HMK® S239 – High Gloss Stone Sealer

High-Gloss Protective Sealer for Honed & Textured Natural Stone

HMK® S239 is a ready-to-use, silicone/acrylic-based stone sealer designed to protect and enhance the appearance of honed, brushed, sandblasted, flamed, and riven natural and artificial stone surfaces. This professional-grade sealer reduces the penetration of water, oil, grease, and dirt, while enriching the natural color and structure of stone with a brilliant high-gloss finish.

Formulated for interior use only, HMK® S239 is perfect for textured stone, concrete, terrazzo, and agglomerates. It is UV resistant, long-lasting, and makes everyday cleaning and maintenance easier — especially on rough or porous surfaces.

Key Benefits

✔ High Gloss Finish – adds a striking, reflective sheen to stone surfaces.
✔ Color Enhancing – brings out the natural structure and depth of stone.
✔ Protective Barrier – reduces absorption of water, dirt, grease, and stains.
✔ Slip Retardant & UV Resistant – safe for interior use with lasting performance.
✔ Ideal for honed, textured, and rough stone finishes including concrete and terrazzo.

Recommended Uses

• Honed natural stone

• Brushed, flamed, riven, or sandblasted surfaces

• Concrete and terrazzo

• Agglomerates and textured artificial stone

⚠️ Not suitable for polished or very fine honed stone, glazed ceramic, porcelain, or non-absorbing surfaces. Not for use in wet areas.

Application Instructions

1. Clean the surface thoroughly with HMK® R155 Intensive Cleaner (acid-free) and flood rinse with water. Allow the stone to dry completely (24+ hours, residual moisture < 4%).

2. Shake well and apply HMK® S239 generously and evenly with a natural bristle brush or HMK® Z950/Z951 brushes.

3. Do not allow puddling. One or two even coats are typically sufficient depending on porosity and color enhancement desired.

4. Drying time: approx. 4–6 hours. Protect from humidity and moisture for at least 12 hours.

5. For enhanced protection and maintenance, clean regularly with HMK® P324 Liquid Stone Soap.

Technical Details

• Product Type: High Gloss Stone Sealer (for interior use)

• Finish: Glossy, color-enhancing

• Unit Sizes: 0.25 Liter, 1 Liter, 5 Liter

• Coverage: ~15 sq. ft. (0.25L), 50–80 sq. ft. (1L), 250–400 sq. ft. (5L)

• Packaging: 30 x 0.25L | 12 x 1L | 2 x 5L

• Storage: Store in a cool, dry place. Keep lid tightly closed.

• Working Temperature: Apply between 50–80°F (10–25°C).

Safety & Testing

⚠️ Contains naphtha. Flammable. Keep away from heat, sparks, and flames. Avoid inhalation and skin/eye contact. Use only with adequate ventilation. Keep out of reach of children. Always test HMK® S239 in an inconspicuous area to confirm suitability, coverage, and final appearance.

Why Choose HMK® S239?

HMK® S239 is the ideal choice for interior honed and textured stone surfaces where both durability and aesthetics are essential. Its unique high-gloss finish not only enhances the natural beauty of stone but also creates a protective layer that simplifies cleaning and extends the life of your surfaces.

👉 Protect and beautify your stone surfaces with HMK® S239 High Gloss Stone Sealer — trusted worldwide for professional stone care.