Certified Business
With over 100,000 orders
With over 100,000 orders
HMK S239 Color-Enhancing High-Gloss Stone Sealer
Fast Shipping
Easy Returns
Secure Checkout
At a Glance
Quick Decision Guide
Container Size
1 Liter
Coverage
50–80 sq ft
Finish
High Gloss
Application
Interior Only
Color Enhancement
Yes
UV Resistant
Yes
Surface Type
Honed & Textured Stone
Ready to Use
Yes
Why Choose This Product
Key Benefits
Color Enhancement
Enriches the natural color and structure of absorbent mineral surfaces
High-Gloss Finish
Creates a tough protective surface with a polished appearance
Water, Dirt and Grease Protection
Reduces contaminant penetration into compatible materials
Easier Routine Care
Makes rough and textured surfaces easier to clean and maintain
UV-Resistant Formula
Adds dependable protection for suitable interior installations
Broad Material Compatibility
Seals compatible natural stone, agglomerates, concrete, and terrazzo
Product Information
Product Details
Specifications
Brand
HMK®
Part Number
S239-1
Product Type
Gloss Stone Surface Sealer
Container Size
1 Liter
Coverage
50–80 sq ft
Finish
High Gloss
Sealer Type
Modified Silicone/Acrylic
Ready to Use
Yes
Color Enhancement
Yes
Water Resistance
Reduces Water Penetration
Grease Resistance
Reduces Grease Penetration
Dirt Resistance
Reduces Dirt Penetration
UV Resistant
Yes
Application
Interior Only
Compatible Surfaces
Honed, Brushed, Sandblasted, Flamed & Riven Natural Stone, Agglomerates, Concrete & Terrazzo
Not Recommended For
Polished Stone, Very Fine Honed Stone, Glazed Ceramic, Porcelain & Non-Absorbing Surfaces
Wet Area Suitable
No
About This Product
Color-Enhancing High-Gloss Stone Sealer
HMK® S239 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, hard finish with a high-gloss appearance for a more polished and finished look.
Protective Finish for Easier Maintenance
The sealed surface reduces the penetration of water, dirt, and grease while making regular cleaning and maintenance easier. Its UV-resistant formula provides additional performance, particularly on rough and textured surfaces that can be more difficult to keep clean.
Made for Interior Stone, Concrete and Terrazzo
HMK S239 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 decorative protection for suitable interior mineral surfaces.
Common Questions
Frequently Asked Questions
What surfaces can HMK S239 Stone Sealer be used on?
HMK S239 is intended for absorbent honed, brushed, sandblasted, flamed, and riven soft or hard natural stone. It may also be used on compatible agglomerates, concrete, and terrazzo. Test an inconspicuous area first to confirm suitability, coverage, and the resulting appearance.
Does HMK S239 change the appearance of stone?
Yes. HMK S239 deepens the natural color and emphasizes the structure of the material while creating a high-gloss finish. The amount of enhancement depends on the surface and its porosity, so a test area is important for confirming the final appearance before treating the full installation.
What does HMK S239 protect against?
HMK S239 reduces the penetration of water, dirt, and grease into suitable absorbent surfaces. It also forms a tough, hard finish that makes regular cleaning and overall maintenance easier, particularly on rough and textured materials. The treatment reduces penetration but does not make the surface waterproof.
Is HMK S239 a water-based impregnator or penetrating sealer?
HMK identifies S239 as a modified silicone and acrylic surface sealer rather than describing it as a water-based impregnator or penetrating sealer. It contains naphtha and produces visible color enhancement with a high-gloss finish. This distinction matters because the selected sealer directly affects the finished appearance.
Can HMK S239 be used on polished stone or glazed tile?
No. HMK states that S239 is not effective on most polished or very finely honed stone because these surfaces may not absorb the treatment properly. It should also not be applied to glazed ceramic tile, glazed porcelain tile, or other non-absorbing materials.
Can HMK S239 be used outdoors or in wet areas?
HMK S239 is intended only for dry interior applications. It should not be used outdoors, in showers, or in other wet areas. The sealer must also be kept away from rubber, plastics, lacquered or varnished surfaces, and other materials that cannot tolerate solvents.
Is HMK S239 ready to use, and how should the surface be prepared?
HMK S239 is supplied ready to use and does not require dilution. 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 to dry to 2 to 4 percent residual moisture.
How much area does HMK S239 cover?
The manufacturer lists approximate coverage of 15 square feet for 1/4 liter, 50 to 80 square feet for 1 liter, and 250 to 400 square feet for 5 liters. Actual coverage varies with surface porosity and absorption, so testing a small area helps estimate product requirements.