Refer to the flooring manufacturer’s specific recommendations for suitable substrates. Porous: Concrete, well-bonded cementitious underlayments, APA grade underlayment plywood (untreated) and radiant-heated subfloors where temperatures do not exceed 85°F (29.4°C) on all grade levels. Also can be used over well-bonded, properly primed gypsum underlayments (above-grade only). Non-porous: Ceramic tile, terrazzo, marble, certain epoxy coatings and existing well-bonded resilient flooring (not perimeter bonded or cushion-backed). Please note that all substrates must be sound, solid and well-bonded.
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 open-coat sandpaper 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. Grinding concrete floors is preferred over the use of filling compounds. If filling/flattening compounds are used, they must be Portland-based cementitious material and have a compressive strength equal to or greater than 3000 psi when cured. Moisture level in concrete subfloor will fluctuate. Any cementitious material used must be rated for the highest moisture content possible. Consult the cementitious material manufacturer’s application directions. Use of adhesive over lightweight concrete and all gypsum-based materials requires the use of an approved concrete primer prior to application of adhesive.
Floor Covering Recommendations
Vinyl composition tile (VCT), foam backed hardwood parquet.
Franklin 920 may be applied by roller, brush, trowel or airless adhesive gun. On smooth surfaces, use a 1/32" U-notch trowel at the rate of 250 square feet per gallon. On rougher surfaces, use a 1/16" square-notch trowel at the rate of 150 square feet per gallon. By roller, brush or spray, apply at the rate of 135 square feet per gallon on smooth surfaces and apply heavier on rough surfaces. Minimum open time is 20 minutes, or until adhesive becomes nearly clear and no longer transfers to the finger when lightly touched. Set tiles in place carefully because they will not slide. Roll within 12 hours with a heavy linoleum roller. Restrict heavy traffic for 24 hours.
Allow adhesive to dry well before exposing installation to cleaning. Use water to remove adhesive spots and clean tools.
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.