Henry 547 UniPro Universal Underlayment Patch, 7 lb.

Achieve a smooth, professional-grade subfloor every time with the Henry 547 UniPro Universal Underlayment Patch. This high-performance, Portland cement–based compound mixes easily with water to fill and level cracks, gouges, seams and depressions in wood, concrete, terrazzo and ceramic substrates. Whether you’re a flooring contractor or a DIY enthusiast, its rapid 15-minute dry time and feather-edge application let you move on to tile, hardwood, vinyl or carpet installation without delay.

Ideal for interior projects, the Henry 547 underlayment patch delivers exceptional adhesion and a strong, mildew-resistant finish—no primer or additives required. From minor touch-ups to deep repairs, this versatile patch provides a flawless base for all your finished flooring.

Key Features

• Ready to mix: simply add water—no primers or special additives
• Feather-edge to several inches depth for both skim coats and deep repairs
• Dries in as little as 15 minutes for fast project turnaround
• Bonds to concrete, wood, ceramic tile and terrazzo
• Resists mold and mildew for a clean, durable surface
• Compatible with all major flooring types: tile, hardwood, laminate, vinyl and carpet

⚠️ WARNING: This product can expose you to Silica, crystalline known to the State of California to cause cancer. For more information, visit www.P65Warnings.ca.gov.