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HMK S237 Color-Enhancing Satin Stone Sealer
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At a Glance
Quick Decision Guide
Container Size
0.25 Liter
Coverage
Up to 15 sq ft
Finish
Satin
Application
Interior Only
Color Enhancement
Yes
UV Resistant
Yes
Slip Retardant
Yes
Suitable Surfaces
Honed & Textured Stone, Concrete & Terrazzo
Why Choose This Product
Key Benefits
Color Enhancement
Enriches the natural color and structure of honed and textured mineral surfaces
Durable Satin Finish
Creates a tough protective layer with a refined low-sheen appearance
Water, Dirt and Grease Protection
Reduces contaminant penetration into absorbent surfaces
Easier Routine Care
Makes rough and textured surfaces easier to clean and maintain
Versatile Interior Use
Protects compatible natural stone, agglomerates, concrete, and terrazzo
UV and Slip Resistance
Combines UV-resistant performance with a slip-retardant finish
Product Information
Product Details
Specifications
Brand
HMK®
Part Number
S237
Product Type
Stone Sealer
Container Size
0.25 Liter
Coverage
Up to 15 sq ft
Finish
Satin
Sealer Type
Modified Silicone/Acrylic
Ready to Use
Yes
Color Enhancement
Enhances Natural Stone Color & Structure
Protection
Water, Dirt & Grease Resistant
Suitable Surfaces
Honed, Brushed, Sandblasted, Flamed & Riven Natural Stone
Compatible Materials
Natural Stone, Agglomerates, Concrete & Terrazzo
Application
Interior Only
UV Resistant
Yes
Slip Retardant
Yes
Cleaning Benefit
Facilitates Routine Cleaning & Maintenance
Recommended Surface
Absorbing Honed & Textured Mineral Surfaces
Not Recommended For
Wet Areas, Polished Stone, Glazed & Non-Absorbing Surfaces
About This Product
Color-Enhancing Satin Stone Sealer
HMK® S237 Stone Sealer is a ready-to-use modified silicone and acrylic surface sealer that enriches the natural color and structure of absorbent mineral surfaces. It creates a tough satin finish while reducing the penetration of water, dirt, and grease into the treated material.
Protective Finish for Easier Maintenance
The hard, protective finish makes rough and textured surfaces easier to clean and maintain while providing a refined satin appearance. UV-resistant and slip-retardant properties add practical performance for suitable interior installations.
Made for Honed and Textured Mineral Surfaces
HMK S237 is formulated for honed, brushed, sandblasted, flamed, and riven soft or hard natural stone. It is also compatible with absorbent agglomerates, concrete, and terrazzo, providing versatile protection for interior surfaces that benefit from both color enhancement and a finished appearance.
Common Questions
Frequently Asked Questions
What surfaces can HMK S237 Stone Sealer be used on?
HMK S237 is made for honed, brushed, sandblasted, flamed, and riven soft or hard natural stone. It is also suitable for compatible absorbent agglomerates, concrete, and terrazzo. Always test an inconspicuous area first to confirm absorption, appearance, and product suitability.
Does HMK S237 change the appearance of the surface?
Yes. HMK S237 enriches the natural color and structure of the material and leaves a satin finish rather than an unchanged natural appearance. The amount of enhancement can vary by surface and porosity, so testing beforehand helps confirm the expected result.
What does HMK S237 protect against?
HMK S237 reduces the penetration of water, dirt, and grease while creating a tough, hard surface finish. This added protection also makes rough and textured materials easier to clean during regular maintenance. The manufacturer describes the treatment as reducing penetration rather than waterproofing the surface.
Is HMK S237 a water-based impregnator or penetrating sealer?
HMK describes S237 as a modified silicone and acrylic surface sealer, not as a water-based impregnator. It intentionally enhances the material’s color and structure while leaving a visible satin finish. This distinction is important when choosing between a decorative surface sealer and an impregnator sealant.
Where should HMK S237 not be used?
HMK S237 is for interior use only and should not be used in showers, wet areas, or exterior installations. It is also unsuitable for polished stone, glazed materials, non-absorbing surfaces, rubber, plastics, lacquered or varnished finishes, and other solvent-sensitive materials.
How should the surface be prepared before sealing?
The surface must be chemically clean, dry, and absorbent. HMK recommends cleaning with diluted R155 Intensive Cleaner, flood rinsing with water, and allowing at least 24 hours of drying to reach 2 to 4 percent residual moisture. Underfloor heating should be switched off so the surface can cool first.
Is HMK S237 ready to use, and how many coats are needed?
HMK S237 is supplied ready to use and should be applied generously and evenly without allowing it to puddle. One or two applications are usually sufficient, depending on surface porosity and the desired enhancement. A second application may be made after 12 hours when additional enhancement is wanted.
How much area does HMK S237 cover?
The manufacturer lists approximate coverage of 15 square feet for 1/4 liter, 60 to 100 square feet for 1 liter, and 300 to 500 square feet for 5 liters. Actual coverage varies with the surface, so testing a small area can help estimate product requirements.