10/07/2026
Waterproofing is one of the most important durability challenges for buildings, especially in regions dominated by low temperatures. Freezing conditions, snow loads, heavy rainfall, and sudden temperature changes can cause cracks and deformation in waterproofing materials. Therefore, maintaining flexibility in cold weather is a critical performance requirement.
The 3 mm –15°C SBS modified bituminous membrane provides long-lasting and reliable waterproofing performance by maintaining its elastic structure at low temperatures thanks to its thickness and SBS modification.
What is a 3 mm –15°C SBS Modified Bituminous Membrane?
This product is a bitumen-based waterproofing membrane modified with Styrene-Butadiene-Styrene (SBS). The SBS additive prevents the material from becoming brittle at low temperatures and helps maintain its flexibility. Thanks to its –15°C cold flexibility rating, it can be safely used in regions where freezing conditions occur.
The 3 mm thickness provides a balanced performance between mechanical strength and flexibility.
Technical Specifications
Thickness: 3 mm
Cold Flexibility: –15°C
Modification Type: SBS (Styrene-Butadiene-Styrene)
Reinforcement Layer: Polyester felt (high tensile and tear resistance)
Top Surface: Polyethylene film, sand coating, or mineral coating
Application Method: Torch-applied installation
Applications
Cold Climate Regions: Suitable for areas exposed to freezing conditions and heavy snow loads.
Terraces and Roofs: Provides long-lasting and reliable waterproofing solutions.
Intermediate Layer Waterproofing: Prevents water penetration between building floors.
Prefabricated and Industrial Buildings: Suitable for projects requiring durability and flexibility.
Pitched Roofs: Minimizes the risk of cracking during cold weather conditions.
Advantages
Cold Weather Resistance: Maintains elasticity down to –15°C.
Mechanical Strength: The 3 mm thickness provides protection against punctures and tears.
Long Service Life: Provides reliable performance for many years when properly installed.
Wide Range of Applications: Suitable for both residential and industrial buildings.
Easy Installation: Enables fast and secure installation with the torch application method.
Application Recommendations
Surface Preparation: The application surface must be clean, dry, and smooth.
Primer Application: Using a bituminous primer improves adhesion performance.
Overlap Details: Minimum 10 cm overlap should be applied at joints.
Protection Layer: For exposed applications, mineral-coated products should be preferred.
Frequently Asked Questions (FAQ)
Where is the 3 mm –15°C SBS modified bituminous membrane used?
It is preferred in cold regions with freezing risks, as well as roof and terrace waterproofing applications.
What is the difference compared to APP modified products?
SBS modified membranes provide higher flexibility at low temperatures and offer safer performance in cold climates.
Can it be used for foundation waterproofing?
It can be used for above-ground foundation applications; however, for underground applications, membranes with a thickness of 4 mm or more are generally recommended.
What is the average service life?
With proper installation and protection conditions, it can provide reliable performance for approximately 12–15 years.
