Kerakoll Biofast Rapid Setting Mineral Adhesive further information
Coverage: Grey (mixing ratio 26%) ≈ 1.4 kg/m2 per mm thickness
White (mixing ratio 29%) ≈ 1.3 kg/m2 per mm thickness
Kerakoll Biofast Eco Information
|Formulated with locally-sourced minerals meaning lower
greenhouse gas emission during transportation
|Contains recycled minerals thereby reducing the damage to
the environment caused by extracting pure raw materials
|Single-component; avoiding the use of plastic cans reduces
CO2 emissions and the need to dispose of special waste
Kerakoll Biofast Areas of Use
|Waterproofing products||Plasterboard||Lime and cement-based plasters/renders|
|Heating systems||Fibro-cement slabs||To overlay existing floors|
|Cement-based screeds||Gypsum and anhydrite||Impact noise insulation sheets|
|Concrete||Cellular concrete, for internal use||Rigid wood|
|Porcelain tiles||Large formats||Glass tiles|
|Laminated stoneware||Marble - natural stone||Thermal and acoustic insulation|
|Low thickness slabs||Recomposed materials||Terracotta - klinker|
|Ceramic tiles||Glass mosaics|
|Floors and walls||Saunas and spa||Street furniture|
|For internal use - external||Domestic||Marine|
|Terraces and balconies||Industrial|
Kerakoll Biofast Technical Data
|Shelf life||≈ 12 months in the original packaging in dry environment.|
Protect from humidity
|Adhesive thickness||from 2 to 15 mm|
|Temperature of the air, substrates and materials||from +5 °C to +35 °C||UNI 11493 - 8.3|
|Pot life at +23 °C|
|- Grey||≈ 1 hr|
|- White||≈ 1 hr|
|Open time at +23 °C (BIII tile):|
|- Grey||≥ 45 min.||EN 1346|
|- White||≥ 45 min||EN 1346|
|Correction time (BIII tile):|
|+23 °C||≥ 6 min|
|Time required until fully frost-proof (Bla tile)|
|- from +5 °C to -5 °C||≈ 3 hrs|
|Foot traffic/grouting of joints at +23 °C (BIa tile):|
|- Grey||≈ 3 hrs|
|- White||≈ 3 hrs|
|Grouting in walls at +23 °C (BIa tile)|
|- Grey||≈ 2 hrs|
|- White||≈ 2 hrs|
|Ready for use at +23 °C / +5 °C (BIa tile)|
|- light foot traffic||≈ 6 hrs|
|- heavy traffic||≈ 6 hrs|
|Coverage per mm thickness:|
|- Grey (mixing ratio 26%)||≈ 1.4 kg/m2|
|- White (mixing ratio 29%)||≈ 1.3 kg/m2|
Values taken at +23 °C, 50% R.H. and no ventilation. Data may vary depending on specific conditions at the building site, i.e.temperature, ventilation and absorbency level of the substrate and of the materials laid.
Kerakoll Biofast Performance
|VOC INDOOR AIR QUALITY (IAQ) - VOLATILE ORGANIC COMPOUND EMISSIONS|
Conformity EC 1 plus GEV-E
|Conformity||EC 1 plus GEV-Emicode||GEV Certified 6193/11.01.02|
|Shear adhesion (porcelain tiles/porcelain tiles) after 28 days||≥ 2 N/mm2||ANSI A-118.4|
|Tensile adhesion after 6 hrs||≥ 0.5 N/mm2||EN 1348|
|Tensile adhesion (concrete/porcelain tiles) after 28 days||≥ 1 N/mm2||EN 1348|
|- adhesion after heat ageing||≥ 1 N/mm2||EN 1348|
|- adhesion after water immersion||EN 1348|
|- adhesion after freeze-thaw cycles||EN 1348|
|- adhesion after straining cycles||SAS Technology|
|Vertical slip||EN 1348|
|Working temperature||from -40 °C to +90 °C|
Values taken at +23 °C, 50% R.H. and no ventilation. Data may vary depending on specific conditions at the building site.
Kerakoll Biofast Instructions For Use:
Preparation of the substrate
Substrates must comply with BS 5385, parts 1-5, be compact, free from substances that reduce adhesion such as dust, oil, grease and with no loose material. The substrate must be stable, non-deformable, without cracks and have already completed the curing period of hygrometric shrinkage.
Anhydrite screeds must have a residual moisture of ≤ 0.5 CM% and ≤ 0.3 CM% in the case of radiating floors.
Cement-based screeds must have a residual moisture of ≤ 2 CM% and ≤ 1.8 CM% in the case of radiating floors.
|Mixing water (EN 1348)||Mixing water on-site|
|-Grey||≈ 23% – 25% by weight||-Grey||≈ 4.8 l / 1 bag|
|-White||≈ 26% – 28% by weight||-White||≈ 5.4 l/1 bag|
The amount of water to be added, indicated on the packaging, is an approximate guide. It is possible to obtain mixtures with consistency of variable thixotropy according to the application to be made.
To guarantee structural adhesion it is necessary to apply a layer of adhesive sufficient to cover the entire back of the coating material. Large, rectangular sizes with sides > 60 cm and low thickness sheets may require adhesive to be applied directly to the back of the material.
Check samples to make sure the adhesive has been transferred to the back of the material.
Create elastic expansion joints:
– ≈ 10 m2 in external applications,
– ≈ 25 m2 in internal applications,
– every 8 metres in long, narrow applications.
Respect all structural, fractionizing and perimeter joints present in the substrates.
- Pre-treatment of special substrates
Gypsum-based plasters/renders, anhydrite screeds and cellular concrete, for internal use: Primer A Eco Vinyl sheets for interior use: Keragrip Eco
Please see the technical data sheet on how to use the Primers properly.
- Materials and special substrates
Marble and natural stone: materials that are subject to deformation or staining due to water absorption require a quick-setting or reactive adhesive.
Marble and natural stone in general may have characteristics that vary even with reference to materials of the same chemical and physical nature. For this reason it is essential you consult Kerakoll Global Service to request specific indications or to carry out a test on a sample of the material.
In the absence of specific indications from the manufacturer, natural stone slabs with reinforcement layers, in the form of resin coating, polymer mesh, matting, etc. or treatments (for example damp courses, etc.) applied on the laying surface must be tested in advance to ensure they are compatible with the adhesive.
Check for the presence of any really consistent traces of rock dust created during cutting, and remove them if found.
Waterproofing products: adherent and floating polymer sheets, liquid bitumen and tar-based sheets or membranes require application of a laying screed on top.
- Special applications
Insulating and soundproofing panels applied using spot adhesion as recommended by the manufacturers. Plasterboard and fibro-cement slabs must be firmly anchored to specific metal frames.
- Do not use
On metal, plastic or resilient materials, deformable substrates or subject to vibrations.
On screeds, plasters/renders, concrete not yet cured and affected by important drying shrinkage. On organic-based waterproofing products (such as RM according to EN 14891).
On smooth prefabricated concrete.
Product for professional use
– abide by any standards and national regulations
– do not use the adhesive to correct substrate irregularities greater than 15 mm
– protect from direct rainfall for at least 6 hrs
– the temperature, ventilation and absorption of the substrate and covering materials, may vary the adhesive workability and setting times
– use the right size of toothed spreader for the format of the tile or slab
– guarantee a full-bed in all external laying operations
– if necessary, ask for the safety data sheet
– for any other issues, contact the Kerakoll Worldwide Global Service