Premium Oil Seals for Automotive & Industrial Use
STO Sealing – Trusted manufacturer since 1996. Delivering high-performance rubber sealing solutions to 40+ countries worldwide.
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STO Sealing – Trusted manufacturer since 1996. Delivering high-performance rubber sealing solutions to 40+ countries worldwide.
Xingtai Qingshan (STO) Sealing Co., Ltd has been a leading manufacturer of rubber sealing products since 1996. Located in Xingtai City — China's largest sealing products base — we specialize in producing high-quality oil seals, O-rings, hydraulic seals, mechanical seals, and custom rubber molded parts.
As a factory-focused supplier, STO is recognized globally for excellent product quality, consistent availability, and competitive pricing. Our sealing solutions are widely used in automotive, industrial machinery, hydraulics, mining, metallurgy, elevators, and irrigation systems.
High-performance sealing solutions for automotive, industrial, and agricultural applications. Precision-engineered for durability and reliability.
Precision-engineered rubber seals for Hyundai vehicles. Resistant to heat, oil, and wear.
Durable seals designed for Mitsubishi engines and transmissions. High resistance to pressure and temperature.
OEM-compatible seals for Volkswagen models. Excellent sealing performance under dynamic conditions.
Robust seals for Isuzu trucks and commercial vehicles. Designed for heavy-duty applications.
Specific model for Mitsubishi industrial machinery. Nitrile rubber construction with metal reinforcement.
High-reliability seals for Toyota engines and gearboxes. Long service life and leak-proof design.
Used in hydraulic cylinders and systems. Resistant to high pressure and fluid degradation.
Custom-molded O-rings and rubber components for industrial and automotive applications.
Seals for tractors, harvesters, and irrigation systems. Built to withstand dust, mud, and moisture.
Critical seals for power steering systems. Prevent fluid leakage and ensure smooth operation.
Precision seals for engine valve stems. Minimize oil consumption and emissions.
Used in pumps, compressors, and rotating equipment. Provide reliable sealing in harsh environments.
We combine decades of experience with advanced manufacturing to deliver sealing solutions you can trust.
Rigorous testing and ISO-compliant processes ensure every seal meets international standards.
Serving customers in over 40 countries with reliable logistics and support.
20+ years of experience in rubber molding and sealing technology.
Direct factory pricing without middlemen ensures value for money.
We primarily use Nitrile Rubber (NBR), Fluorocarbon Rubber (FKM/Viton), Silicone, and EPDM, depending on application requirements such as temperature, pressure, and chemical exposure.
Yes, we offer OEM and ODM services. Provide us with drawings, samples, or specifications and we’ll manufacture custom rubber seals to your exact needs.
Our seals are used in automotive, industrial machinery, hydraulics, agriculture, mining, metallurgy, elevators, and more.
Every batch undergoes strict inspection for dimensions, hardness, tensile strength, and performance under simulated conditions before shipment.
MOQ varies by product. For standard items, it can be as low as 100 pieces. Contact us for specific details.
Reach out to us for product inquiries, custom orders, or partnership opportunities.
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