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EPDM waterproof membrane
Professional EPDM membrane manufacturer & supplier form China.
EPDM waterproof membrane is known as an extremely durable rubber membrane that is 100% recyclable and eco friendly, it is made from Ethylene Propylene Diene Monomer rubber, or EPDM for short. Because they are widely used in roofing field, it also been called EPDM roofing membrane.
We Shuangshi are professional EPDM waterproof membrane manufacturer and supplier who can produce those rubber membrane ranges from 45 mils(1.1mm), 60mil(1.5mm) to 90 mils（2.3mm) thickness and the width could be up to 7.5 meters in one time without seaming or welding. there are few factory have this advanced technology.
The application scenario includes single-ply roofing waterproof system, reservoir and pond waterproof liners, window and facade curtains, vapor barriers, etc,.
We Shuangshi specialize in producing high-performance EPDM membrane which meet the specification of ASTM-D4637, ASTM D7465 , EN 13956, EN 13361/EN 13362, UL 790 and UL 1897，compatible with FM-approved systems, meanwhile, we also support OEM according to clients' requirements. we can also provide home delivery service and free samples, learn more policy about us and warranty.
To find the exact EPDM membrane model you need, please explore our catalog page.
Mainstream EPDM membrane For Sale
Explore our complete range of EPDM waterproof membrane specifications and models, please visit EPDM Product Catalog Page.
Membrane Type & Structure | Standard Thickness | Roll Dimensions (Width × Length) | Primary Application & Usage |
|---|---|---|---|
Homogeneous(Smooth) EPDM membrane | 60 Mil (1.52 mm) | 10 ft / 20 ft × 100 ft (3.0m / 6.0m × 30.5m) | Commercial Roofing / Flat Roofing |
Reinforced EPDM membrane (Polyester Scrim) | 60 Mil (1.52 mm) | 5 ft / 10 ft × 100 ft (1.5m / 3.0m × 30.5m) | High Wind Area Commercial Roofing (Mechanically Fastened suggested ) |
Fleece-Backed EPDM roofing Membrane | 60 Mil (1.52 mm + Fleece) | 5 ft / 10 ft × 100 ft (1.5m / 3.0m × 30.5m) | Concrete Basement |
Heavy-Duty Homogeneous EPDM membrane | 90 Mil (2.28 mm) | 10 ft × 50 ft / 100 ft (3.0m × 15.2m / 30.5m) | Premium Roofing Systems |
Homogeneous(Smooth) EPDM membrane | 45 Mil (1.14 mm) | 8.5 ft / 10 ft × 50 ft / 100 ft (2.6m / 3.0m × 30.5m) | Residential Flat Roofs, Sheds & RV Roofing |
EPDM Vapor Barrier | 30 Mil – 40 Mil (0.75 mm – 1.0mm) | 3.2 ft / 5.0 ft × 65 ft / 100 ft (1.0m /1.2m/ 1.5m × 20m / 30m) | Air & Vapor Control Barrier, Building Facades & Windows |
EPDM Pond Liner (Fish-Safe) | 45 Mil (1.14 mm) | 10 ft / 20 ft / 24.6 ft × 100 ft (3.0m / 6.0m / 7.5m × 30.5m) | Garden Ponds, Fish Farming, Decorative Streams & Fountains |
Reservoir & Civil Engineering EPDM Geomembrane | 60 Mil – 90 Mil (1.52 mm – 2.28 mm) | 20 ft/40ft × 100 ft (6.0m/ 12mExtra-Wide × 30.5m ) | Water Reservoirs, Canals, Agricultural Pools & Civil Infrastructure |
Shuangshi EPDM Waterproof Membrane Core Advantages
Superior bonding performance
We adjusted the production formula to improve the bonding performance of EPDM membranes, Our EPDM membranes not only support standard neoprene/butyl tape seaming, but are also specially engineered for hot-air welding. Particularly for pond liner applications, our heat-welded seams deliver superior bond strength and exceptional long-term watertight reliability.
Superior durability and longevity
Our EPDM rubber membrane shows a superior resistance to ozone, UV radiation and extreme temperatures( -45°C to +150°C)， their characteristics remain stable and unchanged over time because of our proper formulas . Studies show that EPDM roofing membranes have a life expectancy of more than 40 years. For more application, please go to our Success Case.
High flexibility and elongation
Our EPDM waterproof membrane remains highly flexible and elasticity, even at temperatures as low as -45°C. The membrane can also elongate over 300% to accommodate building movements and temperature fluctuations.
Sustainable quality control
Our manufacturing facilities have received the ISO 14001 certification, the EPDM rubber membrane is a non-toxic material and it can be recycled with no harm to environment. For more quality assurance, please go to our Certification Page for more details.
Technical Parameter | Test Method | Specified Requirement | Typical Test Value |
|---|---|---|---|
Thickness & Tolerances | ASTM D412 | 45 Mil / 60 Mil | 1.14 mm / 1.52 mm (±0.05 mm) |
Tensile Strength | ASTM D412 (Die C) | ≥ 9.0 MPa (1305 psi) | 10.2 MPa (1480 psi) |
Elongation rate | ASTM D412 | ≥ 300% | 400% |
Tear Resistance (Die C) | ASTM D624 | ≥ 26.3 kN/m (150 lbf/in) | 28.5 kN/m (163 lbf/in) |
Low Temperature Brittleness | ASTM D2137 | at -45°C No cracking | Pass (-45°C / -49°F No Cracking) |
Ozone Resistance | ASTM D1149 | No Cracking | Pass |
Accelerated Weathering (UV / Xenon Arc) | ASTM G155 / EN 1297 (4000 hours) | No crazing, cracking, or severe color change | Pass |
Puncture Resistance (Static & Dynamic) | ASTM E154 / EN 12691 | ≥ 220 N (50 lbf) | 250 N (56 lbf) |
Seam Peel & Shear Strength | ASTM D816 / ASTM D638 | Membrane Failure (Seam > Sheet Strength) | Membrane Breakage |
Fire Performance & External Exposure | UL 790 / EN 13501 | According to actual requirements | Customizable (Class B/ BROOF available) |
Download Technical Data Sheets(TDS)
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To get more EPDM membrane specification and criteria, you can go to our resource page for more information
Frequently Asked Questions about EPDM Membrane
What is the difference between vulcanized and non-vulcanized EPDM membranes?
As a leading EPDM membrane factory, Qingdao Shuangshi produces both Vulcanized (Cured) and Unvulcanized (Uncured) EPDM sheeting to cover complete commercial roofing and waterproofing systems. 1. Shuangshi Vulcanized(or cured) EPDM rubber roofing Factory cured technology modifies the molecular structure of EPDM rubber by introducing stable chemical bonds, significantly enhancing its performance characteristics as follows. Improved Weather Resistance – Superior UV, ozone, and oxidation resistance, as well as moisture properties. Enhanced Mechanical Strength – Tensile strength increases up to 300% compared to non-cured EPDM. Long-Term Stability – Maintains durability under extreme environmental conditions. Primary Applications: Roofing Membranes & RV Roofing – Widely used in flat roofs, commercial roofing, RV roofing due to its long lifespan and resistance to weathering. Pond Liners – Preferred for applications requiring high durability and chemical stability. 2. Shuangshi Non-Vulcanizd(or uncured) EPDM rubber roofing Non-vulcanized EPDM retains a more flexible molecular structure, offering distinct advantages: Thermal Bonding Capability – Exhibits superior heat-welding performance, making it ideal for seams and flashing in roofing systems. Stability Through Vulcanization – When exposed to high temperatures (e.g., during installation), its chemical structure stabilizes, improving long-term performance. Primary Applications: Roofing Flashings & Details – Used in critical sealing areas where heat welding is required. Large-Scale Civil Engineering Projects – Commonly applied in tunnel linings, subway systems, and other infrastructure due to its excellent thermal adhesion properties. Key Comparison Summary Property Vulcanized EPDM rubber Non-Vulcanized EPDM rubber Weather Resistance Excellent (UV, ozone, oxidation) Moderate (improves with heating) Tensile Strength Up to 300% higher Standard strength Thermal Bonding Limited Superior (ideal for welding) Primary Use Cases Flat roofs, pond liners, automotive Roof flashings, tunnels, subways.
Reinforced vs. unreinforced EPDM roofing membrane: Which one should I choose?
Qingdao Shuangshi manufactures single-ply EPDM roofing membranes in two primary structural variants: Reinforced (polyester scrim-embedded) and Non-Reinforced (unreinforced/homogenous). The addition of an internal polyester scrim grid provides exceptional tensile strength, tear resistance, and dimensional stability for demanding commercial applications. The Need for Reinforced EPDM EPDM sheets naturally exhibit thermal expansion and contraction properties. While this flexibility is advantageous, it can lead to long-term stress fatigue in non-reinforced membranes. The polyester reinforcement serves several critical functions: Provides structural support to resist stretching forces Maintains dimensional stability across temperature fluctuations Reduces the risk of stress cracking over time Improves resistance to wind uplift forces Reinforced EPDM rubber roofing Applications: Large commercial roofing systems (particularly those exceeding 10,000 sq.ft.) Roofs subject to significant thermal movement (e.g., over metal decks or in extreme climates) High-wind regions (meeting UL 1897 wind uplift requirements) Mechanically attached roof systems Roofs with potential foot traffic or equipment maintenance needs Cost Considerations The reinforced membrane typically carries a 15-30% price premium over non-reinforced options due to: Additional material costs (polyester scrim) More complex manufacturing process Higher performance specifications However, this additional cost is frequently justified by: Extended service life Reduced maintenance requirements Better performance in demanding conditions
How to install EPDM roofing membrane?
Qingdao Shuangshi suppliers high-performance EPDM membranes engineered to support all four industry-standard roofing installation methods. Whether your commercial project requires loose-laid ballasted systems or specialized hot-air welded seams, our membranes are formulated to deliver long-term weatherability and maximum bond strength across diverse structural designs. Ballasted System EPDM membrane The smooth EPDM membrane is loosely laid over the substrate and secured with rounded river stones (typically 1-2.5" diameter) at 10-15 lbs/sq.ft. This cost-effective method is ideal for large, flat roofs with adequate structural capacity. The stone ballast protects against UV degradation and wind uplift while allowing natural membrane movement. 2.Fully Adhered EPDM membrane Our Fully Adhered EPDM Membrane is produced with a butyl rubber adhesive layer and a protective film.The butyl rubber ensures excellent adhesion to substrates, which provides superior wind resistance and is preferred for steep slopes (up to 4:12) or roofs with penetrations. Clean substrate with no moisture and adhesive selection are critical for long-term performance. 3.Butyl Tape Seaming EPDM membrane Specially formulated butyl tapes create watertight seals at membrane overlaps. This cold-applied method offers quick installation without VOC emissions, making it suitable for occupied buildings or temperature-sensitive projects. Surface cleaning and primer application ensure optimal bond strength. 4.Hot Air Welding EPDM membrane Professional welding equipment heats the membrane edges to 500-600°F（260–316°C）， fusing them into a permanent seam. This creates the strong possible bond for EPDM seams, Shuangshi EPDM roof membrane have superior bonding performance when using the hot air welding method. Meanwhile, skilled technicians and proper quality control measures is also important for the welding waterproof system. To use which method depends on our contractors' roof design, climate conditions, budget, and performance requirements. All methods, when properly executed, can maintain 30+ years of service life.
Can EPDM roofing membrane be used as a pond or reservoir liner?
While EPDM roofing membranes and pond liners share the same fundamental rubber base, their compounding chemistry and physical performance are engineered differently to meet strict application environments. At Qingdao Shuangshi, we custom-formulate EPDM sheeting for both fire-rated commercial roofing and 100% fish-safe aquatic containment. Material Composition: Both products start with the same vulcanized EPDM material, but their formulations differ significantly: Roofing membranes incorporate UV stabilizers, fire retardants, and other additives to enhance weather resistance Pond liners maintain a cleaner formulation, free from harmful additives that could affect aquatic life Both types typically use vulcanized EPDM for improved bonding characteristics Performance Requirements: The different applications demand distinct physical and chemical properties: Roofing membranes prioritize: UV resistance for long-term sun exposure Fire resistance for building safety Thermal stability for temperature fluctuations Pond liners focus on: Fish-safe composition Puncture resistance against rocks and roots Flexibility to accommodate ground movement 2.Physical Specifications: The performance requirements lead to different product dimensions: Thickness: Roofing membranes: Typically 1.0-1.5mm Pond liners: Often thicker, ranging from 1.0-2.0mm for enhanced puncture resistance Width: Roofing membranes: Available in wider rolls for efficient installation Pond liners: Often narrower to accommodate custom pond shapes 3.Installation Methods: The application environments dictate different installation approaches: Roofing membranes offer multiple installation options: Fully adhered systems Mechanically fastened systems Hot air welded seams Ballasted (gravel-covered) systems Pond liners typically use: Seaming tape for most connections Limited hot air welding in specific cases No mechanical fasteners or adhesives that could harm aquatic life 4.Additional Differences: Lifespan: Roofing membranes: 30-40 years with proper installation Pond liners: 20-30 years, depending on environmental factors Maintenance: Roofing requires periodic inspection for punctures and seam integrity Pond liners need monitoring for root penetration and animal damage Cost Factors: Roofing membranes command higher prices due to specialized additives Pond liners are generally more affordable but require careful installation Understanding these differences is crucial for selecting the appropriate product and ensuring long-term performance in either application.