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Technical Data Sheet (TDS)

QFP-520 Quick Floor Patch

Trowelable Patching Compound

Special features

  • Patches up to 1/2" thick
  • Very easy to spread
  • Can be used under any flooring

Product Description
Fast setting concrete mix for filling holes and building ramps over any sound subfloor. Easy to spread, set up very quickly, suitable under wood flooring, ceramic tiles, and resilient floorings.
Pre-Installation Checklist
A successful installation requires proper preparation of the subfloor. Read and understand all applicable guidelines and technical data sheets before installation. Follow industry standards and flooring manufacturers' recommendations for subfloor moisture content, design, layout, and application of flooring materials. All flooring material's backing must be solid, sound, and free of anti-adherents. All slab constructions must meet the specific requirements of the floor covering to be installed.
Sub Floor Examination
Prior to installation, the subfloor must be checked according to applicable installation guidelines. It must be solid and sound, permanently dry, clean, free of chaps and anti-adherents, and resistant to pressure and tension. The moisture content of all floors must be measured before installation.
Sub Floor Preparation
The condition of the subfloor will determine which type of mechanical treatment is required (e.g. wire brushing, sanding, grinding, or shot blasting). Dust, paint, curing compounds, sealers, residual adhesives, or other surface contaminants MUST be removed and a porous surface achieved by suitable means. The extent of subfloor preparation can only be determined at the site by the installer. Clean the surface with an industrial vacuum cleaner and tack the floor with a damp microfiber mop before application. Do not use sweeping compounds unless they are water-based as most others will contain oil or wax which will act as an anti-adherent and prevent primers, sealers, leveling compounds, coatings, and/or adhesives from bonding to the concrete. Cracks and gaps must be treated prior to application of primers, sealers, leveling compounds, coatings, and/or adhesives (for details see Technical Information #19 @ www.staufusa.com).
Apply suitable primer or sealer to the subfloor before spreading cement or gypsum-based leveling compounds to increase the bond.
Mixing of Components
Fill the correct amount of cold water into a bucket. Wear a proper dust mask when using powdered products in enclosed areas. While stirring add powder to the water and continue stirring until an even mixture is formed. Use an electric mixer with 600 to 800 rpm. Stir for two more minutes, wait one minute and stir again for one minute.
Installation Procedure
Spread the floor patch within approx. 15 min. and protect it from direct sunlight and draft during drying.
Limitations
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.
In case of an accident, injury, spill, or exposure, see SDS for information. Consult the Technical Data Sheet at www.staufusa.com 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 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 @ www.staufusa.com
General Features
  • LEED qualified
  • Contains no solvents
  • Contains no VOC (calc. per CA Rule 1168)
  • Nonflammable
  • Ozone friendly
  • Freeze/thaw stable
  • Works under any STAUF adhesive
Installation Features
  • Creates dust free surface
  • Eliminates hollow spots
  • Very low odor
  • Cleans with warm water and soap
  • Spreads easily
  • Dries quickly
  • Higher temp will shorten drying time
  • Observe pot life during installation
Long Term Features
  • Resistant against aging
  • Suitable for radiant heat systems with primer
Approved Subfloors
  • Concrete Slabs
  • OSB (underlayment grade)
  • Plywood (underlayment grade)
  • Felt backed Sheet Vinyl (well bonded, sanded, asbestos-free)
  • Ceramic Tiles
  • Stone, Terrazzo
  • Radiant Heated Subfloors
Approved Primers
  • STAUF AQP-200 Eco-Prime
Approved Sealers
  • STAUF ACS-210 True-Seal
Spread Rate
  • 1/32 in thick: up to 140 SF/unit
Curing Time before Flooring Installation
  • Approx. 4 hours
Temperature Range during Installation
  • 50-90F (10-32C)
Relative Humidity Range during Installation
  • 30% - 80%
Packaging Size
  • 4 count Case
  • 25 lbs. Paper Bag
  • 100 per pallet
Color
  • Grey
Mixing ratio
  • 4 quarts cold water per bag
Storage
  • Dry
Shelf Life
  • 6 Months in original, unopened container
Thickness
  • up to 1/2 in, more in small areas
Pot Life
  • Approx. 20 min. @ 70F (21C)
Compression Strength [psi]
  • 5000
Revision: 2022-04-18 14:08:28

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