away. There is no cure period for adhesion.
When should I use ACTFLEX 5000S instead?
Use ACTFLEX 5000S where a bonded topping slab is poured directly onto the membrane and chemical fusion to the topping is needed. ACTFLEX 5000 is the general-purpose sheet.
Used with ACTFLEX 5000
ACTFLEX 5000 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 5000.