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Application Guidelines |
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Subfloor Preparation
All substrates must be clean, dry, structurally sound, properly cured and free of dirt, oil, paint, old adhesive, wax, sealers and curing agents. General scouring with 20 grit or #3 1/2 paper will remove most compounds. All loose materials must be vacuumed from the surface after scouring. The subfloor must be flat to a tolerance of 3/16" in a 10’ radius. Hollow spots, popping spots and squeaks are related to unevenness in the subfloor. Grinding concrete floors is preferred over the use of filling compounds.* If some filling/leveling compounds are used, they must be Portland Cement based and have a compressive strength equal to or greater that 3000 psi when cured. Use of Titebond 821 Premium over light weight concrete and all gypsum based materials requires the use of Titebond Concrete Primer or equivalent prior to application of adhesive.
For further information on Titebond Concrete Primer, contact Franklin Technical Service at 1-800-347-4583.
Remove all existing base, shoe molding and door thresholds prior to continuing the installation. All door casings must be undercut with either a jamb saw or a hand saw. Use a piece of the flooring as a guide to determine the thickness needed.
Subfloor Moisture Check
Titebond 821 Advantage may be used for above-, on- and below-grade applications and on all common substrates. All applications are susceptible to moisture and should be tested for moisture prior to installation in several locations within the installation area.
Acceptable conditions for above-, on- and below-grade applications are: | | Less than 3 lbs./1000 sq.ft./24 hours on a Calcium Chloride Test | | Less than a reading of 4.5 on a Tramex Concrete Moisture Encounter | | Wood substrates must have a moisture reading of less than 13% when using a Tramex or Delmhorst or equivalent moisture meter |
If subfloor moisture conditions do not meet above guidelines at the time of flooring installation or they could exceed them at any time after installation then a Titebond Moisture Control system should be used.For more information concerning these products and moisture conditions, call Technical Service at 1-800-347-4583.
Gluing Plywood Over Concrete
Use 3/4" exterior-grade plywood, cut into
4' x 4' sections. Score plywood backside 3/8" deep every
8"-10" in order to relieve tension in plywood
(There should be 4-6 cuts in all 4' x 4' sheets). Use a 1/4" x 1/4" square-notched trowel to apply adhesive to concrete. Set 4' x 4' sheets into wet adhesive. Add weight as necessary to ensure adhesive remains in contact with plywood as it cures. Allow adhesive to cure overnight before proceeding with flooring installation.
Installation Recommendations
Floor Type - Parquet and Engineered |
Trowel Size |
Coverage |
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| All parquets measuring less than 3/4" thick |
1/8" x 1/8" x 1/8"
Square-notch |
Approx. 65 sq.ft./gallon |
| All engineered flooring |
3/16" x 1/4" x 1/2"c-c
V-notch |
Approx. 50 sq.ft./gallon |
Floor Type - Solid |
Trowel Size |
Coverage |
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Solid flooring with a width of 3" or less
and measuring 1/2" or less in thickness |
3/16" x 1/4" x 1/2"c-c
V-notch |
Approx. 50 sq.ft./gallon |
Solid flooring with a width greater
than 3" and measuring 1/2" or less in
thickness & bamboo |
3/16" x 3/16" x 3/16"
Square-notch |
Approx. 35 sq.ft./gallon |
CLEAN TROWEL OFTEN TO PREVENT ADHESIVE BUILD-UP.
Installation of Wood Flooring
Titebond 821 Premium can be installed using the "wet lay" or "flashed" methods, depending on your preference and the environment of your installation. The following definitions will help you decide which method is best for you.
- Wet Lay MethodIn the "wet lay" method you do not flash the adhesive; you begin laying the wood flooring immediately after troweling the adhesive. While using the wet lay method, you cannot work on top of the flooring that was just installed. Working in small sections is helpful for this method as it will allow you to reach across the adhesive to install the wood flooring without putting any weight on it.
- Flashed MethodThe "flashed"** method is when the adhesive is allowed to flash for the recommended amount of time prior to installing the wood flooring. While using this method, you are advised to trowel out larger sections of the room so that you spend most of your time laying wood rather than flashing adhesive. Be careful not to exceed Titebond 821 Premium’s open time of 90 minutes and do not trowel more adhesive than you can comfortably cover with the flooring in 90 minutes.
Re-sealing and Re-opening Partial Pail
Scrape sides of pail (this will aid in removal of adhesive later). Place plastic trash bag over unused adhesive, working out any air pockets. Replace lid on pail and tightly seal. Upon re-opening pail, remove trash bag. Material should be ready for use.
Cleanup
As the pre-finished flooring is being installed, immediately wipe any wet adhesive from the flooring, tools and equipment with mineral spirits. Do not allow adhesive to cure on surface of the flooring, tools or equipment. Follow solvent manufacturer’s directions when working with solvents. Cured adhesive will be difficult to remove. For specific cleaning instructions, call Franklin Technical Service at 1-800-347-4583.
*CAUTION: Do not sand, scour or abrade any material that is suspected of containing asbestos fibers. Asbestos is known to cause cancer. Federal law requires that asbestos be handled by a licensed and certified hazardous materials contractor
* *The recommended flash time for Titebond 821 Premium Urethane Wood Flooring Adhesive is 30 minutes, depending upon subfloor moisture and humidity. Specific questions regarding "flash time" should be directed to Franklin Technical Service at 1-800-347-4583.
Warranty
Please read Knowledge Base article 100525 for warranty information.
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Product Features |
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Non-slump formula
Superior green grab
Long open time
VOC-compliant
Easy cleanup
Highly moisture-resistant
Will not cause dimensional changes in wood flooring
Excellent bond strength
Mold and mildew resistant
No flash time required
Ideal for above-, on- and below-grade installations
Unaffected by freezing temperatures
95% solids
Contains no water
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Limitations |
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Do not install solid wood below-grade
Do not allow adhesive to cure on wood flooring surface
Do not allow foot traffic for 8 hours after installation
Do not use as a leveler
Installations in dry or cool environments or over dry subfloors will take longer to cure |
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Caution Statement |
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WARNING: EYE AND SKIN IRRITANT. POTENTIAL SKIN AND RESPIRATORY SENSITIZER. Contains mineral spirits and residual isocyanates. Individuals with preexisting respiratory conditions should avoid exposure to vapors from uncured product. Prolonged or repeated skin exposure may cause skin irritation and sensitization or allergic reaction. Do not swallow or allow eye contact. First Aid: If skin contact occurs, wash affected area with soap and flowing water. If irritation persists or allergic reactions develop, seek medical attention. If adverse respiratory effects occur, remove individual to fresh air and seek medical attention. If eye contact occurs flush with water for 15 minutes, seek medical attention. If swallowed, do not induce vomiting, seek medical attention. For additional information, refer to Material Safety Data Sheet. KEEP OUT OF THE REACH OF CHILDREN. |
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Ordering Information |
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| Cat. No. |
Size |
Units per
Package |
Weight |
Packages
per Pallet |
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| 8129 |
3.5 Gallon Metal Pail |
1 |
45 |
36 |
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Important Notice: Our recommendations, if any, for
the use of this product are based on tests believed to be reliable. Since the use of this product is beyond
the control of the manufacturer, no guarantee or warranty, expressed or implied, is made as to such use or
effects incidental to such use, handling or possession or the results to be obtained, whether in accordance
with the directions or claimed so to be. The manufacturer expressly disclaims responsibility therefore.
Furthermore, nothing contained herein shall be construed as a recommendation to use any product in conflict
with existing laws and/or patents covering any material or use. |
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©1999 Franklin International