Sopro VF HF 420 – VarioFlex® High Strength Flexible Tile Adhesive
Extra-rapid-set, early-high-strength, flexible, cementitious floating-bed tile adhesive, meeting C2 EF requirements to DIN EN 12004. Ideal for fast-track or tightly scheduled schemes. For trouble-free laying of dishing/curling-prone resin-bonded tiles, large-format units, cast stone units, earthenware, stoneware and fully vitrified stoneware tiles. For laying dark-coloured, deformation-sensitive natural stone units. Suitable for use in conjunction with floor heating and waterproof membranes. High reliability through full rear-face wetting and contact adhesion, plus high crystalline water-binding capacity.
Coverage: Approx. 1.4 kg / m² / mm
Field Of Application
For dishing-prone resin-bonded tiles 2), cast stone and terrazzo tiles, earthenware, stoneware and fully vitrified stoneware tiles, mosaic, terracotta, discolouration-resistant natural stone units in marble, granite, etc. Also suitable as a bonding and contact layer in conjunction with the thick-bed method, e.g. for rapidset mortars incorporating Sopro Rapidur® B1 turbo binder. In commercial and industrial facilities, hospitals, public buildings, airports, railway stations, etc.
Related Downloads
TDS Sopro VF HF 420 – VarioFlex® High Strength Flexible Tile Adhesive
TDS SMET_Tiling Onto Calcium Sulphate Floor Screed_System I
SMET Professional Tiling Systems Brochure
Featured Benefits of Sopro VF HF 420 – VarioFlex® High Strength Flexible Tile Adhesive
- For floors, indoors and outdoors
- C2: tensile adhesion strength ≥ 1.0 N/mm²
- E: extended open time ≥ 30 minutes
- F: early tensile adhesion strength ≥ 0.5 N/mm² after 6 hours
- Sopro VF HF 420 achieves 0.5 N/mm² after only 90 minutes; 1.0 N/mm² after only 3 hours
- Walkable and groutable: after approx. 2 hours
- Fully loadable: after approx. 5 hours
- Low-chromate to Regulation (EC) No 1907/2006, Annex XVII
Technical Details Sopro VF HF 420 – VarioFlex® High Strength Flexible Tile Adhesive
| Wall and floor heating | Suitable |
| Mixing Ratio (water only) | 5.5 – 6.0 ltr water: 25 kg Sopro VF HF 420 |
| Coverage | Approx. 1.4 kg/m² per mm coat thickness |
| Maturing Time | 3-5 minutes |
| Pot Life | 30–45 minutes; stiffened mortar must not be retempered by adding water or fresh mortar to restore workability. |
| Open Time | Approx. 30 mins |
| Walkable / Groutable | After approx. 3 hours or after setting the adhesive; take measures to spread loads over the floor |
| Primer | For high- and variable-suction substrates: Sopro GD 749 primer and Sopro SG 602 primer-sealer For non-absorbent substrates: Sopro HPS 673 bonding primer For calcium sulphate screeds: Sopro MGR 637 multi-purpose primer (for all sizes), SoproGD 749 primer (sizes up to 0.2 m²), Sopro SG 602 primer-sealer (sizes up to 1.0 m²) For stabilising friable mineral substrates and as an adhesion promoter on smooth substrates:Sopro EPG 1522 epoxy primer For further information, please consult the relevant technical data sheets. |
| Specified Times | Apply for normal temperature range of +23°C and 50% relative humidity; higher temperatures shorten and lower temperatures lengthen these times |
| Application Temperature | Between +5°C and max. +25°C air and substrate |
| Tools/ Tool Cleaning | Mixing attachment, notched trowel with suitable serration (tooth size up to 12 mm); wash tools with water immediately after use. |
| Packaging | 25kg bag |
Available in 25kg bags with 40 bags per pallet.
For other adhesives from SMET. SMET has a wide range of Professional Tiling systems, including, Rapid-set Tile adhesives, High-Strength adhesive, Flexible Adhesive, and Large-Format adhesives, primers, and multi-purpose primers, sealers, and tools available for your tiling needs.
