ARDEX K 15 Premium Self-Leveling Underlayment for Smoothing Interior Concrete Floors, Fast-Setting, 55 lbs (25 kg) Bag

Product Features:

• High-performance cement-based self-leveling underlayment
• Ideal for smoothing and leveling interior concrete floors
• Pumpable, pourable, and fast-setting for quick installation
• Can be applied from featheredge up to 1.5" neat or 5" with aggregate
• Walkable in 2-3 hours; install flooring in as little as 16 hours
• Compatible with a wide range of floor coverings: tile, vinyl, LVT, VCT, carpet, engineered wood
• Suitable for commercial, residential, and industrial flooring applications
• No mechanical profiling needed on clean concrete surfaces
• Excellent compressive strength, adhesion, and crack resistance
• For use in hospitals, schools, retail, warehouses, and renovation projects
• Compatible with radiant heating and underfloor heating systems
• Interior use only – non-porous and moisture-resistant
• Available in 55 lbs (25 kg) bags

Product Description:

ARDEX K 15 Premium Self-Leveling Underlayment is a high-performance, Portland cement-based underlayment formulated for interior use over concrete and certain non-porous surfaces. This premium self-leveling compound delivers exceptional flow and long working time, making it ideal for fast-track commercial and residential flooring installations. Designed to level and smooth interior substrates prior to installing finished flooring, ARDEX K 15 provides a strong, flat, and durable surface that supports a wide variety of flooring options including ceramic tile, LVT, VCT, wood, carpet, and engineered hardwood. The fast-setting formulation allows foot traffic in 2-3 hours and floor covering installation in as little as 16 hours depending on thickness and jobsite conditions.

With its outstanding pumpability and extended pot life, ARDEX K 15 is perfect for large-scale renovations, industrial floors, hospitals, retail stores, and institutional settings. It can be applied from featheredge up to 1.5 inches neat, and up to 5 inches with aggregate. This moisture-resistant underlayment requires no mechanical profiling on clean, sound concrete and is compatible with in-floor heating systems. ARDEX K 15 is engineered for superior bonding, shrinkage control, and crack resistance, delivering a flat, level, and long-lasting surface under the most demanding flooring systems.

Whether you’re preparing a concrete slab for resilient flooring or smoothing a surface before installing tile, ARDEX K 15 provides the reliable, high-performance results professionals trust. It is easy to mix and pour, ensuring minimal downtime and maximum efficiency on every project.