MARMOFLEX-SLURRYBOND

MARMOFLEX SLURRYBOND (also known as Marmoslurry-Bond) is a high-performance, cement-based polymer-modified slurry adhesive engineered specifically for the traditional wet-on-wet installation of marble slabs, ceramic tiles, porcelain vitrified tiles, and natural stone onto freshly laid screeds or cement-sand mortar beds. Classified as C2E under EN 12004 and Type 2T under IS 15477:2019, this advanced bonding slurry bridges the physical and mechanical interface between the semi-dry screed bed and the stone/tile backing. It provides superior adhesion, deformability, extended open time ($ge 30$ minutes), and exceptional water and heat resistance, eliminating hollow sounds, debonding, and shrinkage cracking in high-speed, large-scale commercial and residential floor installations.

Key Highlights

• Polymer-Modified Cementitious Matrix: Delivers enhanced tensile adhesion and deformability, accommodating differential thermal expansion between stone and screed.
• Dual Standard Compliance: Meets and exceeds EN 12004 Class C2E (improved cementitious adhesive with extended open time) and IS 15477:2019 Type 2T.
• Wet-on-Wet Application Advantage: Pours directly onto freshly leveled mortar or screed beds, forming a monolithic bond that accelerates installation speed while ensuring 100% bedding contact.
• Extended Open & Adjustability Time: Provides $ge 30$ minutes of open time and up to 30 minutes of adjustability, facilitating precision alignment of heavy slabs and large-format porcelain tiles.
• High Environmental Resilience: Maintains $ge 1.0text{ N/mm}^2$ bond strength across initial curing, continuous water immersion, heat aging, and freeze-thaw cycles.
• Heavy Load & High Shear Durability: Formulated to withstand heavy dynamic vehicular and pedestrian loading, making it suitable for shopping malls, airports, public plazas, and luxury residences.
• Available in Grey and White: White variant prevents discoloration and bleed-through when installing translucent white marbles such as Statuario, Thassos, and Carrara.

Technical Specifications

Parameter / Property	Specification / Value
Product Name	MARMOFLEX SLURRYBOND (Marmoslurry-Bond)
Product Classification	C2E (EN 12004) and Type 2T (IS 15477:2019)
Material Formulation	Cement-based, polymer-modified bonding slurry adhesive
Color Availability	Grey and White
Mixing Water Ratio	Approx. 9.0 – 10.0 Litres of clean water per 20 KG bag
Open Time	$ge 30$ minutes
Adjustability Time	Up to 30 minutes
Pot Life	4 – 5 hours at 25°C
Initial Tensile Bond Strength (28 Days)	$ge 1.0text{ N/mm}^2$
Bond Strength after Water Immersion	$ge 1.0text{ N/mm}^2$
Bond Strength after Heat Aging	$ge 1.0text{ N/mm}^2$
Bond Strength after Freeze-Thaw Cycles	$ge 1.0text{ N/mm}^2$
Coverage Rate	$1.3text{ kg/m}^2$ per mm thickness (approx. 4 – 6 $text{kg/m}^2$ depending on tile format & bed)
Application Trowel Notch	3 mm notched trowel
Initial Setting / Light Foot Traffic	24 hours
Full Mechanical Cure / Heavy Loading	7 days
Standard Packaging	20 KG heavy-duty moisture-resistant bags
Shelf Life	12 months in unopened, original packaging
Storage Conditions	Store in a cool, dry place off the ground, away from direct sunlight

Application & Handling

1. Substrate Preparation Clean the structural RCC slab or concrete base thoroughly, removing all dust, grease, curing compounds, laitance, oil, and loose debris. Apply a bonding slurry coat of Marmobond-Coat onto the cleaned concrete slab to enhance monolithic adhesion between the structural concrete and the new mortar bed.

2. Mortar Bed Preparation Prepare a fresh, workable semi-dry mortar mix using a 1:4 ratio of cement to graded sand, or use a pre-mixed engineered screed mortar (Marmoscreed). Spread and compact the fresh mortar evenly across the Marmobond-Coat treated base using a straightedge or screed bar. Level the mortar bed to the specified elevation and thickness, ensuring a smooth, uniform bedding plane.

3. Mixing MARMOFLEX SLURRYBOND Measure approximately 9.0 to 10.0 litres of clean potable water into a clean mixing container. Gradually add the entire 20 KG bag of MARMOFLEX SLURRYBOND powder while continuously stirring. Mix thoroughly for 3 to 5 minutes using a slow-speed mechanical stirrer (300–400 RPM) until a completely lump-free, fluid, creamy slurry consistency is achieved. Allow the slurry to slake for 2 to 3 minutes, then re-stir briefly before application.

4. Wet-on-Wet Slurry Application Pour the freshly mixed MARMOFLEX SLURRYBOND directly over the fresh, un-set mortar bed (wet-on-wet technique). Spread the slurry uniformly across the mortar bed using a 3 mm notched trowel to ensure 100% continuous coverage without dry spots.

5. Tile & Stone Installation Place tiles or marble slabs firmly into position onto the wet slurry bed while both slurry and mortar remain fully receptive. Tap and bed the stones/tiles thoroughly using a rubber mallet or mechanical tile vibrator to eliminate air voids and achieve complete bed transfer. Back-Buttering: For large-format porcelain slabs, heavy granite, or marble, apply a thin buttering coat of MARMOFLEX SLURRYBOND to the back of each piece prior to setting. Align and level the tiles immediately; final alignment adjustments can be made within the 30-minute adjustability window.

6. Curing & Grouting Schedule Protect the installed floor from disturbance and allow to cure for at least 24 hours before permitting light foot traffic. Grouting can be carried out after 24 hours using MARMOFLEX-GROUT or MARMOPOXY GROUT. Allow 7 full days of curing before subjecting the flooring to heavy vehicular loading or commercial equipment.

Do’s

• Ensure the underlying concrete slab is clean and sound before screed placement.
• Prepare a fresh 1:4 cement-sand mortar or ready-mix Marmoscreed.
• Use a mechanical mixer to ensure a smooth, homogeneous, lump-free slurry.
• Apply using the wet-on-wet method over fresh mortar bed.
• Spread slurry evenly with a 3 mm notched trowel.
• Bed tiles using a rubber mallet or vibrating tool while slurry is wet.
• Back-butter large-format tiles and marble slabs.
• Allow 24 hours before light foot traffic and 7 days before heavy loading.

Don’ts

• Do NOT apply on dusty, oily, or contaminated concrete surfaces.
• Do NOT install tiles once the slurry has skinned over, dried, or lost tackiness.
• Do NOT apply excessively thick layers of slurry beyond recommendations.
• Do NOT add excess water beyond 10 litres per bag (causes segregation and strength reduction).
• Do NOT expose fresh installations to water, frost, or heavy traffic during initial 24 hours.
• Do NOT store bags in damp environments or in direct sunlight.
• Do NOT use material from damaged, torn, or previously opened bags.

Storage & Safety

Storage: Store sealed in original bags in a dry, cool, covered warehouse off the ground on wooden pallets. Protect from rain, moisture, and frost.

Handling: Wear chemical-resistant gloves, safety goggles, protective clothing, and an approved dust mask during mixing.

First aid:

• Skin Contact: Wash thoroughly with clean water and mild soap.
• Eye Contact: Rinse eyes immediately with plenty of water for at least 15 minutes and seek medical advice.
• Inhalation: Move to fresh air immediately. Seek medical attention if breathing issues develop.
• Disposal: Dispose of packaging and cementitious waste in accordance with regional environmental regulations.

Frequently Asked Questions

What is MARMOFLEX SLURRYBOND?
MARMOFLEX SLURRYBOND is a polymer-modified cementitious bonding slurry designed for installing marble, tiles, and natural stone over fresh mortar beds using the traditional wet-on-wet method.

What does "wet-on-wet" application mean?
Wet-on-wet means the bonding slurry is poured and combed directly over a freshly laid, wet cement-sand mortar screed, and tiles are set immediately while both layers are wet, creating a monolithic structure.

What standards and classifications does MARMOFLEX SLURRYBOND meet?
It complies with European Standard EN 12004 Class C2E (improved cementitious adhesive with extended open time) and Indian Standard IS 15477:2019 Type 2T.

What is the water mixing ratio for a 20 KG bag?
Mix one 20 KG bag with approximately 9.0 to 10.0 litres of clean potable water.

Can MARMOFLEX SLURRYBOND be used for large-format tiles and marble slabs?
Yes. Its high shear strength and extended open time make it ideal for large-format tiles, granite, and marble slabs. Back-buttering each slab is recommended.

Why should I choose MARMOFLEX SLURRYBOND over plain cement slurry?
Plain cement slurry shrinks significantly, becomes brittle, and debonds under thermal movement or heavy loads. MARMOFLEX SLURRYBOND contains redispersible polymers that provide flexibility, crack resistance, and double the bond strength.

What is the pot life and open time of MARMOFLEX SLURRYBOND?
It has a pot life of 4 to 5 hours at 25°C, an open time of $ge 30$ minutes, and an adjustability window of up to 30 minutes.

What coverage can be expected from a 20 KG bag?
Coverage is approximately $1.3text{ kg/m}^2$ per mm thickness, yielding about 4 to 6 $text{kg/m}^2$ depending on tile size, back profile, and substrate leveling.

Which trowel size is recommended for applying the slurry?
A 3 mm notched trowel is recommended to ensure complete, uniform slurry coverage across the mortar bed.

When can the tiled floor be walked upon?
Light foot traffic is allowed after 24 hours of curing. Full mechanical curing for heavy commercial traffic requires 7 days.

Is MARMOFLEX SLURRYBOND suitable for wet areas like bathrooms and kitchens?
Yes. It provides excellent water resistance and maintains a tensile bond strength of $ge 1.0text{ N/mm}^2$ after continuous water immersion.

Can it be used for exterior stone installations?
Yes. It is engineered to withstand heat aging, thermal movement, and freeze-thaw weathering, making it suitable for outdoor terraces, courtyards, and plazas.

Is MARMOFLEX SLURRYBOND available in white color?
Yes. It is available in both Grey and White. The White version is specifically recommended for light and translucent marbles (like Statuario and Thassos) to prevent shading.

What is the function of Marmobond-Coat in the system?
Marmobond-Coat is applied to the structural concrete slab prior to screeding to bridge old concrete with the fresh mortar screed.

What is the tensile adhesion strength of the product?
It achieves a high tensile adhesion bond strength of $ge 1.0text{ N/mm}^2$ under initial conditions, water immersion, heat aging, and freeze-thaw cycles after 28 days.

Can I remix or add extra water if the slurry starts to stiffen in the bucket?
No. Never add extra water or re-temper setting slurry. Mix only what can be consumed within its open working window.

Why is tile vibration or mallet tapping necessary?
Tapping with a rubber mallet or vibrating tool collapses the slurry ridges, ensuring 100% solid surface contact and eliminating hollow pockets under the tiles.

Can MARMOFLEX SLURRYBOND be used on dry, fully cured screeds?
For pre-cured, dry screeds, standard thin-bed or thick-bed polymer tile adhesives (such as Marmoflex, Marmoflex-V, or Marmoflex-T) should be used instead.

What is the shelf life and packaging of MARMOFLEX SLURRYBOND?
It is packaged in 20 KG moisture-resistant bags with a shelf life of 12 months when stored in dry, covered conditions.