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HMK S232 Stain Protection Water-Based Stone 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 & Dirt Protection
Reduces the penetration of common staining substances into porous surfaces
Natural Appearance
Provides protection without changing the surface’s color or finish
Vapor Permeability
Allows moisture vapor to continue moving through the treated material
Broad Material Compatibility
Seals natural stone, artificial stone, concrete, terracotta, brick, and unglazed tile
Water-Based Formula
Provides solvent-free, odorless protection for occupied buildings
Interior & Exterior Use
Protects compatible porous surfaces indoors and outdoors
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 Stone Sealer for Stain Protection
HMK® S232 Stain Protection is a solvent-free, water-based stone sealer that reduces the penetration of oil, water, grease, and dirt into porous surfaces. It provides dependable protection for natural stone, artificial stone, masonry, and unglazed tile used indoors or outdoors.
Penetrating Sealer That Preserves Natural Appearance
Rather than forming a visible surface coating, HMK S232 penetrates absorbent materials to provide protection from within. Treated surfaces remain vapor permeable and retain their natural appearance, making this impregnator suitable when stain resistance is needed without changing the color or finish.
Stone, Concrete and Unglazed Tile Sealer
HMK S232 is compatible with soft and hard natural stone, engineered stone, agglomerates, concrete, terracotta, brick pavers, clay surfaces, and unglazed tile. It is especially effective on highly absorbent honed and textured surfaces that benefit from deep penetrating protection.
Solvent-Free Formula for Occupied Buildings
The environmentally friendly, odorless formula allows buildings to remain occupied during treatment. Its combination of water-based chemistry, broad material compatibility, and interior and exterior performance makes HMK S232 a practical penetrating sealer for many residential and commercial stone installations.
Common Questions
Frequently Asked Questions
What does HMK S232 Stone Sealer protect against?
HMK® S232 helps reduce the penetration of oil, water, grease, and dirt into porous stone and masonry surfaces. The product reduces absorption rather than creating an impermeable barrier, allowing treated materials to remain vapor permeable while receiving penetrating stain protection.
What materials can HMK S232 be used on?
HMK S232 is suitable for soft and hard natural stone, artificial stone, engineered stone, agglomerates, concrete, terracotta, brick pavers, clay surfaces, and unglazed tile. It is especially effective on highly absorbent honed and textured materials that benefit from deep penetrating protection.
Will HMK S232 change the appearance of the surface?
No. HMK S232 is designed to protect without causing an aesthetic change to the treated surface. Because the impregnator works below the surface and remains vapor permeable, the stone retains its natural appearance while moisture vapor can continue moving through the material.
Is HMK S232 a penetrating sealer or topical coating?
HMK S232 is a water-based penetrating sealer, also described as an impregnator, rather than a topical film-forming tile sealer. It penetrates absorbent material to reduce oil, water, grease, and dirt intrusion while leaving the surface vapor permeable and visually unchanged.
How should the surface be prepared before applying HMK S232?
Clean the surface thoroughly with diluted HMK R155, flood rinse to remove cleaner residue, then allow at least 24 hours of drying. Residual moisture must be no more than 4 to 6 percent. New installations may require several days or weeks to dry, and underfloor heating must be switched off.
How long does HMK S232 take to develop protection?
Avoid foot traffic for 8 to 12 hours after treatment and protect the surface from rain and humidity for 12 hours. Full resistance to oil and water develops over approximately 48 hours. Highly absorbent surfaces may require an additional application after 1 to 2 hours.
How much area does HMK S232 cover?
Coverage varies with surface absorption. One liter covers approximately 55 to 165 square feet, while five liters covers approximately 275 to 825 square feet. Highly absorbent honed or textured materials may use more product than denser surfaces, so test a small area to estimate project requirements.
Can HMK S232 be used in occupied buildings?
Yes. HMK identifies S232 as a solvent-free, odorless, environmentally friendly product that allows buildings to remain occupied during application. It is suitable for interior and exterior use, and once dry, the remaining material is not harmful and complies with food hygiene standards.