Description
GROUT SEAL is a pre-formed, ether-based polyurethane foam tape designed to prevent grout loss through butt joins and gaps in formwork during concrete casting. The closed-cell foam compresses to fill gaps and returns to shape, providing a temporary seal that simplifies formwork operations and produces cleaner, defect-free concrete edges.
Available Pack Size
• 10 mm x 20 mm x 10 m (roll)
Stock Status
In Stock
Product Highlights
- Ether-based polyurethane closed-cell foam tape
- Prevents grout loss and leakage through formwork joints
- Compressible and resilient — good recovery after compression
- Easy to apply — self-adhesive or friction-fit depending on profile
- Reduces cleaning time and improves concrete finish quality
Technical Specifications
| Property | Specification |
|---|---|
| Material | Ether-based polyurethane closed-cell foam |
| Typical Cross Section | 10 mm x 20 mm |
| Roll Length | 10 m |
| Compression Resistance | Good; designed for repeated compression and recovery |
| Temperature Range | -30°C to +80°C (typical) |
| Water Absorption | Low (closed-cell) |
Application Instructions
- Surface Prep: Ensure formwork faces are clean and dry.
- Installation: Place GROUT SEAL tape into the butt joint or gap so the tape compresses slightly when formwork is assembled. For non-adhering profiles, use adhesive or staple as required.
- During Pour: The tape forms a temporary seal that prevents cement paste and grout passing through the joint. After stripping, remove any remaining tape.
- Note: Select tape profile/size to suit gap; do not use as permanent joint filler or waterproofing.
Coverage / Yield
- One 10 m roll at 10 mm x 20 mm covers 10 linear metres of joint.
Suitable Applications
- Formwork butt joints and connections
- Precast element joint protection during casting
- Temporary sealing of gaps to prevent grout loss
Compatibility & Limitations
- Not a permanent sealant — remove after formwork stripping and finish joint as required.
- Avoid prolonged exposure to UV if left exposed onsite for extended periods.
Safety & Handling
- Cut tape using scissors or a knife with appropriate PPE.
- Dispose of removed tape and waste according to local regulations.
Frequently Asked Questions
It’s used to prevent grout loss through butt joins and gaps in formwork during concrete casting.
Ether-based polyurethane closed-cell foam.
Supplied as 10 mm x 20 mm x 10 m roll (other sizes can be specified on request).
Place into joint or gap so it compresses when formwork is assembled; adhesive or mechanical fixing can be used if required.
It minimizes grout passage during pouring but is not a permanent waterproofing product.
Generally designed as a temporary single-use product; reuse depends on condition after removal.
One roll = 10 linear metres at the stated cross-section.
Typical operating range -30°C to +80°C.
Minimal; avoid inhaling dust from cutting and dispose of waste responsibly.
Yes — commonly used on precast formwork joints to prevent grout loss.
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