Adhesive Systems - For Professional Use Only
Bona R851 adhesive is a one component, silane-based wood flooring adhesive that provides exceptional green grab strength. Its elastomeric characteristics allow the adhesive to move with the wood as it expands and contracts over the life of the floor.
- Excellent “green grab” means the flooring stays in place.
- No “memory” – Floor seams will not move apart.
- 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 floors; will not stain hands.
- Easy to apply – No arm fatigue.
- Exceptional ridge stability provides maximum adhesive transfer.
- GREENGUARD Indoor Air Quality Certified®.
- Moisture protection up to 15lbs or 85% RH.
- 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
HOW TO USE IT
Application: Use notched trowel (available from Bona) 100% COVERAGE/TRANSFER RATE IS REQUIRED FOR MOISTURE PROTECTION. To achieve 100% coverage rate, skim coat the floor utilizing the flat side of the Bona 1250G trowel to create a smooth surface free of voids. While skim coat is still wet, apply a second layer of Bona R851 with the Bona 1250G trowel using normal trowel on application.
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. Sandblasting, shot blasting or scarifying may be necessary to completely remove some of these residues. 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, cork, 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: 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. Acclimate Bona R851 adhesive to room temperature of the installation, usually overnight.
Trowel notch requirements: Parquet (12” x 12”) over smooth substrates; Acoustical Underllayment Pad – Bona 1000F Trowel: 5/32” x 5/32” x 5/32” V-notch / 80-85 sq. ft/gallon. • Engineered Flooring - up to 8” width; Solid Plank – maximum 3/4” thick and 5” width – Bona 1250G Trowel: 1/4” x 1/4” x 7/16” V-notch / 60-65 sq. ft/gallon. • Engineered Flooring - up to 16” in width ; Soild Plank - ¾’ thick up to 9” width – Bona 1500G Trowel: 5/16” x 5/16” x 7/16” V-notch / 50-55 sq. ft/gallon.
Moisture Testing: UTILIZING THE FLAT SIDE OF THE BONA® 1500G TROWEL, SKIM COAT R851 ONTO SUBFLOOR CREATING A SMOOTH SURFACE FREE OF VOIDS. WHILE THE SKIM COAT OF ADHESIVE IS STILL WET, APPLY R851 WITH THE 1500G TROWEL. When using a Tramex measuring device to identify moisture levels in cementitious based substrates, use the Tramex measuring device to find the highest reading in the area to be installed and then run the CM testing method where you have recorded the highest reading. As a general guideline for floors with no in-floor heating system, if the Tramex is below 4%, the Bona R580 will not be necessary and between 4% and 6%, Bona R580 will be required. However, the CM method must be used to make final determination of concrete moisture levels. For moisture protection, ensure that 100% coverage and transfer have been achieved. For moisture content and quality of substrates, the guidelines of the wood floor manufacturer must be observed. For wood substrates, follow flooring manufacturer’s guidelines including moisture content and required moisture measuring methods.
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.
Clean Up: Clean adhesive from the surface of the floor while wet. Use mineral spirits on a clean white cloth.
Storage temperature: Store in a climate controlled environment. Keep from freezing. Do not store for extended periods in excess of 90ºF.
Nota: Bona R851 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.
|PRODUCT SIZES:||3 GALLONS||SUBSTRATES:||All flooring including solids up to 9” wide.|
|SHEAR STRENGTH:||335psi (at final cure; lap shear test, 1mm gap).||ELONGATION:||250%|
|MOISTURE LEVELS:||Moisture protection up to 15lbs or 85% RH, 4% Tramex or 2.5% CM||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:||Up to 50 sq. ft./gallon. (See "Trowel Notch Requirements").||BASED:||Silane Modified-Prepolymer.|
|VOC:||Maximum content of 20.||OPEN TIME:||40 minutes.|
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Returns Policy: You may return new, unworn or unused products within thirty (30) days of delivery for a full refund of the cost of the goods, or an exchange if preferred.