Bostik Bostik BEST

Bostik Bostik BEST Datasheet
  • Description for Bostik Bostik BEST

    An easy-to-trowel urethane adhesive and moisture control membrane. Its superior properties provide a tough, flexible, tenacious bond to a variety of surfaces.

    *See Terms of Use Below

    Application Type Bond
    1 Part or 2 Part 1 Part
    Material Form Liquid
    Substrate Ceramic tile, Well-Bonded Vinyl, Cement backer board, Chip Board, Concrete, Terrazzo, Particle Board, Cement Patch/Underlayment, PlyWood, Stone Inlays, Wood, OSB, Solid Hardwood, Engineered Hardwood, Bamboo, Cork, Parquet
    Manufacturer Bostik
    Chemistry Urethane, Acrylic
    Application Method Notched trowel
    Cure Method Moisture
    Odor Details Mild
    Cure Time (min) 480 to 600, 360 to 480, 480 to 720
    Viscosity (cPs) 220,000
    Color White, Eggshell, Tan
    High Temperature Resistance (°C) 66
    Low Temperature Resistance (°C) -40
    Density (g/cm³) 12.66 (weight (lbs/gal))
  • Technical Data for Bostik Bostik BEST

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 1 Part
    • Material Form
      • Liquid
    • Substrate
      • Ceramic - Ceramic tile
      • Concrete
      • Vinyl - Well-Bonded Vinyl
      • Wood - Chip Board, Particle Board, PlyWood, OSB, Solid Hardwood, Engineered Hardwood, Bamboo, Cork, Parquet
      • Stone - Cement backer board, Terrazzo, Cement Patch/Underlayment, Stone Inlays
      • Other - Gypsum Underlayments, Marble
    • Industry
      • Construction - Wood Floors, Hospital, Offices, Heavy Commercial, Offices/Light Commercial, Residential
    • Chemistry
    • Application Method
      • Spatula/Trowel - Notched trowel
    • Cure Method
      • Moisture / Condensation Cure - Moisture
    • Color
      • Brown - Tan
      • White
      • Other - Eggshell
    Specifications
    Cure Specs
    Application Temperature (°F) 50 to 100
    Odor Details Mild
    Cure Time (min) 480 to 600, 360 to 480, 480 to 720 Test Method
    Open Time Temperature (°C) 16, 16, 16, 21, 21, 21, 27, 27, 27
    Viscosity (cPs) 220,000
    Work / Pot Time (min) 180
    Open Time (min) 210, 210, 180, 180, 180, 150, 180, 150, 120
    Bond Strength
    Shear Strength (psi) >180 Test Method
    Tensile Strength (psi) >175
    Material Resistance
    High Temperature Resistance (°C) 66 Test Method
    Low Temperature Resistance (°C) -40 Test Method
    Hardness
    Elongation (%) >100, >150 Test Method
    Other Properties
    Flash Point (°F) 142.0 Test Method
    % Solids (%) >95
    Density (g/cm³) 12.66 (weight (lbs/gal))
    Business Information
    Shelf Life Details Store at temperatures between 50°F and 100°F. Shelf life is one year from date of manufacturing in closed,original packaging.
    Shelf Life Temperature (°F) 50 to 100
    Shelf Life Type From date of manufacture
    Shelf Life (mon) 12
    Not Good For
    Don't Use With VCT, Vinyl
  • Best Practices for Bostik Bostik BEST

    *See Terms of Use Below

    1. Surface Preparation

      Surfaces must be absorptive, clean, and free from loose materials, oil, grease, sealers, curing compounds, waxes, silicates, laitance, and all other surface contaminants that may inhibit proper bond. Completely remove cutback adhesive residue or other surface contaminants by diamond grinding, shot blasting, or scarifying to open the pores of the concrete. All surfaces to be treated must have a concrete surface profile (CSP) of 1-3 (similar to a broomed finish), as defined by ICRI (International Concrete Repair Institute, Guideline No. 03732). Maximum acceptable floor variation is 3/16" in 10 feet. Areas requiring patching or leveling must be done using a Portland cement-based material (e.g., Bostik Webcrete® 95, Webcrete® 98, SL-Rapid™, SL-100™, SL-150™, SL-175™, SL-200™ or UltraFinish™ Pro). Seal any cracks larger than 1/8" or expansion joints with Bostik 915FS™ or 955-SL™.

      PLEASE NOTE: Concrete substrate should NOT be smooth and reflective

      it must have a concrete surface profile of CSP 1-3 (similar to a broomed finish), as defined by ICRI (International Concrete Repair Institute, Guideline No. 03732). It also must be tested in accordance with ASTM F3191 and be found porous, where a 1/4" drop of water must absorb into the concrete within 1 minute.

    2. Curing

      Humidity affects cure to a greater degree than temperature

      the higher the humidity, the faster the cure. Under normal conditions, light foot traffic is acceptable after 8 to 10 hours

      normal traffic after 24 hours.

    3. Clean-Up

      As you work, immediately clean any adhesive from prefinished flooring with Bostik Ultimate™ Adhesive Remover or mineral spirits (be careful not to harm finish), then dry buff with a nonabrasive towel. Immediately clean all tools and equipment with Bostik’s Ultimate™ Adhesive Remover or mineral spirits before material cures.

      TROWEL CLEAN-UP TIP: Before use, cover areas of the trowel that are not used to spread the adhesive with blue tape. After use, simply tear off tape before material cures, and clean the remainder of the trowel with adhesive remover.

  • Comparable Materials for Bostik Bostik BEST

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Cure Time Test Methods
Cure Time Test Method
480 to 600 min
360 to 480 min Light foot traffic
480 to 720 min Normal foot traffic
Shear Strength Test Methods
Shear Strength Substrate
>180 psi Oak to concrete
High Temperature Resistance Test Methods
High Temperature Resistance Test Method
66°C Service Temperature
Low Temperature Resistance Test Methods
Low Temperature Resistance Test Method
-40°C Service Temperature
Elongation Test Methods
Elongation Test Method
>100 %
>150 % Cured
Flash Point Test Methods
Flash Point Test Method
61.1°C Closed cup