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HMK S242 Color-Enhancing Stone Impregnator
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At a Glance
Quick Decision Guide
Container Size
0.25 Liter
Coverage
25–35 sq ft
Finish Compatibility
Polished, Honed & Textured
Application
Interior & Exterior
Color Enhancement
Yes
Water Resistance
Reduces Water Penetration
Vapor Permeable
Yes
Oil & Grease Protection
No
Why Choose This Product
Key Benefits
Enhanced Stone Appearance
Brings out the natural color, grain, and structure of the material
Water and Dirt Resistance
Reduces penetration to help treated surfaces stay cleaner
Breathable Protection
Preserves moisture vapor transmission with only a slight reduction
Multiple Finish Compatibility
Works on polished, honed, and textured stone surfaces
Interior and Exterior Use
Protects compatible wall and floor surfaces indoors or outdoors
Easier Routine Maintenance
Helps reduce dirt buildup and problems associated with exterior organic growth
Product Information
Product Details
Specifications
Brand
HMK®
Part Number
S242
Product Type
Solvent-Based Color Enhancer
Container Size
0.25 Liter
Coverage
25–35 sq ft
Sealer Type
Penetrating Impregnator
Base
Solvent-Based
Color Enhancement
Yes
Water Resistance
Reduces Water Penetration
Dirt Resistance
Reduces Dirt Penetration
Finish Compatibility
Polished, Honed & Textured
Surface Compatibility
Natural Stone, Agglomerates, Reconstituted Stone & Terrazzo
Application Areas
Walls & Floors
Application
Interior & Exterior
Vapor Permeability
Slightly Diminished
Algae & Fungus Reduction
Helps Reduce Exterior Growth
Oil & Grease Protection
No
Ready to Use
Yes
About This Product
Color-Enhancing Impregnator for Natural Stone
HMK® S242 is a ready-to-use, solvent-based stone impregnator that deepens the natural color of stone and brings out its grain and structure. It provides customers with a richer stone appearance while protecting against water and dirt without adding a surface coating.
Penetrating Protection That Preserves Breathability
The impregnating formula works below the surface to reduce the absorption of water and dirt, helping treated stone stay cleaner and easier to maintain. Vapor transmission is only slightly reduced, allowing the material to remain breathable after treatment.
Versatile Stone Sealer for Interior and Exterior Surfaces
HMK S242 can be used on polished, honed, and textured soft or hard natural stone, agglomerates, reconstituted stone, and terrazzo. It is well suited for interior and exterior walls and floors, while exterior treatment also helps reduce problems associated with algae and fungus.
Common Questions
Frequently Asked Questions
What surfaces and finishes can HMK S242 be used on?
HMK S242 can be used on soft and hard natural stone, agglomerates, reconstituted stone, and terrazzo. It is compatible with polished, honed, and textured finishes. Because stone composition and absorption vary, HMK recommends testing an inconspicuous area to confirm appearance, suitability, coverage, and performance.
Does HMK S242 change the appearance of stone?
Yes. The impregnator deepens the stone's natural color and brings out its grain and structure without creating a decorative surface coating. The degree of enhancement varies with the material and finish, so testing a small area is the best way to preview the final appearance.
What does HMK S242 protect against?
HMK S242 reduces the penetration of water and dirt, which helps simplify regular cleaning and maintenance. It is not formulated to resist oil or grease, so it should not be selected when protection from oily staining is a primary requirement.
Is HMK S242 a water-based impregnator?
No. HMK S242 is a ready-to-use, solvent-based impregnator rather than a water-based impregnator sealant. Its formulation contains a turpentine substitute and is flammable, so it should be used with adequate ventilation and kept away from heat, sparks, and flame according to the manufacturer's directions.
Can HMK S242 be used indoors and outdoors?
Yes. HMK S242 is suitable for interior and exterior wall and floor surfaces. On outdoor installations, reducing water and dirt penetration can also help limit algae, fungus, and similar problems associated with exposure while the enhanced color highlights the stone's natural character.
Does HMK S242 allow the treated stone to remain breathable?
Yes. HMK states that vapor permeation is only slightly diminished after treatment, so the stone remains breathable. This is useful for mineral surfaces where moisture vapor transmission needs to continue through the material while the impregnator reduces water and dirt penetration.
How should the surface be prepared before applying HMK S242?
Clean the surface with diluted HMK R155 Intensive Cleaner, flood rinse it with water, and allow at least 24 hours of drying before treatment. The maximum residual moisture should be 2 to 4 percent. One saturating wet-on-wet application is usually sufficient, although more absorbent surfaces may require additional product.
How much area does HMK S242 cover?
Approximate coverage is 25 to 35 square feet for 1/4 liter, 75 to 150 square feet for 1 liter, and 375 to 750 square feet for 5 liters. Actual coverage depends on the finish and stone porosity, so testing a small section helps estimate the amount required.