MARMOPOXY-BACKCOAT

MARMOPOXY BACKCOAT

MARMOPOXY BACKCOAT is a high-performance, three-component stain-resistant epoxy backcoating system designed specifically for natural stones, marbles, and mineral slabs. It consists of high-grade epoxy resin (Component A), polyamine hardener (Component B), and graded white silica fillers (Component C).

The system functions simultaneously as an impermeable moisture and stain-resistant barrier and as an adhesion promoter when fixing stone slabs using traditional cement-sand mortar beds or cement-based tile adhesives. The broadcast silica filler layer, spread immediately over the wet epoxy, creates a heavy, high-friction mechanical key that ensures powerful, permanent mechanical bonding during installation, completely overcoming the bond-breaking tendencies of traditional smooth epoxy coatings.

Key Highlights

• Three-Component Hybrid System: Combines solvent-free epoxy resin, curing hardener, and graded white silica aggregates for comprehensive protection and adhesion promotion.
• Superior Mechanical Bonding: Broadcasted silica fillers create an aggressive, textured mechanical key that locks stone securely into cement mortar beds and tile adhesives.
• Durable Moisture & Stain Barrier: Hermetically seals stone capillaries against water transmission, efflorescence, mineral salt leaching, and damp patch formation.
• Broad Chemical Resistance: Highly stable against alkaline lime water, ammonium (10%), soda lye (40%), salt water, sodium chloride solution (10%), mild organic/mineral acids, petrol, diesel, and oils.
• Substrate Versatility: Suitable for natural stone slabs, marble, granite, cement-based boards, and primed metal surfaces.
• Dependable Thermal & Mechanical Resilience: Operates effectively between -10°C and +80°C, resisting dynamic loads and thermal expansion.

Technical Specifications

Parameter / Property	Specification / Value
Product Name	MARMOPOXY BACKCOAT
System Type	3-Component System: Epoxy Resin, Hardener, Silica Fillers
Physical Appearance	White mixture after blending
Resin Density	~1.25 g/cm³
Mixing Ratio (Resin : Hardener)	2 : 1 by weight
Third Component (Aggregate)	Graded white silica fillers (broadcasted over wet epoxy)
Pot Life	30 – 40 minutes at 25°C
Application Temperature	+10°C to +35°C
Dry Film Thickness (DFT)	1 – 3 mm (including broadcast aggregate layer)
Drying Time (Touch Dry)	6 – 8 hours at 25°C
Full Cure Time	24 hours at 25°C (before tile fixing/installation)
Chemical Resistance	Stable against saturated calcium hydroxyl solution (lime water), Sodium Chloride Solution 10%, salt water, Ammonium 10%, Soda lye 40%, Acetic acid 10%, Formic acid 10%, Petrol, Diesel oil, Olive oil; Moderately stable against Hydrochloric acid 10%
Packaging Size	6.5 KG kit (Epoxy Resin + Hardener + Silica Fillers)
Shelf Life	12 months in original unopened packaging
Storage Conditions	Store in a cool, dry place away from direct sunlight and heat sources

Application & Handling

1. Surface Preparation Ensure the backside of the marble or natural stone slab is sound, completely clean, dry, and free of dust, cutting slurry, grease, wax, or cutting oils. Inspect and remove loose fiberglass mesh, detached resin backings, or peeling netting before application. Ensure the stone is completely dry internally, not merely surface-dry. Never apply onto wet or damp stone.

2. Mixing Procedure Combine Epoxy Resin and Hardener strictly in the recommended ratio of 2:1 by weight into a clean mixing pail. Mix thoroughly using a low-speed mechanical stirrer (300–400 RPM) for 2 to 3 minutes until a completely homogeneous, streak-free white mixture is achieved. Prepare only the quantity that can be comfortably applied within the 30–40 minute pot life at 25°C.

3. Application Method Apply the blended epoxy mixture evenly onto the reverse side of the stone slab using a roller, brush, or notched trowel, ensuring complete perimeter and edge coverage to prevent capillary moisture creep. Immediately while the epoxy coating remains wet and tacky, spread a dense, uniform layer of the dry white silica fillers across the entire surface. Ensure aggregates are evenly distributed over the wet resin to create a uniform, textured mechanical tooth.

4. Drying and Curing Allow the coated stone to remain undisturbed for 6 to 8 hours to reach initial touch-dry state at 25°C. Allow 24 hours for full chemical cure before installing the stone slab using cement-based tile adhesives or cement mortar beds. Before installation, lightly brush off any loose, unbounded excess silica aggregates.

Do’s

• Ensure the backside of the stone is completely clean, dry, and free from cutting slurry or grease.
• Remove loose fiberglass mesh or unstable backing before application.
• Maintain a uniform coating with a recommended dry film thickness of 1–3 mm.
• Seal slab edges thoroughly to avoid perimeter moisture ingress.
• Allow 6–8 hours drying before handling and a full 24 hours cure before installation.
• Broadcast silica aggregates evenly across the entire wet epoxy surface.
• Ensure the stone is fully dry before installation after coating.

Don’ts

• Do NOT apply on wet, damp, or moisture-saturated stone slabs.
• Do NOT exceed the recommended film thickness, which may affect adhesive bed bedding.
• Do NOT fix marble onto substrate before the epoxy coating has fully cured (minimum 24 hours).
• Do NOT dilute or mix MARMOPOXY BACKCOAT with water, thinners, or solvents.
• Do NOT trap moisture between the coated stone and the concrete substrate during installation.

Storage & Safety

Storage: Store sealed in original packaging in a cool, dry area away from direct sunlight, frost, and sources of heat. Keep containers tightly sealed when not in use.

Handling: Work in well-ventilated areas. In case of skin or eye contact, rinse immediately with copious amounts of water and soap. Seek medical attention if breathing difficulties or irritation arises.

First aid:

• Disposal: Dispose of containers and chemical residues in accordance with local environmental regulations.

Frequently Asked Questions

What is MARMOPOXY BACKCOAT?
MARMOPOXY BACKCOAT is a specialized three-component epoxy backcoating system formulated with epoxy resin, hardener, and white silica fillers designed to seal stone slabs against moisture and stains while creating a heavy mechanical grip for cement-based adhesives and mortar.

Why is backcoating essential for natural stone and marble?
Natural stone is porous. Without a backcoating, moisture, cement alkalis, and minerals from wet screeds or mortar beds migrate upward through capillaries, causing dark water patches, efflorescence, and discoloration.

How does MARMOPOXY BACKCOAT promote adhesion with cement mortar?
Traditional epoxy coatings leave a slick, non-porous plastic surface that cement cannot bond to. MARMOPOXY BACKCOAT solves this by broadcasting dry silica fillers over the wet epoxy, creating a rough mechanical key that locks into cement mortars and tile adhesives.

What is the mixing ratio of MARMOPOXY BACKCOAT?
The mixing ratio is strictly 2 parts Epoxy Resin to 1 part Hardener by weight (2:1).

When should the silica fillers be applied?
The silica aggregates must be broadcasted immediately after the epoxy resin mixture is applied, while the epoxy layer is still wet and tacky.

What is the working pot life of MARMOPOXY BACKCOAT?
The pot life is 30 to 40 minutes at 25°C. Only mix the quantity that can be applied within this duration.

How long does MARMOPOXY BACKCOAT take to dry and cure?
It reaches touch-dry state in 6 to 8 hours at 25°C, and requires 24 hours for full cure before installing with cement mortar or adhesives.

Can MARMOPOXY BACKCOAT be applied over factory fiberglass mesh?
If the fiberglass mesh is structurally intact, well-adhered, and free of oil or loose debris, it can be coated directly. Any peeling or loose mesh must be removed prior to application.

What is the chemical resistance of MARMOPOXY BACKCOAT?
It is highly resistant to saturated lime water, 10% sodium chloride, 40% soda lye, 10% ammonium, mild acids, petrol, diesel, and olive oil.

Can MARMOPOXY BACKCOAT be thinned with solvents or water?
No. Never add water, thinners, or solvents. Dilution ruins stoichiometric balance, slows down curing, and weakens bond performance.

What tools are recommended for application?
Apply the blended epoxy using a brush, roller, or trowel, and scatter the silica fillers by hand or aggregate broadcast roller.

What is the recommended dry film thickness?
The recommended dry film thickness is 1 to 3 mm, encompassing the epoxy barrier and aggregate layer.

Why is perimeter edge coverage critical?
Coating slightly around slab edges prevents lateral moisture ingress and capillary suction from perimeter grout lines.

What size packaging is MARMOPOXY BACKCOAT sold in?
It comes packaged as a complete 6.5 KG kit containing Epoxy Resin, Hardener, and Silica Fillers.

Can MARMOPOXY BACKCOAT be applied to damp or freshly cut stone?
No. Slabs must be completely dry throughout their internal core before coating; trapped water prevents epoxy adhesion and promotes future delamination.

What substrates is MARMOPOXY BACKCOAT suitable for?
It is suitable for natural stone slabs, marble, granite, cement boards, and primed metal surfaces.

What should be done with loose silica sand before installation?
After the 24-hour cure, lightly sweep or vacuum away excess unbounded silica sand prior to bedding into tile adhesive or mortar.

What is the shelf life of MARMOPOXY BACKCOAT?
The product maintains a shelf life of 12 months in unopened, original packaging stored in cool, dry conditions.

What PPE should be worn during application?
Wear chemical-resistant gloves, safety eyewear, and a protective mask, and ensure proper room ventilation.

MARMOPOXY BACKCOAT W

MARMOPOXY BACKCOAT W is a specialized three-component, milky-white, stain-resistant epoxy backcoating system specifically engineered for white and light-colored natural stones, including Thassos, Statuario, Carrara, and delicate crystalline marbles. Comprising high-grade epoxy resin (Component A), polyamine hardener (Component B), and graded white silica fillers (Component C), this advanced system forms an impenetrable barrier against rising moisture, sub-base alkali migration, and cementitious discoloration. Concurrently, the broadcasted silica aggregate creates an aggressive, high-grip mechanical key that promotes maximum bond strength when installing stone with conventional cement mortars or cement-based tile adhesives.

Key Highlights

• Engineered for White Natural Stones: Milky-white aesthetic prevents shadowing, darkening, or telegraphing through translucent white marble and onyx slabs.
• Three-Component Hybrid System: Combines solvent-free epoxy resin, curing hardener, and graded white silica aggregates for comprehensive protection and bonding.
• High Mechanical Key & Adhesion Promotion: The broadcast silica filler layer locks into setting beds, overcoming the slickness of traditional epoxy coatings and ensuring powerful mechanical adhesion with cement mortar and adhesives.
• Superior Stain & Moisture Barrier: Hermetically seals stone capillaries against water transmission, efflorescence, mineral salt leaching, and damp patch formation.
• Broad Chemical Resistance: Highly stable against alkaline lime water, ammonium, soda lye (40%), salt water, mild organic/mineral acids, petrol, and oils.
• Substrate Versatility: Highly effective on white marble, granite, composite stones, cementitious boards, and metal substrates.

Technical Specifications

Parameter / Property	Specification / Value
Product Name	MARMOPOXY BACKCOAT W
Product System	3-Component System: Epoxy Resin, Hardener, Silica Fillers
Physical Appearance	Milky-white mixture after blending
Resin Density	~1.25 g/cm³
Mixing Ratio (Resin : Hardener)	2 : 1 by weight
Third Component (Aggregate)	Graded white silica fillers (broadcasted over wet epoxy)
Pot Life	30 – 40 minutes at 25°C
Application Temperature	+10°C to +35°C
Dry Film Thickness (DFT)	1 – 3 mm (including broadcast aggregate layer)
Drying Time (Touch Dry)	6 – 8 hours at 25°C
Full Cure Time	24 hours at 25°C (before tile fixing/installation)
Chemical Resistance	Stable against saturated calcium hydroxyl solution (lime water), Sodium Chloride Solution 10%, salt water, Ammonium 10%, Soda lye 40%, Acetic acid 10%, Formic acid 10%, Petrol, Diesel oil, Olive oil; Moderately stable against Hydrochloric acid 10%
Packaging Size	6.5 KG kit (Epoxy Resin + Hardener + Silica Fillers)
Shelf Life	12 months in original unopened packaging
Storage Temperature / Conditions	Store in a cool, dry place away from direct sunlight and heat sources

Application & Handling

1. Surface Preparation Ensure the backside of the white marble slab is sound, completely clean, dry, and free of dust, cutting slurry, grease, or cutting oils. Inspect and remove loose fiberglass mesh, detached resin backings, or peeling netting before application. Ensure the stone is completely dry internally, not merely surface-dry. Never apply onto wet or damp marble.

2. Mixing Procedure Combine Epoxy Resin and Hardener strictly in the recommended ratio of 2:1 by weight into a clean mixing pail. Mix thoroughly using a low-speed mechanical stirrer (300–400 RPM) for 2 to 3 minutes until a completely homogeneous, streak-free white mixture is achieved. Prepare only the quantity that can be applied within the 30–40 minute pot life.

3. Application Method Apply the blended epoxy mixture evenly onto the reverse side of the marble slab using a roller, brush, or notched trowel, ensuring complete perimeter and edge coverage to prevent capillary moisture creep. Immediately while the epoxy coating remains wet and tacky, spread a dense, uniform layer of the dry white silica fillers across the entire surface. Ensure aggregates are evenly distributed over the wet resin to create a uniform, textured mechanical tooth.

4. Drying and Curing Allow the coated stone to remain undisturbed for 6 to 8 hours to reach initial touch-dry state at 25°C. Allow 24 hours for full chemical cure before installing the marble slab using cement-based tile adhesives or cement mortar beds. Before installation, lightly brush off any loose, unbounded excess silica aggregates.

Do’s

• Ensure the backside of white marble is fully clean, dry, and free of cutting slurry.
• Remove loose fiberglass mesh before coating.
• Maintain a uniform coating with a recommended dry film thickness of 1–3 mm.
• Seal slab edges thoroughly to avoid perimeter moisture ingress.
• Allow 6–8 hours drying before handling and a full 24 hours cure before installation.
• Broadcast silica aggregates evenly across the entire wet epoxy surface.

Don’ts

• Do NOT apply on wet, damp, or moisture-saturated marble.
• Do NOT exceed the recommended film thickness, which may affect adhesive bed bedding.
• Do NOT fix marble onto substrate before the epoxy coating has fully cured (minimum 24 hours).
• Do NOT dilute or mix MARMOPOXY BACKCOAT W with water, thinners, or solvents.
• Do NOT trap moisture between the coated stone and the concrete substrate during installation.

Storage & Safety

Storage: Store sealed in original packaging in a cool, dry area away from direct sunlight, frost, and sources of heat.

Handling: Work in well-ventilated areas. In case of skin or eye contact, rinse immediately with copious amounts of water and soap. Seek medical attention if irritation persists.

First aid:

• Disposal: Dispose of containers and chemical residues in accordance with local environmental regulations.

Frequently Asked Questions

What is MARMOPOXY BACKCOAT W?
MARMOPOXY BACKCOAT W is a three-component milky-white epoxy backcoating system formulated with epoxy resin, hardener, and white silica fillers specifically designed to seal and promote adhesion on white and light-colored natural stones.

Why is backcoating critical for white marble slabs?
White marble (like Thassos, Statuario, and Carrara) is highly porous and translucent. Without an impermeable backcoat, moisture and dark alkaline minerals from cement beds leach upward, causing yellowing, grey shadowing, and rust stains.

Why does MARMOPOXY BACKCOAT W use white silica fillers?
Broadcasting white silica fillers onto the wet epoxy creates a rough, high-friction mechanical key that allows cement-based tile adhesives and mortars to bond securely to the otherwise smooth epoxy film.

What is the mixing ratio of the epoxy components?
The mixing ratio is 2 parts Epoxy Resin to 1 part Hardener by weight (2:1).

When are the silica aggregates applied?
The white silica aggregates must be broadcasted immediately after the epoxy resin mixture is applied, while the resin coating is still wet and receptive.

Will MARMOPOXY BACKCOAT W show through translucent white marble?
No. Its formulation cures into a clean milky-white background that prevents unsightly dark shadowing or bleed-through on translucent white marble and onyx.

How long is the pot life of the mixed epoxy?
The pot life is 30 to 40 minutes at 25°C. Only mix what can be applied within this timeframe.

What is the drying and curing timeline?
It achieves touch-dry state in 6 to 8 hours at 25°C and reaches full chemical cure after 24 hours, after which the marble is ready for fixing.

Can MARMOPOXY BACKCOAT W be applied over existing fiberglass mesh?
If the mesh is factory-applied, structurally intact, and free of oil or dust, it can be coated directly. Any loose, peeling, or deteriorating mesh must be completely removed first.

What is the chemical resistance of MARMOPOXY BACKCOAT W?
It is highly resistant to saturated lime water, 10% sodium chloride, 40% soda lye, 10% ammonium, mild acids, petrol, diesel, and olive oil.

Can it be diluted with thinners or water?
No. Never add water, solvent, or thinners. Dilution ruins the stoichiometry, impairs cure kinetics, and weakens bond performance.

What tools are recommended for application?
Apply the mixed epoxy using a roller, paintbrush, or trowel, then scatter the silica aggregates by hand or aggregate broadcast roller.

What is the recommended film thickness?
The recommended overall dry film thickness is 1 to 3 mm, encompassing the epoxy barrier and aggregate layer.

Why is edge coverage important?
Coating slab edges slightly prevents lateral moisture ingress and capillary suction from perimeter grout lines.

What size packaging is MARMOPOXY BACKCOAT W sold in?
It comes packaged as a complete 6.5 KG kit containing Epoxy Resin, Hardener, and Silica Fillers.

Can MARMOPOXY BACKCOAT W be applied to damp or freshly cut stone?
No. Slabs must be completely bone-dry internally before coating; trapped water prevents epoxy adhesion and promotes future delamination.

Is MARMOPOXY BACKCOAT W suitable for substrates other than marble?
Yes. It can be applied on granite, sandstone, engineered quartz, cement boards, and primed metal surfaces.

What should be done with loose silica sand before installing the marble?
After the 24-hour cure, sweep or vacuum away excess unbounded silica sand prior to bedding into tile adhesive or mortar.

What is the shelf life of the product?
The product maintains a shelf life of 12 months in unopened, original packaging stored under cool, dry conditions.