SCHÖNOX® US Cement Based Self‑leveling Compound

SCHÖNOX US is a cement-based self-leveling compound designed for use on cement- and gypsum-based substrates. This compound is designed for fast leveling in interior and exterior areas. It can be installed above 1/8” up to 3”.

SCHÖNOX US is water- and frost-resistant and may be used on both interior and exterior surfaces. It has no moisture vapor emission limitations on properly prepared concrete.

This low-shrinkage, pumpable compound is easy to apply. Users can layer thicknesses above 1/8“ up to 1.5“ without aggregates or layer thicknesses up to 3“ with aggregates.

SCHÖNOX ZM exceeds minimum Ff/Fl requirements of ASTM and ACI when installed in accordance with the guidelines. It has been tested in accordance with ASTM C1708.

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

SCHÖNOX US is suitable for use on:

• Concrete, cement substrates
• Rapid-drying cement screed systems
• Gypsum substrates
• OSB board, plywood (well screwed or bonded) prior to installing flexible coverings
• Old substrates, such as ceramic tiles and terrazzo
• Old, water-resistant adhesive residues

SCHÖNOX US is suitable for filling, smoothing and leveling of substrates under:

• Flexible coverings
• Wood floors, layer-thickness above 1/4” (interior only)
• Ceramic tiles
• Underfloor heating systems

SCHÖNOX US can also be used for filling, smoothing, and leveling of unheated, cement-based substrates under SCHÖNOX Moisture Mitigation Systems.

Key Specifications:

• Pot Life: Approx. 40 minutes at 68°F
• Ready for Foot Traffic: Approx. 4 hours
• Ready for Covering:
  • For floor covering products: After approx. 24 hours up to 1/4" thickness, after 48 hours up to 3/8” thickness
  • For tile or stone: after 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. 55–65 sq ft per unit at a thickness of 1/8” (depending on substrate conditions and aggregate used)
• Compressive Strength (ASTM C109):
  • 4,250 PSI / 25 N/mm² / 300 kg/cm² after 28 days
  • 2,000 PSI / 12 N/mm² / 135 kg/cm² after 1 day
• Flexural Strength (ASTM C348): Approx. 1,000 PSI / 6 N/mm² after 28 days
• Tensile Strength (ASTM C1583) at 1/8”: Above 350 PSI / 2 N/mm² after 3 days
• Initial Set (ASTM C191): Approx. 80 minutes
• Final Set (ASTM C191): Approx. 95 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