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HMK S235 Color-Enhancing Matte Stone Sealer
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At a Glance
Quick Decision Guide
Container Size
1 Liter
Coverage
80–120 sq ft
Finish
Matte
Color Enhancement
Yes
UV Resistant
Yes
Slip Retardant
Yes
Application
Interior & Conditional Exterior
Suitable Surfaces
Honed & Textured Stone
Why Choose This Product
Key Benefits
Color Enhancement
Enriches the natural color and structure of absorbent mineral surfaces
Durable Matte Finish
Creates a tough, hard protective surface with a low-sheen appearance
Surface Protection
Reduces the penetration of water, dirt, and grease
Broad Material Compatibility
Seals absorbent natural stone, agglomerates, concrete, and terrazzo
Easier Maintenance
Makes rough and textured surfaces easier to clean and maintain
UV-Resistant & Slip-Retardant
Supports lasting appearance and traction on treated surfaces
Product Information
Product Details
Specifications
Brand
HMK®
Part Number
S235-1
Product Type
Color-Enhancing Stone Sealer
Container Size
1 Liter
Coverage
80–120 sq ft
Finish
Matte
Sealer Base
Modified Silicone/Acrylic
Color Enhancement
Yes
Water Resistance
Helps Reduce Water Penetration
Stain Resistance
Helps Reduce Dirt & Grease Penetration
UV Resistant
Yes
Slip Retardant
Yes
Application
Interior & Conditional Exterior
Suitable Surfaces
Honed, Brushed, Sandblasted, Flamed & Riven Natural Stone, Agglomerates, Concrete & Terrazzo
Wet Area Use
No
Polished Surface Use
No
Glazed Surface Use
No
Non-Absorbing Surface Use
No
Ready to Use
Yes
About This Product
Color-Enhancing Stone Sealer
HMK® S235 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 reduces the penetration of water, dirt, and grease while creating a protective matte finish.
Durable Matte Finish for Textured Surfaces
The tough, hard protective finish is UV resistant and slip retardant, providing added performance for honed and textured materials. HMK S235 also makes rough surfaces easier to clean and maintain, helping preserve their enhanced appearance through routine care.
For Natural Stone, Concrete and Terrazzo
HMK S235 is designed for honed, brushed, sandblasted, flamed, and riven soft or hard natural stone. It is also compatible with absorbent agglomerates, concrete, and terrazzo, making it a versatile matte sealer for interior and conditional exterior applications.
Common Questions
Frequently Asked Questions
What surfaces can HMK S235 Stone Sealer be used on?
HMK® S235 is designed for honed, brushed, sandblasted, flamed, and riven soft or hard natural stone. It can also be used on compatible agglomerates, concrete, and terrazzo. The surface must be absorbent, so testing a hidden area is recommended before sealing the entire installation.
Does HMK S235 change the appearance of stone?
Yes. HMK S235 deliberately enhances the natural color and structure of the treated material while leaving a matte finish. The amount of enhancement depends on surface porosity and the number of applications, so test an inconspicuous area first to confirm the desired appearance.
What does HMK S235 protect against?
HMK S235 reduces the penetration of water, dirt, and grease while creating a tough protective finish. The sealed surface becomes easier to clean and maintain, especially when the original material is rough or textured. It provides protection but should not be considered completely waterproof.
Is HMK S235 a water-based or penetrating sealer?
No. HMK S235 is a solvent-based silicone and acrylic surface sealer, not a water-based impregnator or penetrating sealer. It forms a color-enhancing matte finish instead of providing invisible protection. Use adequate ventilation and keep the flammable product away from heat, sparks, and flames.
Can HMK S235 be used outdoors or in wet areas?
HMK S235 is intended primarily for interior surfaces and only for conditional exterior applications on suitable absorbent materials. It should not be used in wet areas such as showers. Exterior suitability depends on the material, exposure, preparation, and the manufacturer’s application requirements.
Can HMK S235 be applied to polished or glazed surfaces?
No. HMK S235 should not be applied to polished, glazed, or other non-absorbing surfaces because the sealer requires an absorbent texture to perform correctly. It should also be kept away from rubber, plastics, lacquered or varnished surfaces, and other materials that cannot tolerate solvents.
How should the surface be prepared and sealed with HMK S235?
Clean the surface with diluted HMK R155, flood rinse, and allow at least 24 hours of drying until residual moisture is 2 to 4 percent. Apply one or two even coats based on porosity and desired enhancement, avoid puddling, then allow 4 to 6 hours before foot traffic and protect from moisture for 12 hours.
How much area does HMK S235 cover?
Coverage depends on container size and surface absorption. A 0.25-liter container covers approximately 20 square feet, 1 liter covers 80 to 120 square feet, and 5 liters covers 400 to 600 square feet. Porous or heavily textured surfaces may require more product.