ACTFLEX MESH TAPE Mesh joint tape
Mesh-reinforced elastomeric waterproofing tape for thick-bodied membrane systems
Mesh-winged elastic tape for thick, coarse membranes that cannot soak through a fabric band.
ACTFLEX MESH TAPE sizes and key figures
Elastomeric core with open mesh wings, so thick acrylic, cementitious and pasty polyurethane membranes pass through and lock the tape in. For junctions, joints and crack reinforcement under membranes.
- Thickness
- 0.52 mmtypicaltypical · TDS p2
- Widths
- 2 sizes120/70 mm and 150/100 mm: total width / elastic centre · TDS p2
- Weight
- 38 g/mtypicaltypical · TDS p2
- Roll
- 25 mtypical8 rolls per carton, confirm against packaging · TDS p3
- Overlap
- 50 mmminimum, fully embedded in membrane · TDS p2
- Water pressure
- 1.5 bartypicalEN 1928 · TDS p2
- Cold flex
- −30°Ctypicalno cracking, SIA 280/3 · TDS p2
- Service temp
- −30 to +90°Ctypicalrange in service · TDS p2
- Hardness
- 70 Shore AtypicalISO 868 · TDS p2
From the FORSPEC data sheet, TDS-MESHTAPE · 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 ACTFLEX MESH TAPE is used
Use it for
- Floor-to-wall junctions in internal and external wet areas
- Under-tile waterproofing systems
- Expansion and construction joints within membrane systems
- Precast concrete panel seams and slab edge terminations
- Planter boxes, balconies, swimming pools and water tanks
- Structural crack reinforcement beneath membranes
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
- For thin-film brush-grade membranes use ACTFLEX FLEX TAPE instead
- Not a designed movement joint, and never left exposed
How to apply ACTFLEX MESH 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 fully.
- 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 elastomeric centre spans the junction and the mesh wings lie flat. Press it in from the centre out so the membrane saturates the mesh.
- 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 ACTFLEX MESH TAPE TDS before you start.
ACTFLEX MESH TAPE test reports and compliance
- AS/NZS 4858 wet area membranes
- Not applicable, the tape is a system componentCompliance is by the membrane system
- EN 1928 water pressure
- 1.5 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
Results as stated in the data sheet, TDS-MESHTAPE · Revision 1 · 25 August 2026. Warranty up to 25 years, depending on the system: ask FORSPEC which term applies to your system.
ACTFLEX MESH TAPE questions
Which membranes suit MESH TAPE?
Thick-bodied and coarse-consistency ones: rubber-modified acrylics, cementitious membranes and pasty polyurethanes. The TDS also lists polyurea and bitumen-based membranes as compatible.
What do the width numbers mean?
120/70 mm is a 120 mm tape with a 70 mm elastomeric centre and 25 mm of mesh wing each side. Pick a size where the centre fully spans the joint and the mesh bears on sound substrate both sides.
MESH TAPE or FLEX TAPE?
MESH TAPE for thick-bodied and coarse membranes. ACTFLEX FLEX TAPE for thin-film brush-grade membranes.
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.
Can I leave it exposed?
No. The tape must be overlaid with the approved membrane system, and it must never be embedded dry.
Used with ACTFLEX MESH TAPE
ACTFLEX MESH 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 MESH TAPE.