SUPERFLEX JOINT TAPE Felt-faced joint tape
Three-layer TPE waterproofing tape, felt-faced both sides, for structural and cold joints
Felt-faced TPE tape, 100 to 700 mm wide, that the membrane bonds to from above and below.
SUPERFLEX JOINT TAPE sizes and key figures
Three-layer TPE tape with felt on both faces for movement joints, cold joints, corners and wall-to-floor junctions. Edge perforations let liquid membrane pass through and key in from both sides.
- Widths
- 100–700 mmcustom widths available · TDS p2
- Roll
- 50 mper roll · TDS p2
- Thickness
- 0.65 ± 0.1 mmtypicaltypical · TDS p2
- Elongation
- > 320%typicalat break, transverse · TDS p2
- Water pressure
- > 1.5 bartypicalmanufacturer data · TDS p2
- Service temp
- −30 to +90°Ctypicalrange in service · TDS p2
- Overlap
- 50 mmminimum, fully embedded in membrane · TDS p2
- Pre-fill
- > 3 mmcracks and static joints wider than this · TDS p3
- Linear demand
- Length + 10%plus 50 mm per lap, for detailing and wastage · TDS p2
From the FORSPEC data sheet, TDS-SUPERFLEX · 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.
Where SUPERFLEX JOINT TAPE is used
Use it for
- Bathrooms, laundries and commercial kitchens
- Balconies, terraces, rooftops and planter boxes
- Retaining walls, swimming pools and water tanks
- Horizontal and vertical wall-to-floor junctions
- Cold joints, chamfers and precast panel seams
- Under-tile systems using C2-class adhesives
Know before you start
- Not a stand-alone waterproofing product: it works inside a full system
- Never embed dry: the membrane must wet out the tape from beneath
- Not a designed movement joint, and never left exposed
- Tile adhesive only after the membrane has fully cured
How to apply SUPERFLEX JOINT TAPE
- 01
Prepare
Clean, dry, sound surface free of laitance, dust, oil and sealers. Keep junction zones smooth for at least 200 mm each way, including the wall upturn. Prime if the system needs it.
- 02
Pre-fill
Fill cracks and static joints wider than 3 mm with ACTFLEX 75FC or ACTFLEX MS PRO, tooled flush, and let it cure.
- 03
Base coat
Apply a generous wet base coat of the specified FORSPEC membrane, wide enough for the full tape plus margin on both sides.
- 04
Embed
While wet, centre the tape so the elastic centre spans the junction and the felt faces lie flat. Press it in from the centre out so the membrane saturates the felt.
- 05
Second coat
Let the base coat partly set, then coat over the whole tape to encapsulate it. Overlap ends by at least 50 mm, fully embedded.
- 06
Corners
Internal corners: cut at 45° and lap or mitre. Use preformed corner units for critical detailing, lapped at least 50 mm onto the running tape.
A short guide from the data sheet. Read the full SUPERFLEX JOINT TAPE TDS before you start.
Learn to install it
Hands-on FORSPEC training that covers SUPERFLEX JOINT TAPE.
SUPERFLEX JOINT TAPE test reports and compliance
- AS/NZS 4858 wet area membranes
- Not applicable, the tape is a system componentCompliance is by the membrane system
- Water pressure resistance
- > 1.5 bar, manufacturer dataForspec R&D
- AS ISO 13007 tile adhesive
- Suitable for direct embedment beneath C2-class adhesivesDesign responsibility of the specifier
- VOC certification
- Not currently heldCertificate to be commissioned
Results as stated in the data sheet, TDS-SUPERFLEX · Revision 1 · 25 August 2026. Warranty up to 25 years, depending on the system: ask FORSPEC which term applies to your system.
SUPERFLEX JOINT TAPE questions
What widths and roll length are available?
Widths from 100 mm to 700 mm, with custom widths available, in 50 m rolls. Choose a width so the elastic centre fully spans the joint with felt bearing on sound substrate both sides.
Can I tile over it?
Yes, once the membrane has fully cured. It is suitable for direct embedment beneath C2-class adhesives under AS ISO 13007, and ACTFLEX BIOSET is the FORSPEC system-tested adhesive.
Why is it felt on both sides?
The membrane bonds from above and below at once. Perforations along both felt edges let membrane pass through for a mechanical key from both directions.
How much tape do I need?
Measured junction length plus 50 mm per lap and 10% for detailing and wastage. Allow one preformed unit, or 300 mm of running tape, per corner.
Which membranes can I use it with?
Flexible cementitious and brush-grade polyurethane membranes, and most liquid-applied and cementitious membranes. Confirm the tape, membrane and adhesive with a FORSPEC technical representative.
Used with SUPERFLEX JOINT TAPE
SUPERFLEX JOINT 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 SUPERFLEX JOINT TAPE.