EXPANDOFLEX JOINT TAPE Expansion joint tape
Epoxy-bonded TPE expansion joint waterproofing tape for structural movement joints
Corrugated TPE joint tape, epoxy-bonded each side with PROBOND 1100, centre left free to move.
EXPANDOFLEX JOINT TAPE sizes and key figures
Heat-weldable thermoplastic elastomer tape for expansion and movement joints, base-to-wall transitions and tunnel, podium and tank joints. Only the flanges are bonded, the corrugated centre stays free.
- Thickness
- 1.0–2.0 mm1.0, 1.25, 1.5 or 2.0 mm · TDS p2
- Widths
- 150–400 mm150, 200, 250, 300, 350, 400 mm, custom to order · TDS p2
- Roll length
- 25 mper roll · TDS p2
- Tensile
- 4.8 / 4.7 MPatypicallongitudinal / transverse, EN ISO 527-3 · TDS p2
- Elongation
- 532 / 580%typicalat max load, longitudinal / transverse · TDS p2
- Water pressure
- > 5 bartypicalEN 1928 · TDS p2
- Service temp
- −30 to +80°Ctypicalno cracking at −30°C · TDS p2
- Apply at
- +5 to +35°Cambient and substrate · TDS p3
- Epoxy width
- 40 mmper side for 200 mm tape, min 40 mm per face at corners · TDS p3
From the FORSPEC data sheet, TDS-EXPANDOFLEX · 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 EXPANDOFLEX JOINT TAPE is used
Use it for
- Horizontal and vertical expansion joints
- Structural and seismic joints, subject to engineer design
- Base-to-wall transitions and parapets
- Tunnel, retaining wall and podium slab joints
- Concrete-to-steel and dissimilar-material transitions
- Water tanks, swimming pools and wastewater tanks
Know before you start
- Not for load transfer: it seals the joint and carries no structural load
- Never put epoxy on the centre zone: an adhered centre cannot flex and tears
- Joint width, movement class and displacement are the engineer's call
- Not below 5°C or above 35°C, or on damp, frosted or friable concrete
Its FORSPEC systems
How to apply EXPANDOFLEX JOINT TAPE
- 01
Prepare
Grind or shot blast both bonding faces to clean, sound, dry concrete, then vacuum. Repair voids and blowholes with FORBUILD 100 or FORCRETE 100, flush and cured.
- 02
Cut and weld
Pre-cut with a clean knife or shears. Heat-weld longer runs with a hot air gun, edge to edge under pressure. Warm the tape slightly in cold conditions.
- 03
Mix epoxy
Mix PROBOND 1100 Part A and B at 300–400 rpm for 2–3 minutes until streak-free. Pot life is about 30–40 minutes at 20°C. Never thin, extend or re-temper.
- 04
Bond
Trowel PROBOND 1100 on each side at 1.0–1.5 mm, 40 mm wide per side for 200 mm tape. Centre the tape, press the flanges in and roll. No epoxy in the centre.
- 05
Cap
Cap the embedded flanges with 1.0–1.5 mm of PROBOND 1100, running past the tape edge. Do not cap the central movement zone.
- 06
Protect
Keep rain, moisture, load and vibration off for about 24–48 hours at 20°C. Flood test only after full epoxy cure and inspection.
A short guide from the data sheet. Read the full EXPANDOFLEX JOINT TAPE TDS before you start.
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.
EXPANDOFLEX JOINT TAPE test reports and compliance
- EN ISO 527-3 tensile
- 4.8 MPa long., 4.7 MPa transverse, manufacturer dataForspec R&D
- EN 1928 water pressure
- > 5 bar, manufacturer dataForspec R&D
- SIA 280/3 cold flexibility
- No cracking at −30°C, manufacturer dataForspec R&D
- ISO 868 hardness
- 70 Shore A, manufacturer dataForspec R&D
- DIN 16860 peel from epoxy
- > 20 N per 10 mm, manufacturer dataForspec R&D
Results as stated in the data sheet, TDS-EXPANDOFLEX · Revision 1 · 25 August 2026. Warranty up to 25 years, depending on the system: ask FORSPEC which term applies to your system.
EXPANDOFLEX JOINT TAPE questions
Which adhesive do I use?
PROBOND 1100, a two-part epoxy. Apply it only to the bonding flanges at 1.0–1.5 mm on standard surfaces, plus a capping layer of the same thickness. Alternatives need written FORSPEC confirmation.
What is the recessed saw-cut option?
Saw-cut a chase 5 mm wide and 15 mm deep along the joint, fill it with PROBOND 1100 to at least 5 mm DFT and insert the flange. Specify it for traffic, wear, high-load areas or a flush finish.
How do I handle high movement?
Form a downturn loop into the joint void, with the geometry set by the project engineer. Bond only the side flanges. The loop hangs free of adhesive.
How long is a roll and how do I join it?
Rolls are 25 m. Heat-weld sections with a hot air gun for continuous runs and field-fabricated corners.
Can it carry load?
No. It waterproofs the joint but does not carry structural load, and it is not a substitute for movement joint design.
Used with EXPANDOFLEX JOINT TAPE
EXPANDOFLEX 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 EXPANDOFLEX JOINT TAPE.