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A fast-setting adhesive of quiet authority, Fibreflex Rapid Set+ is engineered for precision work where time, movement, and substrate variability must all be reconciled. Its S1 deformability allows it to absorb stress without compromise, while the rapid cure returns surfaces to service within hours, not days.
Formulated for both interior and exterior use, it fixes with equal assurance to floors and walls, accommodating everything from fine glass mosaics to dense porcelain and natural stone. It performs without hesitation on more demanding bases—heated screeds, over-boarded timber, and even swimming pools—where lesser adhesives tend to falter.
This is a material designed not to be noticed once applied, which is perhaps the highest compliment any adhesive can earn.
Key Features
- Rapid set formulation — grout after just 3 hours
- Fully flexible (S1 rated) to accommodate movement
- Suitable for walls and floors, internal and external use
- Bonds a wide range of tiles including porcelain, natural stone, and glass mosaics
- Reliable on challenging substrates including underfloor heating and timber overlays
- High-performance adhesion for wet environments, including swimming pools
- Smooth working consistency with extended pot life for a rapid-set system
| Property | Details |
|---|---|
| Product Name | Larsen Professional Fibreflex Rapid Set+ |
| Colour | White |
| Size | 20kg Bag |
| Classification | BS EN 12004 Type C2FS1 |
| Form | Powder |
| Bed Thickness | 3–12mm (up to 20mm in isolated areas) |
| Coverage | ~4kg/m² at 3mm bed |
| Mix Ratio | Approx. 4.5L water per 20kg |
| Pot Life | ~45 minutes at 20°C |
| Grouting Time | After 3 hours |
| Light Foot Traffic | After 3 hours |
| Full Traffic | After 6 hours |
| Application Temperature | +5°C to +30°C |
| Suitable Tile Types | Ceramic, porcelain, natural stone, marble, glass, mosaics |
| Substrates | Concrete, screeds, heated floors, over-boarded timber |
| Cleaning | Water before set; mechanical removal after curing |
| Packaging | 20kg sealed multiwall paper bag |
| Storage | Dry conditions, sealed, protected from temperature extremes |
| Shelf Life | 6 months unopened |
| Hazard Class | Irritant |
