4 mm –25°C SBS Modified Bituminous Membrane
Introduction
Choosing the right product in waterproofing applications is essential for the safety, durability, and service life of a structure. Especially in regions with severe winter conditions, waterproofing materials must be able to maintain their flexibility at low temperatures without losing performance.
The 4 mm –25°C SBS modified bituminous membrane provides reliable performance even under the harshest climate conditions thanks to its ability to remain flexible down to –25°C and its ideal thickness.
What is a 4 mm –25°C SBS Modified Bituminous Membrane?
This membrane is a bitumen-based waterproofing product modified with Styrene-Butadiene-Styrene (SBS). The SBS additive reduces the risk of hardening and cracking at low temperatures, allowing the material to maintain its flexibility. Its –25°C cold flexibility rating makes it suitable for the coldest regions and severe climate conditions.
The 4 mm thickness provides strong protection against punctures, tears, and mechanical impacts.
Technical Specifications
Thickness: 4 mm
Cold Flexibility: –25°C
Modification Type: SBS (Styrene-Butadiene-Styrene)
Reinforcement Layer: Polyester felt (high tensile strength)
Top Surface: Polyethylene film, sand coating, or mineral coating
Application Method: Torch-applied installation
Applications
Bridges and Viaducts: Reduces the risk of cracking on moving surfaces.
Cold Climate Regions: Maintains flexibility down to –25°C.
Foundation Waterproofing: Provides resistance against groundwater and soil pressure.
Roofs and Terraces: Suitable for areas requiring resistance against snow loads and low temperatures.
Parking Roofs and Industrial Areas: Preferred for applications requiring high mechanical strength.
Advantages
Superior Cold Resistance: Maintains flexibility down to –25°C.
High Mechanical Resistance: The 4 mm thickness provides strong protection against punctures and tears.
Long Service Life: Provides 15–20 years of performance with proper installation.
Adaptability to Harsh Climates: Can be safely used in bridges, viaducts, and high-altitude regions.
Wide Application Range: Suitable for various applications from roofs and foundations to infrastructure and industrial projects.
Application Recommendations
Surface Preparation: The application surface must be clean, dry, and smooth.
Primer Application: Bituminous primer improves adhesion performance.
Overlap Details: Minimum 10 cm overlap should be applied at joints.
Protective Layer: For foundation applications, protective concrete or drainage boards should be used.
Frequently Asked Questions (FAQ)
Where is the 4 mm –25°C SBS modified bituminous membrane preferred?
It is used in regions with severe winter conditions, especially for bridges, viaducts, foundations, roofs, and terrace applications.
What does –25°C cold flexibility mean?
It means the membrane can maintain its flexibility without cracking at temperatures down to –25°C.
What is the difference between the 4 mm –20°C and 4 mm –25°C products?
The –25°C version provides higher resistance against lower temperatures and is designed for more extreme climate conditions.
What is the average service life?
Under suitable application conditions, it can provide reliable performance for approximately 15–20 years.