MARMOLATEX-SBR47

MARMOLATEX-SBR47 is a versatile, high-performance styrene-butadiene copolymer latex (SBR) liquid emulsion featuring ~47% active solids content, engineered specifically for cementitious waterproofing slurries, bonding coats, and polymer modification of mortars, screeds, and tile adhesives. Its advanced synthetic polymer formulation substantially improves the flexural flexibility, tensile adhesion bond strength, and crack-bridging capability of cement-based materials while imparting exceptional resistance to water penetration, hydrostatic stress, and environmental weathering. Whether formulated as a 1:1 cementitious waterproofing membrane slurry or integrated into masonry mortars to replace mixing water, MARMOLATEX-SBR47 prevents shrinkage cracking, enhances workability, and ensures enduring structural bonding across challenging internal and external civil construction environments.

Key Highlights

• Enhanced Flexibility & Crack Resistance: Imparts high elasticity to cementitious mortars and slurries, drastically minimizing drying shrinkage cracks and accommodating structural micro-movements.
• Superior Waterproofing Barrier: Creates an impermeable hydrophobic barrier when blended with cement in a 1:1 ratio, resisting water ingress, dampness, and hydrostatic pressure.
• High-Bond Adhesion Promoter: Significantly boosts adhesive shear and tensile bond strength to concrete, brickwork, masonry, stone, and plaster substrates.
• High Solids Content (~47%): Concentrated polymer latex formulation delivering premium efficiency, durability, and mechanical performance at economical dosages.
• Multi-Functional Versatility: Functions seamlessly as a brush-applied waterproofing membrane, a slurry bonding bridge for cold joints, an admixture for repair mortars, and a modifier for tile adhesives.
• Superior Chemical & Environmental Resistance: Resistant to water, mild acids, alkalis, and atmospheric carbonation across an application temperature range of +5°C to +35°C.
• Extended Pot Life: Workable pot life of 2 to 4 hours, facilitating smooth, continuous application across large-scale commercial and residential projects.

Technical Specifications

Parameter / Property	Specification / Value
Product Name	MARMOLATEX-SBR47
Chemical Base	Styrene-Butadiene Rubber (SBR) copolymer latex emulsion
Physical Appearance	Milky white liquid
Density / Specific Gravity	~1.02 g/cm³
pH Value	9.0 – 11.0 (Alkaline)
Solid Content	~47%
Application Temperature	+5°C to +35°C
Water Resistance	Excellent (impermeable barrier in 1:1 cement slurry)
Flexibility	Significantly improved in modified mortars and slurries
Pot Life	2 – 4 hours (depending on ambient temperature)
Curing Time	Minimum 24 – 48 hours before heavy use or loading
Standard Packaging	1 Litre, 5 Litres, and 20 Litres containers
Shelf Life	6 months in original, unopened packaging
Storage Temperature Range	Store in a cool, dry place away from moisture and direct sunlight

Application & Handling

1. Surface Preparation The substrate must be structurally sound, clean, and free of dust, oils, grease, curing compounds, laitance, algae, efflorescence, and loose friable particles. Clean the concrete or masonry surface thoroughly using high-pressure water washing or wire brushing. Crucial Step (Pre-Wetting): Slightly dampen the substrate with clean potable water to achieve a Saturated Surface Dry (SSD) condition before applying MARMOLATEX-SBR47 slurries or modified mortars. Do NOT apply on completely dry substrates or leave standing pools of water.

2. Mixing & Proportioning Instructions

a. For Waterproofing Slurry Coating: Mix MARMOLATEX-SBR47 with fresh Portland cement in a 1:1 ratio by weight (1 kg latex to 1 kg cement). Blend thoroughly using a low-speed mechanical stirrer (300–400 RPM) for 3 minutes until a creamy, lump-free slurry is formed. Apply in two coats using a stiff nylon brush or roller at right angles (perpendicular) to each other. Allow 4 to 6 hours between coats.

b. For Mortar Admixture (Repair Mortars, Plasters & Screeds): Use MARMOLATEX-SBR47 to replace a portion of the gauging water. Recommended dosing: Mix 300 ml of MARMOLATEX-SBR47 to 2 parts clean water (or as specified for custom screed mixes). Blend dry sand and cement (typically 1:3 or 1:4 ratio), then add the pre-diluted latex liquid gradually while mixing until a homogeneous, workable mortar consistency is achieved.

c. For Bonding Bridge Slurry (Old to New Concrete): Mix MARMOLATEX-SBR47 with cement in a 1:1 ratio by weight to create a fluid bond coat. Apply onto the prepared damp substrate, and place fresh concrete/mortar while the slurry bridge remains wet and tacky (wet-on-wet).

3. Curing Schedule Allow the applied waterproofing slurry or modified mortar to cure for at least 24 to 48 hours. Protect newly applied surfaces from direct intense sunlight, desiccating dry winds, rain, and freezing conditions during the initial curing period. For exterior cementitious mortars, perform light water mist curing after 24 hours to ensure optimum cement hydration.

Operational Directives

Do’s

• Ensure the substrate is clean, sound, and free from contaminants before application.
• Pre-dampen absorbent substrates to SSD condition prior to application.
• Use a mechanical mixer at low speed to obtain a smooth, homogeneous, lump-free mix.
• Apply waterproofing slurries in two perpendicular coats for complete coverage.
• Allow 24 to 48 hours of curing before subjecting the surface to water testing or heavy loading.
• Tightly reseal containers immediately after dispensing.

Don’ts

• Do NOT apply on dirty, dusty, oily, or crumbly substrates.
• Do NOT apply the mixture onto completely dry, un-dampened substrates.
• Do NOT use neat latex without proper proportioning with cement or water.
• Do NOT over-mix mortars at high speeds, which can entrap excess air.
• Do NOT apply in ambient temperatures below +5°C or exceeding +35°C.
• Do NOT subject waterproofing coats to ponding water tests before the 48-hour cure window.

Storage & Safety

Storage: Store in a cool, dry place away from moisture and frost. Protect containers from direct solar radiation.

Handling: Wear chemical-resistant gloves, protective clothing, and safety goggles during handling and mixing. Ensure adequate ventilation in enclosed spaces.

First aid:

• Skin Contact: Wash thoroughly with soap and clean water. If irritation persists, seek medical advice.
• Eye Contact: Rinse eyes immediately with copious clean water for at least 15 minutes. Consult a physician.
• Inhalation: Move person to fresh air immediately. Seek medical assistance if breathing difficulties occur.
• Ingestion: Do not induce vomiting. Rinse mouth with clean water and seek medical assistance immediately.
• Disposal: Dispose of unused contents and containers in accordance with local environmental regulations. Do not discharge into open waterways or sewage systems.

Frequently Asked Questions

What is MARMOLATEX-SBR47?
MARMOLATEX-SBR47 is a versatile styrene-butadiene copolymer latex (47% solids content) designed as an admixture for cement mortars and as a binder for flexible waterproofing slurries.

What does the "SBR47" designation signify?
It designates Styrene-Butadiene Rubber (SBR) chemistry with an active polymer solid content of approximately 47%, delivering high concentration and superior bonding efficiency.

How is MARMOLATEX-SBR47 used for waterproofing?
It is blended with ordinary Portland cement in a 1:1 ratio by weight to create a brush-applied, elastomeric, waterproof slurry membrane.

Why is MARMOLATEX-SBR47 added to cement mortars?
It replaces part of the mixing water to significantly boost mortar tensile strength, flexibility, adhesion, and resistance to cracking, frost, and water penetration.

Can MARMOLATEX-SBR47 be used as a bonding bridge between old and new concrete?
Yes. A 1:1 slurry of MARMOLATEX-SBR47 and cement acts as a high-strength bonding bridge applied wet-on-wet before placing fresh concrete or screed.

Why must the substrate be dampened before application?
Pre-dampening to a Saturated Surface Dry (SSD) condition prevents a dry, thirsty substrate from prematurely sucking moisture out of the slurry, ensuring proper cement hydration and bond strength.

How many coats of waterproofing slurry should be applied?
Two coats are recommended. The second coat should be applied perpendicular (at right angles) to the first once the first coat is touch dry (approx. 4–6 hours).

What is the pot life of MARMOLATEX-SBR47 mixtures?
The mixed slurry or modified mortar has a workable pot life of 2 to 4 hours depending on ambient temperature and humidity.

What is the curing time required before heavy use?
Curing requires a minimum of 24 to 48 hours before subjecting the treated surface to heavy traffic, foot traffic, or subsequent plaster layers.

Can MARMOLATEX-SBR47 be used with tile adhesives?
Yes. Adding MARMOLATEX-SBR47 to standard cementitious tile adhesives improves deformability, shear bond strength, and slip resistance.

Does MARMOLATEX-SBR47 improve chemical resistance?
Yes. By tightening the capillary structure and reducing permeability, it significantly enhances mortar resistance to mild acids, alkalis, salts, and sewage gases.

Can it be applied in outdoor weather conditions?
Yes. It features high weather stability and resistance to thermal shocks and freeze-thaw cycles, making it ideal for exterior terraces, facades, and balconies.

What is the density and pH of MARMOLATEX-SBR47?
It has a liquid density of ~1.02 g/cm³ and an alkaline pH between 9.0 and 11.0, making it chemically compatible with cement matrices.

What tools are recommended for application?
For waterproofing slurries, use a masonry paintbrush, roller, or hopper gun. For modified mortars, use standard trowels and straightedges.

What is the dilution ratio when using it as a mortar admixture?
Typically, replace a portion of the gauging water by mixing 300 ml of MARMOLATEX-SBR47 with 2 parts clean water.

What is the shelf life of MARMOLATEX-SBR47?
It maintains a shelf life of 6 months in original, unopened packaging stored under dry, shaded conditions between +5°C and +35°C.

What container sizes are available?
It is supplied in 1 Litre, 5 Litres, and 20 Litres containers.

Can MARMOLATEX-SBR47 be applied on painted or glazed surfaces?
No. Painted, oil-soaked, or glazed surfaces must be mechanically prepared (scabbled, grit-blasted, or ground) to expose clean concrete before application.

What personal protective equipment (PPE) should be worn?
Wear protective waterproof gloves, safety goggles, and suitable workwear. Maintain adequate ventilation during mixing and application.