10/07/2026
Choosing the right product in waterproofing applications not only prevents water leakage but also plays a critical role in the durability and service life of the structure. In projects where heavy loads, high water pressure, and harsh climatic conditions occur together, standard thickness membranes may not provide sufficient performance.
The 5 mm –25°C SBS modified bituminous membrane is a premium waterproofing solution developed for demanding conditions with its extra-thick structure and ability to maintain flexibility at very low temperatures.
What Is 5 mm –25°C SBS Modified Bituminous Membrane?
This membrane is manufactured using bitumen modified with Styrene-Butadiene-Styrene (SBS). The SBS additive prevents brittleness at low temperatures and helps the material maintain its elasticity.
Thanks to its –25°C cold flexibility value, it can be safely used in extremely cold climate regions. Its 5 mm thickness provides maximum protection against high water pressure, heavy mechanical loads, punctures, and tears.
Technical Specifications
Thickness: 5 mm
Cold Flexibility: –25°C
Additive Type: SBS (Styrene-Butadiene-Styrene)
Reinforcement Layer: Polyester carrier (high tensile and tear resistance)
Top Surface: Polyethylene film, sand coated, or mineral coated surface
Application Method: Torch-applied installation
Applications
Foundation Waterproofing: Suitable for areas exposed to high groundwater pressure.
Dams and Water Reservoirs: Used in structures with continuous water contact.
Bridges and Viaducts: Helps reduce the risk of cracking on moving surfaces.
Parking Areas and Industrial Facilities: Provides resistance against heavy loads and vehicle traffic.
Cold Climate Regions: Maintains flexibility down to –25°C.
Advantages
High Thickness: Its 5 mm structure provides strong resistance against punctures and tearing.
Low Temperature Resistance: Maintains flexibility even at –25°C.
Superior Mechanical Performance: Provides durability against heavy loads and pressure.
Long Service Life: Can provide up to 20 years of performance with proper installation.
Professional Solution: Suitable for infrastructure and industrial projects requiring high performance.
Application Recommendations
Surface Preparation: The application surface must be clean, dry, and smooth.
Primer Application: Bituminous primer application improves adhesion performance.
Overlap Detail: A minimum overlap of 10 cm should be applied at membrane joints.
Protection Layer: Drainage boards or protective concrete are recommended for foundation applications.
Frequently Asked Questions (FAQ)
1. Where is 5 mm –25°C SBS modified bituminous membrane used? It is preferred for foundations, dams, water reservoirs, bridges, viaducts, and areas exposed to heavy loads.
2. What is the difference between 5 mm –25°C and 4 mm –25°C membranes? The 5 mm version provides higher mechanical strength and better puncture resistance, making it more advantageous for projects with heavy loads and high water pressure.
3. What does –25°C cold flexibility mean? It means the membrane can maintain its elasticity without cracking at temperatures down to –25°C.
4. What is the service life of the product? With proper installation and suitable protection, it can provide reliable performance for 15–20 years or longer.
