MARMOSEAL-W

MARMOSEAL-W is an advanced, water-based, high-performance hydrophobic water-repellent impregnating sealer engineered to protect porous natural stone and mineral surfaces from water ingress, moisture migration, and water-borne staining. Formulated with an active siloxane-based chemical matrix (~30% active solids content), MARMOSEAL-W penetrates deeply into the open microscopic capillaries of the stone without forming an artificial surface film. It preserves 100% of the authentic natural appearance, texture, color, and original sheen of the treated substrate. By establishing a microscopic, vapor-permeable hydrophobic barrier, MARMOSEAL-W allows internal moisture vapor to escape freely while repelling liquid water, efflorescence salts, moss, and atmospheric pollution. Suitable for both interior and exterior installations, it provides exceptional UV stability that prevents yellowing or degradation on exterior building facades, walkways, patios, and cladding.

Key Highlights

• Deep Penetrating Hydrophobic Protection: Deeply infiltrates stone pores to repel water and moisture, preventing dark water staining, capillary rise, and efflorescence salt blooms.
• Advanced Siloxane-Based Formulation: Ensures permanent sub-surface mineral bonding, long-lasting durability, and effortless routine cleaning.
• Non-Altering Natural Finish: Completely invisible once cured; leaves zero gloss, plastic film, or sticky topical residue, maintaining the natural look, texture, and slip resistance of the stone.
• 100% Vapor Permeable & Breathable: Allows internal moisture vapor to evaporate naturally, preventing subsurface moisture entrapment, spalling, and freeze-thaw damage.
• Outstanding UV Stability: Highly resistant to solar UV degradation and outdoor weathering; will not discolor or turn yellow over time.
• Versatile Interior & Exterior Performance: Suitable for indoor stone flooring and bathrooms as well as exterior architectural facades, walkways, and patios.
• Broad Substrate Compatibility: Ideal for marble, limestone, granite, sandstone, concrete, bricks, terracotta, and all porous mineral building materials.

Technical Specifications

Parameter / Property	Specification / Value
Product Name	MARMOSEAL-W
Product Classification	Water-based penetrating hydrophobic stone impregnating sealer
Active Chemical Base	Siloxane-based hydrophobic formulation
Physical Appearance	Milky white liquid (dries completely clear and invisible)
Solids Content	~30% active solids
Viscosity	Low viscosity (fluid, easy to apply, deep-penetrating)
Odour	Mild emulsion
UV Resistance	High UV stability (non-yellowing, weather-resistant)
Water Repellence	Excellent
Application Temperature Range	+5°C to +30°C (Ambient and surface temperature)
Service Temperature Range	-20°C to +70°C
Drying Time (Touch Dry)	1 – 2 hours at 25°C
Full Curing Time	24 hours at 25°C (full water repellency achieved)
Theoretical Coverage Rate	3 – 10 m² per litre (Granite / dense stone: up to 10 m²/L; Sandstone / Limestone: 3 – 5 m²/L)
Packaging Sizes	1 Litre, 5 Litres, and 20 Litres containers
Shelf Life	12 months in original, unopened packaging
Storage Temperature / Conditions	Store between +5°C and +25°C in a cool, dry place away from direct sunlight

Application & Handling

1. Surface Preparation The stone or masonry substrate must be structurally sound, completely clean, dry, and free of dust, oils, grease, waxes, efflorescence, and previous coatings. For optimal penetration, clean the substrate using a neutral pH stone cleaner (such as Marmocleaner-Mild) and allow it to dry completely. Ensure the stone is thoroughly dry internally, not merely surface-dry; trapped internal moisture impedes active siloxane penetration. Always perform a preliminary test patch on an inconspicuous area or off-cut tile to verify absorption rate, appearance, and suitability.

2. Application Procedure MARMOSEAL-W is supplied ready to use; do NOT dilute with water, thinners, or solvents. Shake the container well before dispensing. Apply MARMOSEAL-W evenly across the clean, dry substrate using a brush, lint-free microfiber roller, sponge, or low-pressure sprayer. Ensure a uniform, continuous wet film across the surface without dry spots. Second Coat on Porous Stones: For highly porous stones (such as sandstone, soft limestone, or unpolished travertine), apply a second coat approximately 15 to 20 minutes after the first coat ("wet-on-wet" or as soon as the first coat is absorbed). Crucial Step (Wipe-Off): Thoroughly wipe off and buff away any unabsorbed excess sealer pooling on the surface using a clean, dry microfiber cloth before it dries to avoid streaking or dried residue buildup.

3. Drying & Curing Schedule The surface reaches touch-dry condition in 1 to 2 hours, depending on ambient temperature and relative humidity. Protect treated surfaces from water, rainfall, and washing for at least 24 hours until full chemical crosslinking and water repellency are established. Do NOT walk on or wash the treated surface until the 24-hour cure window has elapsed.

Do’s

• Ensure the substrate is clean, dry, and free from dirt, oil, wax, or previous sealers before application.
• Perform a small test patch in an inconspicuous area prior to full treatment.
• Apply evenly using a brush, roller, sponge, or low-pressure sprayer.
• Allow the sealer to penetrate for the recommended dwell time.
• Remove all excess liquid from the surface before it dries to prevent streaking or haze.
• Apply a second coat after 15–20 minutes on highly porous stones.
• Allow the treated stone to cure for a full 24 hours before exposing it to water or rain.
• Store in original tightly sealed containers in a cool, dry location.

Don’ts

• Do NOT apply on wet, damp, or water-saturated surfaces.
• Do NOT apply during rain or when rainfall is expected within 24 hours of application.
• Do NOT apply on extremely hot surfaces (> 30°C) or under intense, direct scorching sunlight.
• Do NOT allow excess liquid to puddle or dry on top of the stone face.
• Do NOT dilute with water, thinners, acids, or mix with other chemicals.
• Do NOT walk on or wash the treated surface until the 24-hour cure time has elapsed.
• Do NOT use on non-absorbent, glazed, or vitreous surfaces that are incompatible with water-based impregnators.

Storage & Safety

Storage: Store sealed in original containers between +5°C and +25°C, away from direct sunlight, frost, and sources of heat.

Handling: Use appropriate personal protective equipment, including protective gloves and safety goggles, during application. Ensure good ventilation in enclosed workspaces.

First aid:

• Skin Contact: Wash thoroughly with mild soap and clean water. If irritation persists, seek medical advice.
• Eye Contact: Rinse cautiously with clean water for several minutes. Seek medical advice if irritation occurs.
• Inhalation: Move person to fresh air immediately. If breathing difficulties arise, seek prompt medical attention.
• Ingestion: Do not induce vomiting. Rinse mouth with clean water and seek immediate medical assistance.
• Disposal: Dispose of product residues and packaging according to local environmental regulations. Do not discharge into open drains or watercourses.

Frequently Asked Questions

What is MARMOSEAL-W?
MARMOSEAL-W is an advanced water-based, siloxane-based hydrophobic impregnating sealer engineered to protect porous natural stone and mineral surfaces from water damage and staining without altering their natural look.

How does MARMOSEAL-W work?
Its microscopic siloxane molecules penetrate deep into stone capillaries, chemically bonding to the mineral pore walls to create an invisible, water-repellent network that causes water to bead up and run off.

Does MARMOSEAL-W alter the color, texture, or sheen of natural stone?
No. It is an invisible, non-film-forming penetrating impregnator that preserves 100% of the authentic natural color, texture, and original sheen without creating an artificial gloss or slippery surface.

Is MARMOSEAL-W breathable?
Yes. It forms a vapor-permeable barrier that allows internal moisture vapor to escape freely into the atmosphere, preventing trapped subsurface dampness, efflorescence, and spalling.

Which stones and substrates are suitable for treatment with MARMOSEAL-W?
It is suitable for marble, granite, limestone, sandstone, travertine, concrete, terracotta, clay bricks, and other porous mineral building materials.

Can MARMOSEAL-W be used outdoors?
Yes. It features high UV resistance and operates across a service temperature range of -20°C to +70°C, making it ideal for exterior building facades, boundary walls, walkways, and patios.

What is the coverage rate of MARMOSEAL-W?
Coverage ranges between 3 and 10 m² per litre: low-porosity dense stones like granite yield up to 10 m²/L, while highly porous stones like sandstone or limestone yield 3 to 5 m²/L.

How fast does MARMOSEAL-W dry and cure?
It becomes touch dry within 1 to 2 hours at 25°C, and achieves full chemical curing and maximum hydrophobic water repellency after 24 hours.

Can MARMOSEAL-W be applied on wet or damp stone?
No. The substrate must be completely bone-dry. Moisture trapped inside stone pores prevents the siloxane active ingredients from penetrating and bonding.

When should a second coat be applied?
On highly porous stones like sandstone or unpolished limestone, apply a second coat approximately 15 to 20 minutes after the first coat, while the stone is still receptive.

Why must excess sealer be wiped off the surface?
Because MARMOSEAL-W is an impregnating sealer meant to reside inside stone capillaries, any surplus liquid left to puddle on the surface can dry into streaks or cloudy residue marks.

Does MARMOSEAL-W protect against oil and grease?
MARMOSEAL-W is primarily a hydrophobic water-repellent sealer. For dual hydrophobic and oleophobic protection against cooking oils and grease on kitchen countertops, use MARMOBARRIER, MARMOBARRIER-W, or MARMOIMPREGNATOR.

Can MARMOSEAL-W be diluted with water?
No. It is supplied ready to use. Adding water reduces the 30% solids concentration and impairs water-repellent performance.

What tools are recommended for application?
Apply using a clean paintbrush, short-nap microfiber roller, sponge, or low-pressure manual garden sprayer.

What is the solids content and pH of MARMOSEAL-W?
It features a high active solids content of ~30% and an alkaline-compatible siloxane emulsion formula.

How should sealed surfaces be cleaned and maintained?
Clean sealed stone surfaces regularly using only pH-neutral stone maintenance cleaners. Avoid harsh acidic or caustic chemical cleaners that can degrade the protective barrier.

Can MARMOSEAL-W be used on clay bricks and concrete pavers?
Yes. It provides outstanding water-beading protection and prevents damp patches, moss, and efflorescence on clay bricks, concrete pavers, and cement plaster.

What packaging sizes are available?
MARMOSEAL-W is available in 1 Litre, 5 Litres, and 20 Litres containers.

What is the shelf life and proper storage condition?
It has a shelf life of 12 months in unopened, original packaging stored between +5°C and +25°C in a cool, dry place away from direct sunlight and frost.