Adhesive Systems - Fastening - For Professional Use Only
Bona R850T is a one-component, moisture curing, water and solvent free, silane-based adhesive for wood floors. Bona R850T provides outstanding adhesion to a variety of surfaces, and allows for the natural movement of wood flooring. Bona R850T, is a high viscosity adhesive, based on Bona R850, made for gun application. Rapid setting, the hardened adhesive has a firm texture and can be used on nearly all sub floors.
- Perfect alternative to face nailing close-out rows, board replacements and trim applications.
- Excellent initial “green grab” means the flooring stays in place.
- Rapid shear strength development – Flooring is ready for furniture and foot traffic in one day.
- Easy to clean – Will not harm the finish on pre-finished trim and floors; will not stain hands.
- Easy to apply – Clean, No Waste, Ergonomical design.
- Exceptional ridge stability provides maximum adhesive transfer.
- GREENGUARD Indoor Air Quality Certified®.
- Very low VOC – Meets the criteria for LEED EQc 4.1 (v. 2.1, 2.2, 3.0).
- California Proposition 65 Compliant.
- Can be used with radient heat systems.
- Ideal for all glue assist installations
HOW TO USE IT
Application: Remove end cap of applicator gun and pull back piston. • Insert R850T tube into applicator gun, cut the exposed end of the R850T tube. • Replace end cap – make sure to use the supplied applicator nozzle. • Apply by pulling applicator gun trigger. • Apply adhesive in a “s” pattern for best results.
Replaces top nailing on close-out rows and board replacements. Supplemental fastening for wide plank boards when nailing and gluing are needed. Idea for projects where traditional fastening isn’t practical – hard to reach areas, radiant heat floor.
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 55º and 95ºF. Suitable substrates include concrete, plywood, particle or chip board, stone, ceramic, terrazzo, radiant heat flooring (refer to manufacturer’s recommended installation instructions) and dry above-grade gypsum underlayments.
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 65ºF - 80ºF and maximum relative humidity of 70% for 72 hours before flooring is installed, during installation, and for 72 hours after installation.
Do not use: 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 As an adhesive.
Clean Up: Clean adhesive from the surface of the floor immediately, while wet. Preferably clean with a detergent. Avoid using solvents.
Storage temperature: The temperature must not fall below +5ºC or exceed +25ºC during storage or transportation. Store in cool, dry, well ventilated area.
Nota: 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
Caution: Store in accordance with local regulations. Notes on joint storage Keep away from: oxidizing agents, strong alkalis, strong acids. Additional information on storage conditions Observe label precautions. Store in a dry, cool and well-ventilated area. Keep away from heat and direct sunlight. Keep container tightly closed. No smoking. Prevent unauthorized access. Containers that have been opened must be carefully resealed and kept upright to prevent leakage.
|PRODUCT SIZES:||20 oz.||SUBSTRATES:||All flooring including wide planks, stair treads and risers.|
|SHEER STRENGTH:||335 psi (at final cure; lap sheer test, 1 mm gap)||ELONGATION:||250%|
|MOISTURE LEVELS:||Moisture protection up to 15lbs or 85% RH.||FULL CURE:||Light foot traffic: 8-10 hours. Furniture, fixtures: 12-24 hours. Unfinished floor sanding after 24 hours.|
|PRODUCT FORM:||Viscous Liquid.||PROJECTS:||Commercial. Residential.|
|COVERAGE:||600 ml per tube.||BASED:||Silane Modified-Prepolymer.|
|USE ONLY:||Bona R850T Applicator Gun.||CATEGORY:||Adhesive.|
|VOC:||Negligible||OPEN TIME:||40 minutes.|
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