Sopro’s No. 1 – 400 – Flexible Tile Adhesive

Sopro’s No. 1 Flexible Tile Adhesive is a Highly deformable, cementitious, highly polymer-modified, S1-grade flexible tile adhesive, meeting C2 TE S1 requirements to DIN EN 12004, for wall and floor installation of ceramic tiles, discoloration-resistant natural stone units and terracotta; also for underwater applications, e.g. in swimming pools and process water containers. Suitable for use in conjunction with wall and floor heating, waterproof membranes and for stoneware, fully vitrified stoneware and earthenware. Very high coverage and excellent workability. Also for tile-on-tile applications. With 4-in-1 formulation for thin-, floating- and medium-bed application, and for filling smaller areas with max. 20 mm coat thickness. SMET has a wide range of tile adhesives – check them out!

Coverage: Approx. 1.0 kg/m² per mm coat thickness

Suitable material: Earthenware, stoneware and fully vitrified stoneware tiles, mosaic, discoloration-resistant natural stone units, cast stone units, brick slips. Use: In residential, commercial and industrial facilities, bathrooms, catering kitchens, damp and wet spaces, swimming pools, on facades, balconies and patios. Suitable for filling and levelling smaller areas with max. 20 mm coat thickness (for drylining/dry construction and mastic asphalt screeds, max. 5 mm coat thickness).


Related Downloads

icon-pdf  TDS Sopro’s No. 1 Flexible Tile Adhesive

icon-pdf  EPD_ Sopro’s No. 1 _400_Flexible Tile Adhesive_Valid until 25.09.27

icon-pdf  TDS SMET_Tiling Onto Calcium Sulphate Floor Screed_System I

icon-pdf  SMET Professional Tiling Systems Brochure

Featured Benefits of Sopro’s No. 1 Flexible Tile Adhesive

  • For walls and floors, indoors and outdoors
  • C2: tensile adhesion strength ≥ 1.0 N/mm²
  • T: thixotropic – high sag resistance due to fibre reinforcement
  • E: extended open time > 30 minutes
  • S1: deformability ≥ 2.5 mm
  • 4-in-1 formulation: thin-bed, floating-bed and medium-bed laying; filler coats of up to 20 mm thickness
  • Excellent workability thanks to lightweight aggregate
  • Suitable for large-format units
  • Approved as system component for shipbuilding applications
  • System component of Sopro eScann® system
  • Low-chromate to Regulation (EC) No 1907/2006, Annex XVII
  • DGNB: Top quality level 4, Line 8, based on DGNB (German Sustainable Building Council) criterion “ENV1.2 Local Environmental Impact” (2015 version).
  • For healthy living: Recommended by Sentinel Haus Institut

Coverage: Approx. 1.0 kg/m²/mm

Technical Details Sopro’s No. 1 Flexible Tile Adhesive

Mixing Ratio see TDS above
Coverage Approx. 1.0 kg/m² per mm coat thickness
Maturing Time 3 – 5 minutes
Modification Sopro’s No.1 flexible tile adhesive (order no. 400) can be modified by Sopro MEG 1567 megaFlex dispersion. Addition of min. 25% dispersion allows achievement of S2 rating to DIN EN 12004.
Open Time Approx. 30 mins
Substrate preparation Substrate shall be clean, solid, strong, dimensionally stable and free from any adhesion-impairing substances. Cracks in screed: shall be filled with structurally bonding resin, e.g. Sopro SH 649 shaken resin. Irregularities: shall be levelled out, e.g. using Sopro RAM 3 454 renovation and levelling mortar, Sopro RS 462 repair filler, Sopro FS 15 550 plus floor-levelling compound, Sopro VS 582 self-levelling filler or Sopro SF 545 S-Flow universal floor-levelling compound. Cement screeds: shall be 28 days old and dry; otherwise use rapid-set products, e.g. Sopro Rapidur® B1, Sopro Rapidur® B3 and Sopro Rapidur® B5 rapid-set screed binders. Floating cement screeds or unbonded cement screeds on separating layer shall exhibit residual moisture ≤ 2.0% CM. Bonded cement screeds may be tiled as soon as they are walkable. When laying natural stone, risk of discoloration due to moisture penetration must be taken into account. Calcium sulphate screeds: (anhydrite and self-levelling anhydrite) screeds shall be adequately ground, vacuum-cleaned and primed, and shall exhibit moisture content ≤ 0.5% CM for unheated and ≤ 0.3% CM for heated constructions. Cement and calcium sulphate screeds incorporating heating elements shall be heated up to ensure adequate drying out prior to flooring installation. Gypsum plasterwork shall be dry, single-coat and shall not be felt-floated or smoothed. All relevant standards, guidelines and recommendations shall apply; workmanship shall comply with good practice.
Loadable After approx. 3 days; in commercial facilities after approx. 14 days, in areas subject to high wet exposure after approx. 7 days, for underwater applications after approx. 21 days, in conjunction with wall and floor heating after approx. 14 days
Specified Times Apply for normal temperature range of +23 °C and 50 % relative humidity; higher temperatures shorten and lower temperatures lengthen these times.
Tool cleaning Wash tools with water immediately after use
Tools Mixing attachment, notched trowel with suitable serration (tooth size up to 12 mm).
Underwater and permanently underwater area Suitable
Storage Approx. 12 months, subject to storage on a pallet in dry, protected conditions in original unopened containers.

Available in 25kg, 15 & 5 kg bags

For other SMET grouts, and adhesives from SMET.