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SCHÖNOX® RR Cement Based Rapid Setting Repair Mortar

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Product Name Price Qty
SCHÖNOX® RR Cement Based Rapid Setting Repair Mortar, 55 LBS
Item # EX-SCHRR-55
Mfr. Model # 55# SCHONOX RR
55 Lbs    Qty: 1
Availability: Typically in stock (Details)
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  • For professional use only
  • EMICODE EC 1PLUS R: very low emission
  • For interior use only
  • Fine-grained
  • Fast drying even in higher layer thickness
  • Coverage: Approx. 56 sq ft per unit at a thickness of 1/8"

Product Information

SCHÖNOX RR is a cement-based rapid-setting repair mortar suitable for use on all cement- and gypsum-based substrates. It is designed for rapid-drying patchment repairs in interior areas.


SCHÖNOX RR can be installed up to 2”. Users can layer thicknesses above 1/16” up to 3/8” without aggregates and up to 2” with aggregates.


This heavy-duty, fine-grained compound is extremely fast-drying, even in higher layer thicknesses. It produces a very smooth surface with high hardness and strength and low shrinkage.


SCHÖNOX RR is rated EMICODE® EC 1PLUS R for very low emissions. It is suitable for castor wheel loadings above 1/16“ according to DIN EN 12529.


SCHÖNOX RR is suitable for patching, filling, and leveling of:

  • Concrete, cement substrates
  • Gypsum substrates
  • Old substrates, such as ceramic tiles
  • Old water-resistant adhesive residues
  • Wooden substrates
  • Stair steps and wall breakouts


SCHÖNOX RR can also be used on underfloor heating systems.


Key Specifications:

  • Pot Life: Approx. 15 minutes
  • Ready for Foot Traffic: Approx. 30 minutes
  • Ready for Covering: Approx. 4 hours
  • Working Temperature: Not below 41°F
  • Environmental Product Declaration (EPD): EPD-DIV-2013311-EN
  • LEED—May help contribute to LEED certification of projects in the following categories:
    • EQc2: Low-Emitting Materials – 1 to 3 points
    • MR Credit 1.1: Building Reuse-Maintain – Existing Walls, Floors and Roof – up to 3 points
    • MR Credit 1.2: Building Reuse-Maintain – Existing Interior Nonstructural Elements – 1 point
  • VOC Content: 0g/l (calculated), SCAQMD 1113
  • Shelf Life: 12 months, unopened
  • Coverage: Approx. 56 sq ft per unit at a thickness of 1/8”
  • Compressive Strength (ASTM C109): 4,200 PSI / 25 N/mm2 at 28 days
  • Flexural Strength (ASTM C348): Approx. 1,100 PSI / 7 N/mm² after 28 days
  • Initial Set (ASTM C191): Approx. 20 minutes
  • Final Set (ASTM C191): Approx. 30 minutes
  • UL-classified in accordance with ASTM E84 (ANSI/UL 723): Flame Spread 0; Smoke Development 0

* All values are approximate, are subject to local climatic fluctuations based upon conditions at 70°F with atmosphere of less than 65% relative humidity following the recommended mixing ratio. Do not install underlayment or topping before the substrate has dried thoroughly.



Mixing Ratio:

Mix each 25 kg / 55 lb. bag with 5.5 liters / 5.8 quarts of water.


*If SCHÖNOX RR is extended with dry, clean aggregate (aggregate is added last) at a layer thickness of 3/8”–2”, type and amount of aggregate used will affect product performance. As qualities of locally available aggregates vary, we recommend performing tests prior to use on a larger scale. Do not overwater!


Recommended Working Method:

  1. Using a clean mixing bucket, add SCHÖNOX RR to cold, clean water to form a homogeneous mixture. Mix thoroughly for approx. 3 minutes using a heavy-duty drill (min. 600 RPM) is recommended to obtain a lump-free mix.
  2. Apply, smooth, and shape the leveling compound using a stainless steel smoother or a smoothing trowel.
  3. Do not mix more material than can be applied within 15 minutes.
  4. Protect curing SCHÖNOX RR layers from high ambient temperatures, direct sunlight, and draughts.
  5. Clean tools in water immediately


More Information
Brand Schönox
Category Concrete Patch
Condition New
Manufacturer Model Number T47 - Silica Aggregat
Safety Data Sheet (SDS)