Insulated Smart Self-Levelling Screed
Fire Barrier F360 Class
THERMOLOCK Insulated Smart Screed (CS4) is a high-performance floor screed that provides thermal, acoustic, and fire insulation. With a dry density of 800–1000 kg/m3, it is specially designed for applications requiring high mechanical strength. It adheres directly to concrete surfaces without the need for primer or adhesive, ensuring easy application and long-term durability.
Unlike conventional screeds, it provides high sound insulation, allowing both floor leveling and sound insulation to be achieved with a single product between floors.
Advantages
Fire resistance ≤ 360 minutes
CE-certified
High thermal insulation
Easy application
High compression strength
High acoustic insulation
Application
1. The substrate should be clean, free of dust, oil, and weak particles.
2. Mix 25 kg powder with approximately 12,5 > 13 liters of clean water using a low-speed mixer.
3. Mixing 6 minutes until a homogeneous mixture is obtained.
4. Allow the mixture to rest for 2-3 minutes for better water integration.
5. Apply manually with a trowel or by machine spraying.
6. Ensure a minimum thickness of 2 cm.
7. Ceramic, stone, granite coatings can be applied after 48 hours.
8. For multilayer applications, allow the first layer to dry before applying the next.
Areas of Application
– Any surface where regular screed is used
– Any type of structure requiring insulation
– Commercial buildings, hotels and skyscrapers
– Storage and industrial areas
– The inner surfaces of the houses
– Spaces needing heat and acoustic insulation
Sound Insulation Performance
• Impact sound reduction (ΔLw): 56 dB (5 cm thickness)
• Contribution to airborne sound insulation: +4 to +6 dB
• Effective frequency absorption: 100 Hz – 5,000 Hz
• Particularly effective in the 250–1,000 Hz range (speech frequencies)
• Airborne sound improvement: 2–4 dB depending on the floor system
• Effective frequency range: 125 Hz to 4000 Hz
• Sound test procedures compliant with ISO 10140 to be planned.
Drying Characteristics and Moisture Content
Initial set: 7 hours
Walkable: after 24 hours (light duty use)
Moisture content: after 24 hours 15%
Complete drying: 72 hours under standard conditions (23 C / 50% RH)
Drying speed depends on ambient temperature and ventilation.
Avoid application below +5 C or above +35 C
Traffic Readiness
Light foot traffic: 24 hours
Heavy loads or coatings: 72 hours
Primer Usage and Bond Performance
Primer is not required for standard applications. However, if higher bond strength is desired,
it can be increased through the use of a suitable primer. The table below shows a comparative overview:
| Surface Type / Application | Bond Strength Without Primer | Bond Strength With Primer |
|---|---|---|
| Standard Concrete Surface | > 2.0 MPa | > 2.5 MPa |
| Rough / Absorbent Surface | > 1.8 MPa | > 2.4 MPa |
| Special Areas Requiring High Adhesion | > 2.0 MPa | > 3.0 MPa |
Storage
– Store in a dry, closed place on pallets.
– Do not stack more than 10 bags.
– When stored this way, it has a shelf life of 16 months.
Safety
Avoid contact with skin and eyes
– Wear protective gloves and goggles during application.
– Non-flammable and non-toxic. Classified as a non-hazardous cement-based material.
– For detailed health information, please refer to the MSDS document.
Technical Specifications
| Property | Value |
|---|---|
| Color | Grey |
| Binder | Special cementitious formulation |
| Density (Bulk) | 900 ± 10% kg/m³ |
| Thermal Conductivity (λ) | 1.0 W/m·K (±10%) |
| Fire Classification | A1 Non-Combustible (EN 13501-1) |
| Fire Resistance | F360 (360 minutes) – up to 1000 °C |
| Sound Insulation | Up to 56 dB (depending on system) |
| Water Vapor Permeability | High (breathable) |
| Water Resistance | 0.250 kg/m²·min⁰·⁵ (W1) |
| Compressive Strength | CS IIII (≥ 4.0 N/mm²) |
| Adhesion Strength | ≥ 2.0 N/mm² |
| Workability Time | 120 minutes |
| Drying Time | 24–48 hours (depending on layer thickness) |
| Mixing Water Requirement | 13–14 L per 25 kg bag |
| Application Thickness | 20–30 mm (per layer) |
| Consumption | 6.0–6.3 kg/m² per 10 mm layer |
| Shelf Life | 16 months in dry conditions |
| Application Temperature Range | +5 °C to +35 °C |
| Application Type | Machine or steel trowel |
| Packaging Type | 25 kg |