Bostik Bostik BEST

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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.

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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))

Best Practices for Bostik Bostik BEST

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Technical Data for Bostik Bostik BEST

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Overview

Application Type
- Adhesive - Bond
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
- Acrylic
- VOC - 20 g/L
- Polyurethane - Urethane
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

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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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Spec Engine^® Results
- Bondmaster 4L75(Henkel)
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- 3401(Dymax)
  UV/Visible Light Cure; Blue Fluorescing for Easy in-line inspection; Moisture and Thermal Resistance.
- Loctite Stycast PC 40-UMF(Henkel)
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Closest Results from this Manufacturer
- EFA Engineered Flooring Adhesive(Bostik)
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