High-quality thermoplastic vulcanizate (TPV) EPDM sealing strips represent a significant advancement in sealing technology. These strips combine the excellent elasticity and weather resistance of thermoset rubber with the easy processability and recyclability of thermoplastics. The unique molecular structure of TPV EPDM ensures that the sealing strip maintains its shape and sealing force over a wide temperature range, from -40°C to 150°C. This material is particularly valued in applications where long-term durability and consistent performance are critical. Unlike conventional rubber seals that can harden or crack over time, TPV EPDM strips provide a robust sealing solution that resists ozone, UV radiation, and harsh chemicals. The production process for these strips, whether via extrusion or injection molding, allows for tight dimensional tolerances and complex profile geometries. Manufacturers like Shanghai Dongming have invested heavily in advanced compounding and processing equipment to ensure product uniformity. As a result, end users benefit from a reliable sealing strip that requires minimal maintenance and offers an exceptional service life.

Furthermore, TPV EPDM sealing strips are formulated to be low in volatile organic compounds (VOCs), making them suitable for interior applications where air quality is a concern. This environmentally friendly attribute aligns with global trends toward sustainable and green building materials. The material can be easily colored during processing, enabling seamless integration with surrounding components. Whether the requirement is for a soft, flexible seal for a car door or a firmer, structural seal for an industrial enclosure, TPV EPDM can be tailored to meet specific performance criteria. The inherent recyclability of the thermoplastic phase also reduces waste during manufacturing, as scrap can be reprocessed and reused. In summary, TPV EPDM sealing strips offer a superior alternative to traditional rubber seals, combining high performance with manufacturing efficiency.

One of the most compelling features of TPV EPDM sealing strips is their outstanding weather resistance. Exposure to intense sunlight, rain, snow, and extreme temperatures does not degrade the material quickly, thanks to the EPDM phase which is inherently resistant to UV radiation and ozone attack. This weather resistance is quantified through accelerated aging tests such as QUV testing, where the strip retains more than 80% of its original tensile strength and elongation after weeks of simulated exposure. Beyond weather resistance, these strips offer remarkable flexibility and compression set resistance. They return to their original shape even after prolonged compression, ensuring that the seal remains effective over many years of service. This elastic memory is crucial in automotive door seals, where repeated opening and closing cycles must not compromise the tightness of the seal against wind, water, and dust.

Another significant advantage is the material's high tensile strength and tear strength, which allows the strip to withstand mechanical stresses during installation and use without tearing or splitting. For automotive sealing strips, this is particularly important in areas such as trunk lids and sunroofs where the seal may be stretched or pinched. The material also has excellent abrasion resistance, extending its life in dynamic applications. From a processing standpoint, TPV EPDM can be extruded into complex profiles with sharp edges and thin walls, enabling design engineers to create efficient sealing geometries that save space and weight. The thermoplastic nature of the material allows for melt adhesion to other plastic components, opening up possibilities for co-extruded seals with rigid mounting bases. Additionally, the low VOC emission levels of premium TPV EPDM compounds meet stringent automotive interior standards like VDA 278, making them ideal for cabin sealing components. With customizable hardness ranging from Shore A 50 to 85, designers can fine-tune the balance between sealing force and ease of closure.

TPV EPDM sealing strips are widely used in the automotive sector for critical sealing functions. In vehicles, they are employed as automotive door seals, window glass runs, trunk seals, sunroof seals, and hood seals. Each application demands specific properties: door seals require high flexibility and compression set resistance; window seals need low friction surfaces; and trunk seals must handle occasional compression without taking a permanent set. The material's ability to combine these characteristics in one extruded profile makes it a preferred choice among OEMs and tier suppliers. Furthermore, the lightweight nature of TPV compared to traditional rubber helps contribute to overall vehicle weight reduction, supporting fuel efficiency goals. As electric vehicles proliferate, the need for effective acoustic and thermal sealing becomes even more critical, and TPV EPDM strips can be formulated with lower density foam cores to provide superior noise, vibration, and harshness (NVH) performance.

In the construction industry, these strips are used as weatherstripping for windows, doors, curtain walls, and expansion joints. The weather resistance and durability of TPV EPDM ensure that building envelopes remain airtight and watertight for decades. For commercial buildings, custom rubber profiles can be designed to match the specific gap dimensions and installation methods required by architects. The material can be produced in a wide range of colors to match window frames or door panels, eliminating the need for painting. In industrial equipment, TPV EPDM sealing strips seal control cabinets, enclosures, and machinery covers against dust, moisture, and chemicals. Here, the high chemical resistance of EPDM-based compounds to many acids, alkalis, and cleaning agents is a distinct advantage. The strips are also used in the appliance industry, for example as gaskets in refrigerator doors and washing machine portholes. In each environment, the customizability of the sealing strip profile ensures perfect fit and function, reducing assembly time and the risk of leak paths.

Shanghai Dongming subjects its TPV EPDM sealing strips to a comprehensive battery of tests to ensure consistent high quality. Hardness, measured on the Shore A scale, typically ranges from 55 to 80, providing the right balance between flexibility and sealing force. Tensile strength values exceed 8 MPa for standard grades, with elongation at break often surpassing 400%. These mechanical properties ensure that the strip will not tear during installation or service. Tear strength is measured using the trouser tear method and typically reaches 30 N/mm or more, giving confidence in high-stress areas. For applications requiring specific friction characteristics, the coefficient of friction can be adjusted through surface treatments or co-extrusion of a low-friction layer. Accelerated aging tests, including UV exposure (QUV) and heat aging at 100°C for 500 hours, show minimal property changes, confirming long-term reliability.

Every batch of TPV EPDM compound is tested for melt flow index (MFI) and dispersion quality before extrusion to ensure consistent processing. Inline measurement systems monitor the cross-sectional dimensions of the extruded profile continuously, automatically adjusting processing parameters to keep tolerances within ±0.2 mm. For critical sealing lines in automotive applications, additional tests for water tightness and air leakage are conducted using specialized test fixtures. The company also performs environmental stress crack resistance tests and ozone resistance tests (50 pphm at 40°C for 100 hours) to confirm zero cracking. With these rigorous quality control measures in place, customers can be confident that every meter of sealing strip delivered meets the stringent requirements of their application, whether it is a production run of a million units or a custom order for a prototype.

Shanghai Dongming offers extensive customization for TPV EPDM sealing strips, recognizing that no two sealing challenges are identical. Customers can choose from a library of existing extrusion tooling or have new dies manufactured for unique cross-sectional profiles. The company uses CAD/CAM software to design profiles and simulate the extrusion process, ensuring that the final product matches the intended geometry precisely. Dimensional tolerances can be held as tight as ±0.15 mm for critical dimensions. Hardness can be tailored between 50 and 90 Shore A, and the material can be compounded with special additives for flame retardancy, UV stabilization, or antimicrobial properties. Color matching is done using spectrophotometers to achieve any RAL, Pantone, or custom color, and high-contrast colors are available for visual identification in assembly lines.

For packaging, the strips can be wound onto spools or cut to precise lengths and boxed, depending on the customer's assembly process. Tape-on or adhesive-seal options are available, where a layer of pressure-sensitive adhesive is applied to one side of the strip for easy installation. The packaging can also include labeling with barcodes, part numbers, and quality stamps to streamline inventory management. Whether the requirement is for a small custom order for prototype development or a high-volume production run with just-in-time delivery, Shanghai Dongming has the flexibility to accommodate. The engineering team works closely with clients from the initial concept through to production testing, often providing free sample lengths for qualification before full production commences. This collaborative approach ensures that the final sealing strip is optimized for both performance and cost.

Shanghai Dongming Rubber & Plastic Products Co., Ltd. has been a trusted manufacturer of high-quality TPV and EPDM sealing strips for over a decade. Our extensive experience in compounding, extrusion, and quality control translates into products that consistently meet or exceed industry standards. We pride ourselves on using only virgin raw materials and advanced twin-screw compounding technology to achieve uniform dispersion of crosslinkers, fillers, and stabilizers. This technical expertise allows us to offer compounds with very low batch-to-batch variation, which is critical for large-scale production operations. Our factory is equipped with state-of-the-art extrusion lines that can handle high throughput while maintaining tight tolerances. We also operate an in-house tool shop for rapid fabrication of extrusion dies, reducing lead times for custom profiles.

Our commitment to quality is validated by certifications such as ISO 9001 and IATF 16949 for automotive production. We understand that a sealing strip failure can lead to costly repairs or product recalls, so we test every lot thoroughly before shipment. Competitive pricing is achieved through efficient manufacturing processes and strong relationships with raw material suppliers. We also offer fast delivery capabilities, with standard lead times of 2–3 weeks for custom profiles and 1 week for standard products. To learn more about our company history, team, and manufacturing capabilities, please visit our Company Profile. We believe that the combination of technical expertise, rigorous quality control, and customer-centric service makes Shanghai Dongming the ideal partner for your sealing needs.

Ready to enhance the performance and longevity of your sealing applications? The first step is to contact Shanghai Dongming for a consultation. We can discuss your specific requirements, recommend the optimal TPV EPDM grade and profile design, and provide a detailed quotation. For customers who require validation, we can supply free sample lengths of up to 500 mm for testing under actual conditions. Our engineering team will work with you to ensure that the sample meets your dimensional, mechanical, and weathering requirements before you commit to a production order. We also offer support for prototype tooling if a new profile is needed, often with quick turnaround times.

To request a quote, simply send us your drawings, specifications, or a description of the application. We will respond within 24 hours with a preliminary price estimate and lead time. For existing profiles, we can often provide pricing immediately. You can also request a sample kit containing several standard grades and colors to evaluate in your own facility. We aim to make the procurement process as seamless as possible, from initial inquiry to ongoing production support. Choose Shanghai Dongming for high-performance EPDM sealing strips that deliver reliability, flexibility, and value. Contact us today to experience the difference that quality sealing can make for your products.