As a leading manufacturer of rubber sealing solutions based in Dongguan, China—renowned as the country’s hub for mold manufacturing—we specialize in oil-resistant O-rings, mechanical seals, and multi-role EPDM rubber piston seal O rings, offering fully customizable services at competitive prices. Our O rings are engineered to deliver exceptional performance in high-pressure, oil-exposed environments, combining precision engineering, durable materials, and cost-effectiveness to meet the diverse needs of industrial clients worldwide. Whether you require standard oil-resistant O-rings or custom EPDM rubber piston seal O rings tailored to unique mechanical specifications, our factory-direct capabilities ensure reliable, high-quality sealing solutions that stand up to rigorous industrial use.
Core Features of Our Oil Resistant O-rings & EPDM Rubber Piston Seal O Rings Our O rings are defined by superior material performance, precision design, and multi-functional durability—key traits that set them apart in industrial sealing applications.First, the material quality of our O rings is optimized for oil resistance and longevity. We use premium EPDM rubber for piston seal O rings, which delivers exceptional resistance to oils, lubricants, weathering, and ozone, while maintaining flexibility across a wide temperature range (-40°C to 150°C). All oil-resistant O-rings are crafted from high-grade synthetic rubber compounds that prevent swelling, cracking, or degradation when exposed to petroleum-based fluids, ensuring consistent sealing performance over time.Second, precision manufacturing is central to our O rings. With a tolerance of ±0.05mm, every O ring is molded to exact dimensions, ensuring a perfect fit for mechanical seals, piston assemblies, and other industrial components. Our advanced molding equipment and 20+ years of rubber processing expertise eliminate dimensional inconsistencies, reducing the risk of leaks or equipment failure caused by ill-fitting O rings.Third, versatility is a hallmark of our O rings. The multi-role design of our EPDM rubber piston seal O rings allows them to function across diverse applications—from hydraulic systems to automotive engines—while oil-resistant O-rings can be adapted to different sizes, shapes, and hardness levels to match specific industrial requirements.
Competitive Advantages of Our Oil Resistant O-rings & EPDM Rubber Piston Seal O Rings Choosing our O rings means partnering with a manufacturer that prioritizes value, customization, and quality assurance—without compromising on affordability. Factory-Direct Pricing & Flexible Customization We offer low-price O rings by cutting out middlemen, passing cost savings directly to our clients. Our custom service for O rings covers every aspect of personalization: custom sizes, shapes, hardness ratings, and material blends (including specialized oil-resistant compounds) to meet your exact mechanical seal needs. With over 2000 existing molds and in-house mold design capabilities, we can produce custom O rings with fast turnaround times, even for unique specifications. Rigorous Quality Control & Certification Every O ring undergoes 100% quality inspection before leaving our facility, including pressure testing, dimensional checks, and oil resistance validation. Our manufacturing processes comply with ISO 9001-2015 (quality management), ISO 14001-2015 (environmental management), and ISO 45001-2018 (occupational health and safety) standards, ensuring O rings meet global industrial quality benchmarks. We also back all O rings with a 3-year warranty—if unused O rings develop quality issues within this period, we offer free returns and replacements. Scalable Ordering & Fast Lead Times Our MOQ for O rings is designed to accommodate businesses of all sizes, from small-scale workshops to large industrial manufacturers. Stock samples of O rings are shipped within 3 days, allowing you to test fit and performance before full production. For custom O rings, our one-stop procurement service streamlines design, molding, and delivery, reducing lead times and simplifying supply chain management. 24/7 Customer Support & Technical Expertise Our team of rubber processing specialists provides 7×24 online support for all inquiries related to O rings—from material selection advice to post-delivery technical assistance. We work closely with clients to understand their mechanical seal requirements, ensuring O rings are optimized for their specific equipment and operating conditions.
Applications of Our Oil Resistant O-rings & EPDM Rubber Piston Seal O Rings Our versatile O rings serve a wide range of industrial sectors, thanks to their oil resistance, precision fit, and durable performance:
Automotive Industry: Oil-resistant O-rings and EPDM rubber piston seal O rings are critical for engine components, transmission systems, and hydraulic brakes—they seal against motor oil, transmission fluid, and brake fluid, preventing leaks and ensuring reliable vehicle operation. Hydraulic & Pneumatic Systems: Multi-role O rings are used in hydraulic cylinders, pneumatic valves, and industrial pumps, where their oil resistance and precision fit maintain pressure integrity and prevent fluid contamination in high-pressure environments. Manufacturing & Heavy Machinery: O rings seal gearboxes, compressors, and conveyor systems in manufacturing plants and construction equipment—their durability and oil resistance withstand the harsh operating conditions of heavy machinery, reducing downtime and maintenance costs. Aerospace & Marine: Our oil-resistant O-rings are adapted for aerospace hydraulic systems and marine engine components, where they resist jet fuel, lubricants, and saltwater corrosion, meeting the strict performance standards of these high-stakes industries. Oil & Gas Equipment: O rings are integrated into oil drilling equipment, pipeline valves, and storage tanks—their oil resistance and pressure tolerance ensure safe, leak-free operation in upstream and downstream oil and gas applications.
At our 10,000-square-meter manufacturing facility, we leverage over 20 years of rubber and plastic processing experience to produce O rings that combine reliability, affordability, and performance. Our team of 100+ professionals, advanced production equipment, and strict quality control processes ensure every O ring meets your exact specifications—whether you need standard oil-resistant O-rings or custom EPDM rubber piston seal O rings. We are committed to delivering O rings that exceed industry standards, with on-time delivery and consistent quality across every batch. With our O rings, you gain a trusted partner for all your mechanical seal needs—backed by factory-direct pricing, expert customization, and unwavering technical support.
Company Profile
Founded in 2003, Dongguan Huangshi Rubber & Plastic Tech Co., Ltd. is one of the famous silicone and plastic products manufacturers. Our factory is located in Chang'an Town, Dongguan City, enjoying good location and convenient transportation access. Being specialized in silicon mold making,plastic mold making and silicon and plastic products manufacturing, we always try our best to provide you with best-quality products. With a workshop of 6,000 square meters and a serious QC department, we are professional in making all kinds of silicone and plastic cases for cells phones, MP3, MP4 and MP5 players, silicone keyboards, silicone series parts of electronic goods, silicone kitchen accessories and silicone toys. We are sure to make better quality and better price silicone rubber and plastic products for you. Our main foreign trade markets include Southeast Asia, Europe and America. We also provide ODM/OEM products for many national famous companies. In order to satisfy different requirements from our clients, we import raw materials and machines to make our goods reach the standards of RoHS, ISO, SGS and EN71. "Do a good job at first time; do a better job every time" is our tenet. Please don't hesitate to contact us if you have any problem. We must be the one which you can trust in. We look forward to your requirements. Choose us,and we can do better for you!
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