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Subfloor Preparation

Products

ARDEX K 40™ RAPID

Rapid, High Flow Self-Leveling Underlayment

  • Use to level and smooth interior concrete, terrazzo, ceramic and quarry tile, epoxy coating systems and non-water-soluble adhesive residue on concrete
  • Rapid dry technology – Install most flooring in as little as 2 hours*
  • Levels from 1/8” (3 mm) up to 1” (24 mm) thick
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Information ARDEX K 40™ RAPID

*All data based on recommended application instructions at 70°F (21°C).

Suitable Substrates

  • Concrete (structurally sound)
  • Terrazzo on concrete†
  • Approved non-porous materials on concrete†
    • Epoxy terrazzo; non-porous (non-absorbent) cementitious terrazzo
    • Ceramic, quarry or porcelain tiles
    • ARDEX MC™ RAPID and other epoxy coatings
    • ARDEX PU 50™ and ARDEX VR 98™
    • Non-water-soluble adhesive residue
  • Concrete treated with certain curing compounds (test areas only; see ardexamericas.com/properprep for instructions)

† Must be sound, solid and well-bonded to underlying, structurally sound concrete substrates.

Key Features

  • Use to level and smooth interior concrete, terrazzo, ceramic and quarry tile, epoxy coating systems and non-water-soluble adhesive residue on concrete
  • Rapid dry technology – Install most flooring in as little as 2 hours
  • Levels from 1/8” (3 mm) up to 1” (24 mm) thick
  • Interior use only

Standards

SystemOne™

Technical Data ARDEX K 40™ RAPID

Installation

Mixing and Application:
Water ratio: 6 -6.5 quarts (5.68 – 6.15 L) of clean water per bag
Faster dry time: 6 quarts (5.68 L); Highest flow: 6.5 quarts (6.15 L)

Performance

Coverage: 56 ft² (5.2 m²) at 1/8” (3 mm); Coverage varies with texture of substrate surface.
Max. Thickness: Up to 1” (24 mm); see the “Thickness of Application” Section in Technical Data on Downloads tab.
Flow Time: 10 minutes
Compressive Strength (ASTM C109/mod – Air cure only): 8,000 psi (562 kg/cm²) at 28 days
Flexural Strength (ASTM C348): 2,000 psi (140.6 kg/cm²) at 28 days
Drying Time: See the “Drying Time and Installation of Flooring” section in Technical Data on Downloads tab.
Walkable: 60 to 90 minutes
VOC: 0
Packaging: 50 lbs (22.7 kg) bag
Storage: Store in a cool, dry area. Do not leave bags exposed to the sun.
Shelf Life: 9 months, if unopened and properly stored.
Warranty: ARDEX L.P. Standard Limited Warranty applies. Also eligible for the ARDEX/HENRY SystemOne™ Warranty when used in conjunction with select HENRY® Flooring Adhesives. See www.ardexamericas.com/services/warranties for full warranty details.

For complete product technical information, click on the Downloads tab and open the Technical Data download.

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Information ARDEX K 40™ RAPID

*All data based on recommended application instructions at 70°F (21°C).

Suitable Substrates

  • Concrete (structurally sound)
  • Terrazzo on concrete†
  • Approved non-porous materials on concrete†
    • Epoxy terrazzo; non-porous (non-absorbent) cementitious terrazzo
    • Ceramic, quarry or porcelain tiles
    • ARDEX MC™ RAPID and other epoxy coatings
    • ARDEX PU 50™ and ARDEX VR 98™
    • Non-water-soluble adhesive residue
  • Concrete treated with certain curing compounds (test areas only; see ardexamericas.com/properprep for instructions)

† Must be sound, solid and well-bonded to underlying, structurally sound concrete substrates.

Key Features

  • Use to level and smooth interior concrete, terrazzo, ceramic and quarry tile, epoxy coating systems and non-water-soluble adhesive residue on concrete
  • Rapid dry technology – Install most flooring in as little as 2 hours
  • Levels from 1/8” (3 mm) up to 1” (24 mm) thick
  • Interior use only

Standards

SystemOne™

Technical Data ARDEX K 40™ RAPID

Installation

Mixing and Application:
Water ratio: 6 -6.5 quarts (5.68 – 6.15 L) of clean water per bag
Faster dry time: 6 quarts (5.68 L); Highest flow: 6.5 quarts (6.15 L)

Performance

Coverage: 56 ft² (5.2 m²) at 1/8” (3 mm); Coverage varies with texture of substrate surface.
Max. Thickness: Up to 1” (24 mm); see the “Thickness of Application” Section in Technical Data on Downloads tab.
Flow Time: 10 minutes
Compressive Strength (ASTM C109/mod – Air cure only): 8,000 psi (562 kg/cm²) at 28 days
Flexural Strength (ASTM C348): 2,000 psi (140.6 kg/cm²) at 28 days
Drying Time: See the “Drying Time and Installation of Flooring” section in Technical Data on Downloads tab.
Walkable: 60 to 90 minutes
VOC: 0
Packaging: 50 lbs (22.7 kg) bag
Storage: Store in a cool, dry area. Do not leave bags exposed to the sun.
Shelf Life: 9 months, if unopened and properly stored.
Warranty: ARDEX L.P. Standard Limited Warranty applies. Also eligible for the ARDEX/HENRY SystemOne™ Warranty when used in conjunction with select HENRY® Flooring Adhesives. See www.ardexamericas.com/services/warranties for full warranty details.

For complete product technical information, click on the Downloads tab and open the Technical Data download.

Contact Us

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