Description
The Larsen Fibreflex Semi-Rapid Set+ in white is a fully flexible, S1-rated, microfibre-reinforced, non-slip, cement-based tile adhesive with advanced GEL technology. The white formulation is the preferred choice when working with light-coloured, translucent, or glass tiles where a grey adhesive bed could affect the finished appearance.
Its specially formulated semi-rapid setting binder delivers a practical pot life and open time followed by rapid strength development — making it the professional choice where time on site is critical without sacrificing working ease. This full pallet — 48 x 20kg bags with tail lift delivery — is designed for large commercial projects and trade contractors.
Key Benefits
- White formulation – ideal for light, translucent, or glass tiles where adhesive colour is visible
- GEL technology – soft, thixotropic formula ideal for large-format tiles
- Microfibre-reinforced – added tensile strength and crack resistance
- Fully flexible S1-rated – absorbs movement and thermal stress
- Semi-rapid set – grout after just 6 hours, full traffic at 12 hours
- Long pot life with rapid subsequent strength gain
- Non-slip formula – safe for wall and overhead applications
- BS EN 12004 Type C2TES1 certified
Applications
Suitable for interior and exterior floor and wall tiling. Particularly recommended where adhesive colour may show through — white-bodied porcelain, glass mosaics, translucent natural stone, and light-coloured large-format tiles. Also ideal for demanding environments including externally exposed areas, wetrooms, and projects requiring a fast return-to-service time.
Technical Specifications
- Classification: BS EN 12004 Type C2TES1
- Colour: White
- Form: Powder
- Pack Size: 20kg bag
- Pallet Quantity: 48 bags (tail lift delivery)
- Coverage: Approx. 4m² per 20kg bag @ 3mm bed
- Bed Thickness: 3–12mm (up to 20mm in small isolated areas)
- Mixing Ratio: 20kg bag to approx. 5–6L water
- Pot Life: Approx. 2 hours @ 20°C
- Setting Time: Approx. 4–5 hours @ 20°C
- Open Time: ≥30 minutes
- Grout After: 6 hours
- Light Foot Traffic: 6 hours
- Full Traffic: 12 hours
- Application Temperature: +5°C to +30°C
- Tensile Adhesion Strength: ≥1 MPa under all test conditions
- Transverse Deformation: ≥2.5mm
- Slip: ≤0.5mm
- Shelf Life: 6 months in unopened original packaging
- Storage: Store in sealed containers in dry conditions, protected from extremes of temperature
- Packaging: 20kg multiwall sealed paper sacks
- SKU: M454W20
What's Included
- 48 x 20kg bags of Larsen Fibreflex Semi-Rapid Set+ White tile adhesive
- Tail lift delivery included
Frequently Asked Questions
When should I use white adhesive instead of grey?
White adhesive is recommended for light-coloured, translucent, or glass tiles where a grey adhesive bed could show through and affect the visual finish of the installation.
What is GEL technology and why does it matter?
GEL technology gives the adhesive a soft, thixotropic consistency that stays put on the trowel and on the wall — making large-format tiles far easier to position and adjust without slumping.
What is the difference between Semi-Rapid Set+ and Standard Set+?
Semi-Rapid Set+ has a shorter grout time (6 hours vs 18 hours) and reaches full traffic strength in 12 hours rather than 24. It suits projects where a faster turnaround is needed without sacrificing working time.
Can it be used externally?
Yes. The S1 flexible rating and microfibre reinforcement make it well suited to external applications where thermal and structural movement must be accommodated.
How long is the pot life?
Approximately 2 hours at 20°C. Work in smaller batches in warmer conditions.
Why buy a full pallet?
A full pallet of 48 bags provides the best value per bag and includes tail lift delivery, ideal for large commercial projects and trade stockists.
Millcot supplies trade professionals with the products they trust. All orders are dispatched promptly with full product support available from our team.
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