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HMK S232 Stain Protection Penetrating Sealer
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At a Glance
Quick Decision Guide
Container Size
1 Liter
Coverage
55–165 sq ft
Formula
Water-Based
Sealer Type
Penetrating Impregnator
Finish Change
None
Vapor Permeable
Yes
Application
Interior & Exterior
VOC
Solvent Free
Why Choose This Product
Key Benefits
Oil, Water, Grease and Dirt Protection
Reduces how readily common staining substances penetrate porous surfaces
Natural Appearance
Protects from within without causing an aesthetic change to the treated material
Vapor Permeability
Allows moisture vapor to continue moving through the sealed surface
Absorbent Surface Performance
Provides penetrating protection well suited to honed and textured materials
Solvent-Free Formula
Offers odorless, water-based treatment that allows buildings to remain occupied
Indoor and Outdoor Versatility
Protects compatible natural stone, artificial stone, masonry and unglazed tile inside or outside
Product Information
Product Details
Specifications
Brand
HMK®
Part Number
S232-1
Product Type
Penetrating Stone Sealer
Container Size
1 Liter
Coverage
55–165 sq ft
Formula
Water-Based
Sealer Type
Solvent-Free Impregnator
Protection
Oil, Water, Grease & Dirt
Appearance Change
None
Vapor Permeable
Yes
Odor
Odorless
Environmentally Friendly
Yes
Application
Interior & Exterior
Suitable Materials
Natural Stone, Artificial Stone, Agglomerates, Concrete, Terracotta, Brick Pavers, Clay Surfaces & Unglazed Tile
Recommended Surfaces
Honed & Textured High-Absorption Surfaces
Surface Preparation
Clean with HMK® R155 Intensive Cleaner and allow surface to dry completely
Maximum Residual Moisture
4–6%
Underfloor Heating
Turn Off Before Application
Building Occupancy
Suitable for Occupied Buildings During Application
About This Product
Water-Based Protection Against Oil, Water and Dirt
HMK S232 Stain Protection is a solvent-free, water-based impregnating sealer that reduces the penetration of oil, water, grease and dirt into porous materials. By working within the absorbent surface instead of forming a visible film, it provides practical stain protection while helping stone, masonry and unglazed tile retain their original character.
Natural-Look Penetrating Sealer for Absorbent Surfaces
HMK S232 remains vapor permeable after treatment and does not cause an aesthetic change to the surface. This makes it particularly well suited to highly absorbent honed and textured materials where dependable protection is needed without changing the material’s natural color or finish.
HMK Natural Stone Sealer for Indoor and Outdoor Use
Designed for soft and hard natural stone, artificial stone, agglomerates, concrete, terracotta, brick pavers, clay surfaces and unglazed tile, this stone sealer supports a wide range of interior and exterior projects. Its odorless, environmentally friendly formula allows buildings to remain occupied during treatment, providing a practical option when closing the space is inconvenient.
Common Questions
Frequently Asked Questions
What does HMK S232 protect against?
HMK S232 reduces the penetration of oil, water, grease and dirt into absorbent materials. Instead of forming an impermeable surface barrier, the water-based impregnator penetrates the substrate, helping limit absorption while allowing moisture vapor to continue moving through the treated material.
What surfaces can HMK S232 be used on?
It is intended for soft and hard natural stone, artificial stone, agglomerates, concrete, terracotta, brick pavers, clay surfaces and unglazed tile. The formula is especially useful on highly absorbent honed or textured materials and may be used on compatible interior and exterior surfaces.
Will HMK S232 change the appearance of the surface?
HMK S232 is a penetrating impregnator rather than a film-forming topical coating. The manufacturer states that treated surfaces remain vapor permeable and experience no aesthetic change, allowing porous stone and tile to retain their natural color and finish while receiving protection below the surface.
How should the surface be prepared before applying HMK S232?
The surface must be chemically clean and completely dry. HMK recommends cleaning with diluted R155, flood rinsing away remaining cleaner and waiting at least 24 hours, with residual moisture no higher than 4 to 6 percent. Switch off underfloor heating and allow new installations additional drying time as needed.
How is HMK S232 applied to absorbent surfaces?
Shake the container thoroughly because the active material can settle during storage. Apply the product evenly with a soft-bristle brush or lint-free cloth at temperatures from 50°F to 80°F. Highly absorbent surfaces may need another application after one to two hours; follow the label for wet-on-wet application.
How long does HMK S232 take to develop protection?
Keep foot traffic off the treated surface for 8 to 12 hours and protect it from rain and humidity for 12 hours. Resistance to oil and water develops over approximately 48 hours, so the surface should remain protected during this period while the impregnator develops its intended performance.
How much area does HMK S232 cover?
Coverage depends on how readily the surface absorbs the sealer. One liter covers approximately 55 to 165 square feet, while five liters covers approximately 275 to 825 square feet. Test an inconspicuous area first to confirm suitability, coverage and performance for the specific material.
Can HMK S232 be used in occupied buildings?
Yes. HMK describes the solvent-free, odorless formula as suitable while buildings remain occupied and states that once dry, the residual material is not harmful and complies with food hygiene standards. It remains a chemical product, so avoid ingestion and eye or skin contact, keep it away from children and follow label precautions.