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Technical Data Sheet (TDS)

CBR-970 Renovator

For installation of Timber flooring over cutback mastic

Special features

  • no need to scrape or sand off old glue bonds permanently; won't dissolve cutback mastic no solvents / VOC / plasticizers / water / hazardous ingredients

Product Description
CBR-970 RENOVATOR is the first and only timber floor adhesive that is engineered to go directly over asphalt cutback adhesive without having to completely remove the old cutback mastic. It will not dissolve the cutback mastic as other types of adhesive do. It forms a permanent bond between the timber floor and the cutback mastic, greatly reducing the time, cost and sticky mess required to remove cutback mastic. It is recommended for solid or engineered timber flooring.

CBR-970 RENOVATOR meets or exceeds all current environmental and health codes and is certified 'Green' by an independent lab. It contains no water, solvents or VOCs. It spreads easily, cleans easily with Mineral Spirits, will not etch the finish of the flooring, and forms non-slumping ridges that help eliminate hollow spots caused by uneven sub floors. CBR-970 is not to be used over products containing asbestos.

CBR-970 RENOVATOR represents the latest in adhesive technology as well as providing a tremendous savings in time, labor and cost to Installers and Specifiers who need to install timber flooring over cutback mastic.
The adhesive spreads easily and has a non-slump formula that will help insure contact and adhesive transfer because the ridges will bridge normal gaps between the flooring and sub floor. It allows fast installation even with complicated patterns due to its strong green grab. There is no flash time required, so installation can commence immediately. Rolling is neither required nor recommended. It offers superior flexibility and is designed to keep the flooring in place, yet allow for normal movement during seasonal changes to the flooring.
Pre-Installation Checklist
A successful installation requires proper preparation of the sub floor. Read and understand all applicable guidelines and technical data sheets before beginning installation. Follow industry standards and flooring manufacturer's recommendations for sub floor moisture content, design, layout and application of flooring materials. All slab constructions must meet the specific requirements of the floor covering to be installed.
Sub Floor Examination
Prior to starting, the sub floor must be checked according to NWFA installation guidelines. It must be solid and sound, flat, permanently dry, clean, free of chaps, indentations and anti-adherents, as well as resistant to pressure and tension. Moisture content of all floors must be measured before installation.
Moisture content in concrete sub floors must be below 3#/24h/1,000 sq. ft. using the Calcium Chloride Test or less than 75% using the relative humidity test.

All timber floors should have 8-14% moisture content at installation. There should be no more than a 4-5% variance in moisture content between the timber flooring and any timber sub floor. See NWFA guidelines and the timber flooring manufacturer's recommendations for details.
Existing cutback mastic must be permanently bonded to the sub floor. The floor must be inspected and tested for asbestos. If asbestos is found, it must be properly removed or abated before continuing installation. This adhesive is not an asbestos abatement.
Sub Floor Preparation
Sub floor preparation of the existing cutback mastic requires only that the ridges or high spots be knocked off, typically with only 1-3 passes of a mechanical scraper. Brittle cutback mastic can be crushed and vacuumed up. Softer cutback need only be leveled.

If necessary, a leveling compound may be used before spreading the adhesive. The remainder of the cutback mastic can remain on the floor. No primer is required. Application over radiant heat is acceptable.
Installation Procedure
Spread the adhesive with the appropriate notched trowel. Avoid excessive adhesive thickness by passing the trowel evenly through the adhesive at a 45 degree angle. There is no flash time, so installation should begin immediately. Lay the flooring into the adhesive, correctly position it and press down firmly. Rolling is neither required nor recommended. Be sure to check the boards at regular intervals to make certain good adhesive transfer from floor to flooring is accomplished. Bowed boards or boards over low spots should be weighted down until the adhesive cures.
Place plastic on top of unused adhesive. Remove air pockets between adhesive and plastic. Place silica bags in pail. Place lid on pail and seal tightly. Store pail in a cool dry place.

When using other than STAUF products in conjunction with STAUF primers, sealers, leveling compounds, or adhesives, STAUF denies any and all responsibility for any ensuing problems and/or damages without prior written authorization from STAUF.
Do not install solid timber below grade. Do not use on concrete with curing agents or sealers except approved Sealers listed below. Do not use on damp sub floors. Do not install timber flooring with a moisture reading above 14%. Do not use adhesive as a leveling material.
This adhesive is mold and mildew resistant and waterproof when fully cured and will not dissolve if it gets wet. However, it will not prevent moisture-related damages to timber flooring unless it is used as a moisture barrier within the limitations set forth in the technical data sheet.
In case of accident, injury, spill or exposure, see MSDS sheet for information. Consult technical data sheet at for updated information.
The foregoing representations are based on the results of our most current product and material testing within a controlled environment and are of a non-obligatory advisory nature only. As such, they do not constitute an express or implied warranty of any kind including the Warranty of Merchantability and/or Fitness for a Particular Purpose. Because we have no control over the actual quality of workmanship, materials used and worksite conditions, STAUF USA Adhesive LLC, will in no event be liable for any incidental and/or consequential damages. Therefore, we strongly recommend that prior on-site testing be conducted to refer to and study the suitability of the product for the intended purpose. With the release of this technical information sheet all its prior versions become invalid. For warranty and warranty disclaimer information please see our Limited Lifetime Warranty @
General Features
  • LEED qualified
  • for installation over old cutback mastic
  • contains no isocyanates
  • contains no water
  • contains no solvents
  • contains no VOC
  • certified "green"
  • certified "very low emission"
  • nonflammable
  • high solids content
  • ozone friendly
  • strong and moisture curing like urethanes
  • Freeze/thaw stable
  • contains no plasticizers
Installation Features
  • wet lay - no flash time required
  • superior green grab
  • bridges normal sub floor variations
  • very low odour
  • cleans with acetone
  • no rolling required
  • no dimensional changes in timber flooring
  • high spread rate
  • long open time
  • spreads easily
  • higher temp & RH will shorten drying time
  • No risk of sensitization
Long Term Features
  • resistant against aging
  • remains elastic
  • suitable for radiant heat systems with primer
  • allows normal dimensional changes in timber flooring
  • adhesive is waterproof when cured
  • Eliminates hollow spots
  • No health hazards
Approved Timber Flooring
  • Engineered Timber Flooring
  • Strip Flooring (Solid Timber, <6 cm wide)
  • Shorts (Solid Timber, <6 cm wide, <1 m long)
  • Planks (Solid Timber, <18 cm wide)
  • Parquet
  • Solid Timber Flooring must be straight and flat
  • Bamboo Flooring (except Stranded Bamboo)
Approved Sub Floors
  • Cutback Mastic (well bonded, not brittle, tested negative for asbestos)
  • Concrete Slabs
  • OSB (underlayment grade)
  • plywood (underlayment grade)
  • Vinyl (well bonded, grinded, tested negative for asbestos)
  • ceramic tiles
  • stone, terrazzo
  • cured levelling compounds
  • radiant heated sub floors
  • Asphalt
Approved Primers
  • Primer is normally not required
  • STAUF AQP-200 Eco-Prime
Approved Sealers
  • Sealer is normally not required
  • STAUF ACS-210 True-Seal
  • STAUF ERP-270 Perma-Seal
Approved Leveling Compounds
  • Leveling is normally not required
  • STAUF QFF-560 Quick Feather Float
  • STAUF RLC-580 Fiber Level
Approved Trowels and Spread Rate
  • Trowel #5 (Engineered): up to 1.5 m/L
  • Trowel #4 (Solid): up to 1.2 m/L
  • Trowel #3 (Parquet Wood Floors): up to 1.72 m/L
  • Trowel #15 (Underlayments): up to 2.5 m/L
Cure Time until Normal Traffic
  • between 24 and 48 hours
  • Use acetone while wet
  • Use plastic scraper and terry cloth when dry
Temperature Range during Installation
  • 10-30 C
Relative Humidity Range during Installation
  • 30% - 80%
Packaging Size
  • 3 gal. (11.56 L) Plastic Pail
  • 48 per pallet
  • Beige
  • dry
Shelf Life
  • 12 Months in original, unopened container
Shear Strength
  • 218 psi (1.5 N/mm²)
Open Time30% R/H50% R/H80% R/H
50�F/10�C2 hours 1-1/2 hours 1 hour 
70�F/21�C1-1/2 hours 1 hour 45 mins 
90�F/32�C1 hour 45 mins 30 min 
Revision: 2013-10-03 21:11:23

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