While it is mainly used up to 6 mm bed depth, it is suitable for use up to 12 mm in isolated areas. Larsen Trade Fast Set is suitable for fixing ceramic and porcelain tiles to most stable substrates and, with the inclusion of Larsen Flexibiliser, can be used on underfloor heating and overboarded timber.
£484.90 +VAT
Coverage: Approx. 4-5m2/20kg @ 3mm
| FORM: | Powder |
| STANDARD COLOUR(S): | Grey |
| HAZARD INFORMATION: | IRRITANT - Consult Safety Datasheet before use |
| CLEANING: | Clean tools, equipment etc. using warm water. Mechanical means are necessary when the product has set. |
| PACKAGING: | 20kg multiwall, sealed paper sacks |
| STORAGE CONDITIONS: | Store in sealed containers in dry conditions, protected from extremes of temperature |
| SHELF LIFE: | 6 months in unopened manufacturer's packaging |
| MIX PROPORTIONS: | Mix 20 kg powder with approx. 4.5L water |
| POT LIFE: | Approx. 45 minutes @ 20°C |
| APPLICATION TEMPERATURE: | +5°C to +30°C |
| BED THICKNESS: | 3- 6mm (up to 12mm in small isolated areas) |
| TIME TO TRAFFIC: | Grout after 3 hours Full Traffic after 6 hours Light Foot Traffic after 3 hours |
| COVERAGE: | Approx 4kg/m? @ 3mm bed |
| TENSILE ADHESION STRENGTH: | >0 5MPa under all test conditions |
| EARLY TENSILE ADHESION STRENGTH: | ≥0.5MPa after 6 hours |
| CLASSIFICATION: | EN12004 Type C1 F |
General All substrates must be suitably dry and comply with the recommendations in the British Standards and TTA Guidance documents. All substrates should be clean and thoroughly sound; they should be free from standing water, oils, grease, dust, loose particles or any other contaminants which may interfere with adhesion. Gypsum Based Screeds Gypsum based screeds require mechanical preparation by buffing, vacuuming etc. The screed must be tested to ensure it is dry (less than 0.5% moisture content measured by CM). All gypsum based screeds should be primed as follows: first coat Larsen Acrylic Primer diluted 1:1 with water and allowed to dry; second coat Acrylic Primer applied neat and allowed to dry fully. If particularly absorbent, subsequent coats may be required.
Gypsum Plaster Gypsum plaster on walls is suitable for a weight of tiles and adhesive of up to 20kg/m2. Plaster should not be dusty or overly polished and should be primed with Larsen Acrylic Primer. Underfloor Heating & Timber Substrates Only suitable with the use of Larsen Flexibiliser. Contact our Technical Department for further information. Movement Joints It is important to ensure that there is adequate provision of movement joints in all wall and floor tiling, It is recommended to follow the guidance provided in BS 5385 and by the Tile Association and proprietary joint manufacturers. Ideally, movement joints should be detailed by the designer at the outset. For further information or for situations which are not covered above, consult our website or contact our Technical Dept.
Larsen Acrylic Primer should be used to prime surfaces when required. On porous substrates, dilute 1:1 with clean water and allow to dry before applying adhesive. On impervious substrates, apply primer neat and allow to dry. Tiling should be carried out when the primer has dried clear but remains tacky.
The adhesive should be added to clean water (approx. 4.5L water/20kg) adhesive and mixed with a suitable forced action mixer or slow speed drill and paddle until a slump free mortar is produced. The mixed adhesive is usable for up to 45 minutes depending on site temperature and conditions. Do not attempt to remix adhesive or add extra water after it has begun to stiffen as this will cause a loss in performance.
The mixed adhesive should be applied to dry areas on walls using a suitable notched trowel and applied by solid bed on wet areas on walls, on all exterior tiling and on all floor tiling. In addition, when fitting large format tiles it is highly recommended to also fully skim the back of the tile with a thin layer of adhesive. Tiles should be placed with a firm twisting action before the adhesive has skinned over, i.e. within the open time. Regularly check to ensure adequate contact between adhesive, tile and substrate. ‘Dot and Dab’ method of fixing is not suitable.
Only grout when the tile adhesive has set. Typically this is within 18 hours for standard setting adhesives and within 3 hours for fast setting adhesives.
‘Dot and Dab’ method of fixing is not suitable. Tiles should not be fixed to wooden substrates externally or in wet areas. Excessive deflection/movement resulting from incorrect preparation will result in cracking of tiles and/or debonding. Floating Timber and Laminate floors are not recommended substrates for direct fixing of rigid floor finishes. Pale coloured marble/porcelain can be translucent and dark coloured adhesive can sometimes show through. If in doubt we would always recommend tiling a small trial area using a white adhesive and back buttering the tiles to ensure a uniform adhesive coverage. Cement-based products will take longer to harden and set at lower temperatures, and should not be used below 5°C. All tiling should be carried to current best practice, including British Standards and TTA Guidance documents.
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