Metro & Tunnel Infrastructure
The global standard for underground transit systems and deep tunnels where high elasticity and permanent water pressure resistance are non-negotiable engineering requirements.
Factory Direct Supply
SBS Waterproofing Membrane
TY-SHIELD™ SBS (Styrene-Butadiene-Styrene) modified bitumen waterproofing membrane for cold-climate roofing, basements, foundations, tunnels, and infrastructure. Available in polyester (PY), glass fiber (G), and glass-reinforced polyester (PYG) reinforcement, with PE film, fine sand, mineral granules, or aluminum foil surfaces across 3mm, 4mm, and 5mm thicknesses. Standard references and product documentation depend on the selected configuration; confirm the applicable TDS before specification.
SBS ElastomericGB/T 18242 Series3mm / 4mm / 5mmPY / G / PYGTorch-Applied-25°C FlexibilityPE / Sand / Mineral / ALUOEM Available
Reinforcement Options
PY (Polyester) | G (Glass Fiber) | PYG (Glass Fiber Reinforced Polyester)
Standard Roll Size
1m × 10m | Customizable available
For project-specific pricing, send your technical requirements and destination port.
Direct Supply OEM Labeling Technical Support
Product Overview
How to Choose the Right SBS Waterproofing Membrane for Your Project?
Direct Answer: For cold climates (below -20°C) and heavy civil infrastructure, specify SBS Type II (4mm/5mm) with Polyester (PY) reinforcement. Based on 2026 factory performance benchmarks, SBS Type II maintains full flexibility down to -25°C, effectively preventing 98% of low-temperature cracking in high-altitude or refrigerated projects.
| Comparison Feature | Standard SBS (Type I) | TY-SHIELD™ SBS II (High Spec) |
|---|---|---|
| Low Temp Flexibility | -15°C to -20°C | -25°C (Guaranteed) |
| Tensile Strength | ≥ 500 N/50mm | ≥ 800-900 N/50mm |
| Heat Resistance | 90°C | 105°C |
2026 SBS Membrane Pricing & Inquiry Guide
Looking for the latest SBS membrane price? As a direct manufacturer, our wholesale rates vary based on current bitumen market indices and your specific project configuration.
Factor 01
Thickness (3mm-5mm)
Factor 02
Reinforcement (PY/G)
Factor 03
Order Quantity
* Competitive bulk quotes provided within 2 working hours. Free samples available for project verification.
Industrial-Grade Elastomeric Waterproofing for Global Infrastructure
Tianyuan's SBS Modified Bitumen Membrane is a high-performance rubber-modified system engineered for structures subject to high thermal movement—including metro tunnels, foundations, and cold-region roofing. Available in customizable PY, G, and PYG reinforcement with PE film, sand, or mineral granule surfaces.
Engineered Resilience
Cold Flexibility
Retains elastomeric properties down to -25°C, ensuring reliable sealing in cold climates.
Structural Compatibility
Anti-Cracking
Designed for projects where substrate movement and crack-bridging are critical safety requirements.
Technical Compliance
New GB Standard
Manufactured per GB/T 18242-2025 (Type II). Batch test reports available for project specification.
Expert Recommendation & Selection Tip
Hot Climate or Exposed Roof?
See our APP Modified Bitumen Membrane for 130°C heat resistance.
No Open Flame Allowed?
Check our Self-Adhesive Bituminous Membrane for safe, cold-applied installation.
Contact our export team with your target reinforcement type, thickness, surface finish, performance grade, and destination port. We will confirm the applicable quotation, documentation, sample option, and production schedule.
Available Configurations
Select the reinforcement, thickness and surface finish to match your project requirements. Contact us with your specification for a tailored quotation.
| Configuration | Reinforcement | Thickness | Surface | Recommended Use |
|---|---|---|---|---|
| SBS PY PE | Polyester Felt (PY) | 3mm / 4mm / 5mm | PE Film | Basement, foundation, protected roofing |
| SBS PY Mineral | Polyester Felt (PY) | 3mm / 4mm / 5mm | Mineral Granules | Exposed roofing cap sheet |
| SBS G PE | Fiberglass Felt (G) | 3mm / 4mm / 5mm | PE Film | Dimensionally stable multi-layer roof systems. Standard thickness per former GB 18242-2008: 3-4mm; 5mm available on request |
| SBS PYG PE | Composite (PYG) | 3mm / 4mm / 5mm | PE Film / Sand | Mechanically fastened single-layer roofing (legacy GB 18242-2008 classification); project-specific heavy-load systems. Standard thickness per former standard: 5mm; other thicknesses on request |
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All thicknesses and surface finishes shown are available in standard production. Custom roll dimensions, packaging and private-label printing are available subject to minimum order quantity. Final configuration should be selected according to climate, substrate, waterproofing system design, exposure condition and local project specifications.
Applications
Cold-Region Industrial Roofing
Specified for large-span industrial roofs in cold climates, where the membrane must survive extreme temperature swings without losing its waterproofing integrity.
Deep Foundation Waterproofing
Ideal for below-grade applications with significant structural settlement risks, providing a reliable barrier against aggressive groundwater and soil acids.
Key Benefits
Exceptional Tensile Resilience
Achieves superior tensile values (900N+ for Type II) combined with high elongation. This allows the membrane to function as a 'flexible skin' that bridges cracks and absorbs substrate deformation without rupturing.
All-Season Weather Versatility
Maintains its physical properties across a broad temperature spectrum, from -25°C to 105°C. This ensures consistent performance throughout the transition from freezing winters to intense summer sun.
Chemical & Corrosion Shield
The high-purity bitumen compound is naturally resistant to the acids, alkalis, and salts commonly found in soils and industrial environments, ensuring the membrane's longevity in buried applications.
Adaptive Installation Protocols
Fully optimized for precision torching (hot-melt) for maximum security, while remaining compatible with cold-applied adhesives where open flames are restricted, providing flexibility for diverse site conditions.
Technical Specifications
SBS PY II, 4mm, PE Film Surface (Representative Configuration)
| Test Item | Unit | Test Method | Requirement | Result / Notes |
|---|---|---|---|---|
| Soluble Content (3mm) | g/m² | GB/T 18242 | ≥ 2,100 | ≥ 2,100 |
| Soluble Content (4mm) | g/m² | GB/T 18242 | ≥ 2,900 | ≥ 2,900 |
| Soluble Content (5mm) | g/m² | GB/T 18242 | ≥ 3,500 | ≥ 3,500 |
| Tensile Strength — Peak (PY Type II) | N/50mm | GB/T 18242 | ≥ 800 | 900+ |
| Tensile Strength — Peak (PYG Type II) | N/50mm | GB/T 18242 | ≥ 900 | Typical value; confirm with the product TDS |
| Elongation at Peak (PY Type II) | % | GB/T 18242 | ≥ 40 | 40–50% |
| Heat Resistance (Type I) | °C / 2h | GB/T 18242 | 90°C, ≤ 2mm slip | No flow or drip |
| Heat Resistance (Type II) | °C / 2h | GB/T 18242 | 105°C, ≤ 2mm slip | No flow or drip |
| Low Temp Flexibility (Type II) | °C | GB/T 18242 | -25°C — No crack | No crack |
| Watertightness (PY) | MPa / min | GB/T 18242 | 0.3MPa, 30min | Impermeable |
| Seam Peeling Strength | N/mm | GB/T 18242 | ≥ 1.5 | ≥ 1.5 |
| Mass Gain After Water Immersion (PE/S) | % | GB/T 18242 | ≤ 1.0 | Typical value; confirm with the product TDS |
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Values shown apply to the stated product configuration. Other reinforcement types (PY / G / PYG), thicknesses (3mm / 4mm / 5mm), surface materials (PE / S / M / ALU), and performance grades (Type I / II) may have different performance values. Technical values reference the former GB 18242-2008 requirements; the current edition is GB/T 18242-2025 (effective 2026-05-01). Request the corresponding TDS and batch test report before specification or procurement.
Global Standard Alignment
Cross-reference for engineering specifications & global procurement
Reference Information
| Property | China (GB) | USA (ASTM) | Europe (EN) |
|---|---|---|---|
| Tensile Strength | ≥ 800 N/50mm | ASTM D6164 | EN 12311-1 |
| Low Temp Flexibility | -25°C | Reference value; confirm with the product TDS | Reference value; confirm with the product TDS |
| Heat Resistance | 90°C / 105°C | ASTM D5147 | EN 1110 |
| Compliance Status | GB/T 18242 | Equivalent | Equivalent |
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* Technical Note: The values shown are reference information for the selected product configuration. Confirm the applicable standard, test method, certification scope, and product-specific documentation with our technical team before specification.
Installation Guide
Surface Preparation
Ensure the substrate is dry, clean, smooth, and free from dust, oil, and loose particles. Fill cracks and surface irregularities with polymer mortar. Concrete surfaces should be fully cured.
Priming
Apply bitumen primer evenly and completely over all surfaces to be waterproofed. Allow the primer to dry fully before membrane installation — this ensures maximum adhesion between the substrate and the torch-applied membrane.
Membrane Laying
Use the torch application (hot-melt) method: heat the lower PE film and bitumen coating with a controlled propane flame until the bitumen melts uniformly. Roll the membrane forward with steady pressure. For projects where open flame is restricted, cold-bonding adhesives are fully compatible.
Seam & Detail Treatment
Maintain a minimum 100mm longitudinal lap and 150mm end lap. Roll all seams firmly to squeeze out a small bead of molten bitumen — this confirms a continuous, monolithic seal. On vertical surfaces, fix with metal battens and seal with compatible sealant.
Related Technical Guides
Packaging & OEM
Export Standard Packing
Rolls are secured vertically on fumigated wooden pallets, wrapped in high-density polyethylene film with corner protectors and heavy-duty strapping for safe ocean freight transit.
Custom OEM Labeling
Full private label support including custom-printed wrapping film, branded core sleeves, pallet labels, and outer-package markings for wholesale and distribution partners.
Storage Recommendations
Store rolls vertically in original packaging in a dry, ventilated area below 50°C. Avoid direct sunlight and rain exposure. Shelf life: 12 months under standard conditions.
Export Loading Reference
Roll Size
1m × 10m (standard)
3mm — 20FT Container
Approx. 4,000–5,000 m²
4mm — 20FT Container
Approx. 3,000–4,000 m²
5mm — 20FT Container
Approx. 2,500–3,500 m²
Note
Final loading depends on roll weight, reinforcement type, surface finish, pallet configuration, and destination-country weight limits.
Ordering Information
Export Supply Reference
MOQ
1 × 20FT container per specification. Mixed container loading available.
Sample
Sample availability, format, and courier arrangements depend on the selected configuration and destination.
Production Schedule
Confirmed after specification, quantity, packaging, and deposit requirements are reviewed.
Payment Terms
T/T 30% advance, 70% against B/L copy.
Loading Port
Qingdao, China
Documents
TDS, MSDS, Packing List, Certificate of Origin
Inspection
Factory QC + third-party inspection available on request
OEM Service
Custom roll printing, branded wrapper, private-label pallet marking
Project References
Flat Roof Waterproofing Project, Thailand
ConfigurationSBS PY Mineral, 4mm, Mineral Granules
Quantity10,000 sqm
Year2026
Technical Downloads
SBS Waterproofing Membrane TDS
Ready for PDF Request
SBS Membrane Installation Manual
Ready for PDF Request
RELATED PRODUCT
Frequently Asked Questions
What is SBS modified bitumen waterproofing membrane?
SBS (Styrene-Butadiene-Styrene) modified bitumen membrane is a reinforced waterproofing sheet where the bitumen is modified with a rubber-based thermoplastic elastomer. This modification gives the membrane true elastomeric properties — it stretches and recovers like rubber — making it ideal for structures subject to thermal movement, structural settlement, and cold-climate conditions. It is typically installed by torch application (hot-melt), though cold-bonding methods are also compatible.
When should I choose SBS instead of APP membrane?
SBS is the preferred choice for cold-climate regions and structures subject to significant thermal movement. Its rubber modification provides low-temperature flexibility down to -25°C (Type II) — far superior to APP's -15°C. Choose SBS for tunnels, basements, foundations, and roofing in temperature-variable regions. Choose APP for hot-climate exposed roofing where heat resistance (130°C) is the priority. Both can be torch-applied and are compatible with cold-bonding.
What is the difference between PY, G, and PYG reinforcement?
PY (Polyester Felt) offers the highest elongation and movement accommodation — the common choice for substrates with structural movement, tunnels, and below-grade waterproofing. G (Glass Fiber Felt) provides dimensional stability — suitable for stable substrates and multi-layer roof systems where thermal movement is minimal. PYG (Glass Fiber Reinforced Polyester) is a legacy composite classification from the former GB 18242-2008 standard, combining polyester with embedded glass strands; it was intended mainly for mechanically fastened single-layer roofing. Under the current GB/T 18242-2025 standard, PY and G are the principal reinforcement categories.
Which surface finish should I choose?
PE Film is the standard for non-exposed layers in multi-layer systems and below-grade applications. Fine Sand (S) provides additional inter-layer bonding for multi-course roof systems and is specified for underground engineering. Mineral Granules (M) — slate chips — provide built-in UV protection for exposed roofing cap sheets. Aluminum Foil (ALU) provides the highest reflectivity and vapor barrier properties. Our spec table lists all compatible combinations by thickness.
What is the difference between Type I and Type II SBS membrane?
Type I is the standard performance grade: 90°C heat resistance, -20°C low-temperature flexibility, lower tensile strength (≥500 N/50mm PY). Suitable for general waterproofing in moderate climates. Type II is the high-performance grade: 105°C heat resistance, -25°C low-temperature flexibility, higher tensile strength (≥800 N/50mm PY / ≥900 PYG), and higher elongation (≥40%). Recommended for demanding civil engineering, cold-climate infrastructure, and projects requiring extended warranty coverage.
Can SBS membrane be cold-applied?
Yes. While torch application is the standard and most reliable method, SBS membrane is fully compatible with cold-bonding adhesives. This is useful for projects where open-flame work is restricted — for example, over occupied buildings, near flammable materials, or in confined spaces. Select from full-adhesion, strip-adhesion, or spot-adhesion methods based on your substrate conditions and wind uplift requirements.
Do you offer OEM / private label for SBS membrane?
Yes. We support OEM and private-label programs, including custom roll printing, branded wrapper film, pallet marking, and selected specification adjustments. MOQ, mixed loading, sample availability, and preparation time depend on the product and order requirements; contact our export team for confirmation.
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