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Technical Data Sheet (TDS)

RLC-580 Fiber Level

Fiber reinforced Hydrolyzed Anhydrite Self Leveling Compound

Special features

  • levels up to 3" thick by itself
  • forms flat and even surface by itself
  • can be used over any interior subfloor

Product Description
RLC 580 is a leveling compound based on Hydrolyzed Anhydrite formulated specifically for use over old adhesive or flooring remnants that still remain imbedded in the concrete after the old flooring has been removed. It is very forgiving of any foreign objects that are still intact and stuck to the floor and may be used directly over them.

It forms a flat, even, level surface and may be used to level up to 3? thick variances.
Pre-Installation Checklist
A successful installation requires proper preparation of the sub floor. Read and understand all applicable guidelines and technical data sheets before 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 installation, the sub floor must be checked according to applicable installation guidelines. It must be solid and sound, permanently dry, clean, free of chaps 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 below 75% RH using an in-situ probe per ASTM F1869 and F2170.

Sub Floor Preparation
The condition of the sub floor 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 pollutants MUST be removed by suitable means. Extent of sub floor preparation can only be determined at the site by the installer. Clean the surface with an industrial vacuum cleaner, tack or damp mop floor before application. Do not use sweeping compounds as most 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 @
Apply suitable primer or sealer to sub floor before spreading cement or gypsum based leveling compounds to increase bond.
Mixing of Components
Fill correct amount of clear cold water into bucket. Wear 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 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 leveling compound within approx. 20 min. Do not pour the compound in one spot but evenly over the entire (approx. 6 by 6 foot) area to be covered. The self-leveling compound does not need to be leveled mechanically and forms an even surface by itself. Protect the leveling compound from direct sunlight and draft during drying.
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 accident, injury, spill or exposure, see SDS 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, LLC. will in no event be liable for any incidental and/or consequential damages. herefore, 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
  • dries in less than 2 hours
  • 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
  • Eliminates hollow spots
Approved Sub Floors
  • Cutback Mastic (well bonded, not brittle, tested negative for asbestos)
  • Concrete Slabs
  • OSB (underlayment grade)
  • Plywood (underlayment grade)
  • Ceramic Tiles
  • Stone, Terrazzo
  • Radiant Heated Sub Floors
Approved Primers
  • STAUF AQP-200 Eco-Prime
  • STAUF CBP-240 Cutback Primer
Approved Sealers
  • STAUF ACS-210 True-Seal
Spread Rate
  • 1/4" thick: up to 25 SF/unit
Curing Time before Flooring Installation
  • approx. 48 hours
Temperature Range during Installation
  • 50-90F
Relative Humidity Range during Installation
  • 30% - 80%
Packaging Size
  • 50 lbs. Paper Bag
  • Grey
Mixing ratio
  • 6-1/4 quarts cold water per bag
  • dry
Shelf Life
  • 6 Months in original, unopened container
  • 1/4" to 3"
Pot Life
  • approx. 20 min @ 70F (21C)
Compression Strength [psi]
  • 5000
Revision: 2016-06-08 13:08:31

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