SBS Modified Bitumen Waterproofing Membrane
SBS (Styrene-Butadiene-Styrene) Modified Bitumen Waterproofing Membrane is a flexible, polyester-reinforced waterproofing material designed for demanding building and civil engineering applications. Modified with SBS elastomer, the bitumen membrane offers excellent impermeability, tensile strength, elongation and flexibility across a wide temperature range.
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SBS Modified Bitumen Waterproofing Membrane
SBS (Styrene-Butadiene-Styrene) Modified Bitumen Waterproofing Membrane is a flexible, polyester-reinforced waterproofing material designed for demanding building and civil engineering applications. Modified with SBS elastomer, the bitumen membrane offers excellent impermeability, tensile strength, elongation and flexibility across a wide temperature range.
With reliable resistance to temperature variations, punctures, tearing and weather exposure, this membrane is particularly suitable for roofing waterproofing, underground structures, foundations and other applications requiring durable waterproof protection. It is primarily installed using the torch-applied hot-melt method, creating secure and reliable membrane joints.
Key Features & Benefits
Excellent Waterproofing Performance
Provides strong impermeability, helping protect building structures against water penetration and moisture intrusion.
High Tensile Strength & Elongation
The polyester reinforcement provides mechanical strength, while the SBS-modified bitumen offers flexibility to accommodate substrate shrinkage, deformation and cracking.
Wide Temperature Adaptability
Offers good resistance to both high and low temperatures, making it suitable for waterproofing applications in colder environments.
Durability & Weather Resistance
Designed with resistance to punctures, tearing, corrosion, mildew and weather exposure for demanding construction environments.
Reliable Hot-Melt Bonding
The torch-applied installation method allows membrane sheets to form reliable, durable overlaps when properly installed.
Product Specifications
SBS modified bitumen membranes are available in different performance grades, thicknesses and surface finishes to accommodate various waterproofing requirements.
| Item | Specification |
|---|---|
| Product Type | Type I / Type II |
| Width | 1,000 mm |
| Thickness | 3.0 mm / 4.0 mm |
| Length | 10 m |
| Surface Finish | PE Film / Mineral Particles (Sanded Type) |
| Reinforcement | PY Polyester Reinforcement |
| Installation Method | Torch-Applied Hot-Melt Installation |
Technical Performance
The following technical data presents the performance indicators for the two available product grades.
| Test Item | Type I | Type II |
|---|---|---|
| Heat Resistance | 90°C | 105°C |
| Flow / Dripping at Test Temperature | No flowing or dripping; deformation ≤ 2 mm | |
| Low-Temperature Flexibility | -20°C | -25°C |
| Water Impermeability (30 min) | 0.3 MPa | |
| Tensile Force (N/50 mm) | ≥ 500 | ≥ 800 |
| Elongation at Maximum Force | ≥ 30% | ≥ 40% |
| Mass Increase After Immersion (PE) | ≤ 1.0% | |
| Tensile Strength Retention After Thermal Ageing | ≥ 90% | |
| Elongation Retention After Thermal Ageing | ≥ 80% | |
| Low-Temperature Flexibility After Thermal Ageing | -15°C | -20°C |
| Mass Loss After Thermal Ageing | ≤ 0.7% | |
Note: Technical values are based on the available product data sheet. Please confirm the applicable test standard and detailed testing conditions when specifying the product for a particular project.
Applications
SBS modified bitumen waterproofing membranes are suitable for a range of building and civil engineering waterproofing applications, particularly where flexibility and reliable waterproof protection are required.
Roof Waterproofing
Suitable for roofing waterproofing systems in residential, commercial and industrial buildings.
Underground Structures
Used for waterproofing underground construction and below-grade structural applications.
Ground & Foundation Protection
Applicable to ground waterproofing and moisture-proofing works.
Swimming Pools
Can be used for external waterproofing applications of pools and swimming pools.
Installation Guidelines
The SBS modified bitumen membrane is primarily installed using the torch-applied hot-melt method. Proper surface preparation and controlled heating are essential for achieving reliable adhesion and watertight overlaps.
Step 1. Surface Preparation
Inspect the substrate to ensure it is dry, solid, smooth and clean. Check surface flatness and remove dust, debris and other contaminants before installation.
Step 2. Primer Application
Apply an asphalt-based primer using a roller or brush. The recommended application dosage in the product data sheet is approximately 0.3 kg/m².
Step 3. Torch-Applied Membrane Installation
Use a suitable heating torch to heat the underside of the membrane until the bitumen layer melts. Simultaneously, roll the upper surface with a roller to ensure proper adhesion to the prepared substrate.
Step 4. Overlapping & Joint Treatment
Lay the membrane sheets smoothly and evenly, ensuring accurate positioning. Adjacent sheets should overlap by approximately 100 mm to form continuous waterproof joints.
Step 5. Inspection & Water Testing
After completing the waterproofing layer, allow 24 hours before conducting a water ponding test. Proceed with subsequent construction work only after confirming that there is no water leakage.
Construction Precautions
- Do not carry out installation during rainy or snowy weather, or when wind speeds exceed Level 5.
- The ambient construction temperature should not be lower than 0°C.
- If rain occurs during construction, take appropriate protective measures to protect the installed membrane.
- Ensure uniform heating across the membrane. Maintain an appropriate distance between the torch nozzle and membrane surface.
- During torch application, heat the membrane evenly until the bitumen surface becomes glossy black. The material surface temperature should not exceed 200°C.
- Ensure that adequate site safety measures are in place and fire-fighting equipment is provided in accordance with applicable regulations.
- Use suitable heating equipment and approved fuel or electric heating methods in accordance with the installation requirements.
Important: Torch-applied waterproofing involves open flames and high temperatures. Installation should be performed by trained personnel following applicable fire safety requirements.
Your Waterproofing Material Supply Partner
Choosing the right waterproofing membrane is only one part of a successful project. Consistent product specifications, suitable material selection and dependable supply are equally important for waterproofing contractors, distributors and building material importers.
At YUGO WATERPROOF, we focus on providing waterproofing material solutions for international construction markets. We work with professional customers to understand their product requirements and identify suitable materials for different applications.
- Product selection based on project requirements and application conditions.
- Multiple specifications and surface finish options.
- Technical product information for professional evaluation.
- Supply support for distributors, importers and waterproofing contractors.
- Export-oriented product packaging and order coordination.
Frequently Asked Questions
1. What is an SBS modified bitumen waterproofing membrane?
It is a bitumen-based waterproofing membrane modified with SBS elastomer to improve flexibility, elongation and resistance to temperature variations. It is commonly used in roofing and structural waterproofing applications.
2. What is the difference between Type I and Type II SBS membranes?
According to the available technical data, Type II offers higher tensile force, greater elongation, higher heat resistance and better low-temperature flexibility than Type I. The two grades can be selected according to project performance requirements.
3. What thicknesses are available?
The available thicknesses are 3.0 mm and 4.0 mm. The standard width is 1,000 mm, with a standard roll length of 10 m.
4. What surface finishes are available?
The membrane is available with PE film or mineral particle (sanded) surface finishes. The appropriate finish can be selected according to the intended application and system requirements.
5. How is the SBS waterproofing membrane installed?
The product is installed using the torch-applied hot-melt method. The substrate is first prepared and primed, followed by membrane heating, bonding and overlapping. Proper installation and joint treatment are essential for waterproofing performance.
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