MARMOFLEX-S1

Marmoflex-S1 by Marmo Solutions is a high-performance, cement-based, polymer-modified adhesive engineered for demanding tile and natural stone installations across interior and exterior environments. Certified under EN 12004 (C2TES1), IS 15477:2019 (Type 4TS1 / 4T), and ANSI A118.15 standards, this deformable adhesive delivers high bond strength, enhanced flexibility, extended open time, and non-slip vertical hold. It is specifically formulated for environments that experience thermal and mechanical stresses or minor substrate movement, such as heated floor screeds (underfloor heating), balconies, terraces, and exterior facades.

Engineered with an S1 deformability rating (≥ 2.5 mm up to 5.0 mm), Marmoflex-S1 accommodates substrate deflection and thermal expansion without loss of adhesion or debonding. It is suitable for medium to large-format ceramic, porcelain, and vitrified tiles, as well as dense natural stones such as marble and granite up to 20 mm thickness. Formulated with high resistance to water immersion, freeze-thaw cycles, and vertical slippage (≤ 0.5 mm), Marmoflex-S1 guarantees durable, long-term installations on both walls and floors in residential, commercial, and wet areas.

Key Highlights

• S1 Deformability & Flexibility: Deformability rating of ≥ 2.5 mm up to 5.0 mm absorbs structural movement, vibrations, and thermal shocks from underfloor heating and weather variations.
• Triple Standard Compliance: Officially classified under EN 12004 (C2TES1), IS 15477:2019 (Type 4TS1 / 4T), and ANSI A118.15.
• Non-Slip Thixotropic Formula: Restricts vertical slip to ≤ 0.5 mm, preventing tile sagging and slippage on vertical walls and facades.
• Extended Open Time & Workability: Provides an open time of ≥ 30 minutes and adjustability window up to 40 minutes for effortless handling and precision alignment.
• Water, Heat & Freeze-Thaw Resistance: Engineered to withstand wet areas (bathrooms, kitchens), severe temperature fluctuations, and cold-climate freeze-thaw cycles.
• High Structural Bond Strength: Delivers dry tensile adhesion ≥ 1.5 N/mm² and shear adhesion ≥ 1.5 N/mm² under dry, wet, and heat-aged conditions.
• Versatile Substrate Application: Adheres firmly to properly cured cement screeds, concrete bases, plaster, balconies, terraces, and facades.

Technical Specifications

Property	Specification / Value
Product Classification	EN 12004: C2TES1 | IS 15477:2019: 4TS1 (Type-4T) | ANSI A118.15
Component Type	Cement-based, polymer-modified
Color	Grey or White
Packaging Sizes	20 KG and 50 KG bags
Water Mixing Ratio	Approx. 4.5 to 5.0 Litres of clean (≤ 200 TDS) water per 20 KG bag
Pot Life	4 to 5 hours at 25°C
Open Time	≥ 30 minutes
Adjustability Time	≥ 30 minutes (up to 40 minutes)
Application Temperature	+5°C to +35°C
Slip Resistance	≤ 0.5 mm
Tensile Adhesion (Dry Condition)	≥ 1.5 N/mm²
Tensile Adhesion (Wet Condition)	≥ 1.0 N/mm²
Shear Adhesion (Dry Condition)	≥ 1.5 N/mm²
Shear Adhesion (Heat Ageing)	≥ 1.0 N/mm²
Shear Adhesion (Wet Condition)	≥ 1.0 N/mm²
Deformability (S1)	≥ 2.5 mm up to 5.0 mm
Stone Thickness Capability	Suitable for stones up to 20 mm thickness
Coverage	1.3 kg/m² per mm thickness (approx. 4 to 6 kg/m² depending on tile size, notch depth, and substrate profile)
Shelf Life	12 months in original unopened packaging stored below 25°C in dry conditions

Application & Handling

1. Surface Preparation Ensure the substrate is structurally sound, clean, dry, and free of dust, oil, grease, wax, curing compounds, or loose particles. Level uneven surfaces before installation. Pre-dampen absorbent substrates before applying Marmoflex-S1, taking care to avoid standing water.

2. Mixing Instructions Add approximately 4.5 to 5.0 liters of clean, potable water (≤ 200 TDS) to a clean mixing container for every 20 KG bag of Marmoflex-S1. Mix using a slow-speed mechanical stirrer until a smooth, lump-free, homogenous consistency is achieved. Allow the mixture to rest/slake for 5 minutes, then re-stir before use. Do not add excess water, cement, lime, sand, or foreign additives.

3. Application Method Spread adhesive with the flat edge of a notched trowel, then comb in straight parallel ridges. Press tiles firmly into the adhesive bed within the 30-minute open time to ensure complete contact. For large-format tiles, heavy natural stone, or exterior facades, use the back-buttering technique to ensure 100% full bedding. Adjust tiles within 30 to 40 minutes.

4. Movement Joints & Grouting Provide movement joints at 3–5 m intervals in interior areas and 2–3 m intervals in exterior areas; never bridge structural expansion joints. Allow at least 24 hours of curing time before grouting joints or permitting foot traffic.

Frequently Asked Questions

What is MARMOFLEX-S1?
MARMOFLEX-S1 is a high-performance, cement-based, polymer-modified deformable adhesive engineered for installing ceramic, porcelain, vitrified, and natural stone tiles on interior and exterior walls and floors.

What classifications and standards does MARMOFLEX-S1 meet?
It complies with EN 12004 (C2TES1), IS 15477:2019 (Type 4TS1 / 4T), and ANSI A118.15 standards.

What does "C2TES1" mean?
"C2" denotes an improved cementitious adhesive, "T" signifies slip resistance, "E" stands for extended open time, and "S1" indicates deformable flexibility (≥ 2.5 mm).

What is the deformability of MARMOFLEX-S1?
It has an S1 deformability of ≥ 2.5 mm up to 5.0 mm, allowing it to absorb structural stress, thermal expansion, and substrate deflection.

Is MARMOFLEX-S1 suitable for underfloor heating systems?
Yes, its thermal stability and S1 deformability make it ideal for heated floor screeds that expand and contract.

Can MARMOFLEX-S1 be used on exterior facades and balconies?
Yes, it is designed for demanding outdoor areas subjected to weathering and thermal movement, including balconies, terraces, and facades.

What stone thickness can MARMOFLEX-S1 support?
It can safely install natural stone slabs up to 20 mm in thickness.

What is the mixing ratio for MARMOFLEX-S1?
Mix approximately 4.5 to 5.0 liters of clean potable water (≤ 200 TDS) per 20 KG bag of adhesive.

What is the pot life of the mixed adhesive?
At 25°C, MARMOFLEX-S1 provides a workable pot life of 4 to 5 hours.

What is the open time and adjustability time?
It provides an open time of ≥ 30 minutes and an adjustability window of 30 to 40 minutes.

What is the vertical slip resistance rating?
It has a slip resistance of ≤ 0.5 mm, preventing heavy wall cladding and tiles from sliding during vertical installation.

What are its tensile and shear adhesion values?
Dry tensile adhesion is ≥ 1.5 N/mm² (wet ≥ 1.0 N/mm²), and shear adhesion is ≥ 1.5 N/mm² (wet/heat-aged ≥ 1.0 N/mm²).

Is MARMOFLEX-S1 resistant to freeze-thaw cycles?
Yes, it is formulated to resist repeated freeze-thaw cycles in cold outdoor climates without loss of adhesion.

Is back-buttering required?
Yes, back-buttering is required for large-format tiles, heavy natural stone, and exterior facades to eliminate voids and guarantee 100% bed contact.

What are the spacing recommendations for movement joints?
Movement joints should be installed at 3–5 meter intervals in interior areas and 2–3 meter intervals in exterior areas.

How long should I wait before grouting or foot traffic?
Allow a minimum curing time of 24 hours before grouting tile joints or opening the area to light foot traffic.

What colors and packaging sizes are available?
It is available in Grey and White powders in 20 KG and 50 KG bags.

Can MARMOFLEX-S1 bridge active structural cracks?
No, active cracks wider than 0.5 mm require proper crack isolation treatment before tile installation, and structural expansion joints must never be bridged.

What is the shelf life and proper storage condition?
It has a shelf life of 12 months in unopened original packaging when stored in a cool, dry place below 25°C.