ACCLIMATION AND SITE CONDITIONS
- Acclimate adhesive and flooring to room temperature at the jobsite 72 hours before installation. Building climate control system must be functioning with a temperature of 18ºC - 27ºC and maximum relative humidity of 70% for 72 hours before flooring is installed, during installation, and for 72 hours after installation.
- Moisture testing: For concrete slabs, conduct moisture testing per ASTM test methods F1869 Test for Measuring Moisture Vapor Emission Rate (MVER) of Concrete Subfloor Using Anhydrous Calcium Chloride and/or F2170 Test Method for Determining Relative Humidity in Concrete Floor Slabs Using in Situ Probes. Contact ASTM International to obtain copies of the test methods before proceeding. MVER using ASTM F1869 (Calcium chloride test) must not exceed 15 lbs/24 hours/1000 square feet. Relative Humidity using ASTM F2170 (RH Probe test) must not exceed 85%. If readings exceed these limits, DO NOT USE BONA R850T. For wood substrates, follow flooring manufacturer’s guidelines including moisture content and required moisture measuring methods.
SUBSTRATE PREPARATION
- Substrate must be clean, smooth, dry, free of loose material and structurally sound, with the surface slightly textured for best adhesion (similar to a light broom finished concrete).
- Remove adhesive residue, paint, concrete curing compounds or other contaminants that may affect adhesive bond.
- Surface cracks, grooves, depressions, control joints or other non-moving joints, and other irregularities must be filled or smoothed with a Portland Cement based patching and levelling compound.
- Substrate must be level to 3/16” in a 10-foot span.
- Do not install wood flooring before the compound has fully cured.
- Do not install over expansion joints or other moving joints in a concrete slab.
- Slab temperatures must be between 13º and 35ºC.
- Suitable substrates include concrete, plywood, particle or chip board, stone, ceramic, terrazzo, Warmboard®, radiant heat flooring (refer to manufacturer’s recommended installation instructions) and dry above-grade gypsum underlayment, recycled rubber underlayment.
PRODUCT LIMITATIONS
Bona R850T will not prevent moisture-related damages to wood flooring originating from the top, sides or ends of flooring (water leaks, puddles, hydrostatic head, etc.) nor does it eliminate other moisture or installation related issues such as improper acclimation of flooring or the effects of jobsite temperature and humidity.
DO NOT USE BONA R850T
- On wet, contaminated or friable surfaces
- Over concrete curing compounds, sealers or other surface treatments that could affect adhesion
- On areas subject to hydrostatic head
- On cutback residue, or over vinyl/VCT
- On chemically treated woods (stain, preservatives, etc.)
- As a leveling compound
APPLICATION
- Remove end cap of applicator gun and pull back piston.
- Insert R850T tube into applicator gun, snip the exposed end of the R850T tube.
- Replace end cap – make sure to use the supplied applicator cone.
- Apply by pulling applicator gun trigger.
- Apply adhesive along the entire length of the board for best results.
CLEAN-UP
Clean adhesive from the surface of the floor immediately, while wet. Use mineral spirits on a clean white cloth.
STORAGE
Store in a climate controlled environment. Keep from freezing. Do not store for extended periods in excess of 32º C.
