351pc Silicone O-Ring Set 10 Sizes – Oil & Heat Resistant Seals

351-Piece Silicone O-Ring Set – 10 Sizes for Every Sealing Need

Keep leaks at bay with this comprehensive 351-piece silicone O-ring assortment. Featuring 10 different sizes in a single kit, this set is the go-to solution for automotive repair, industrial piping, hydraulic systems, and household appliances. Whether you're a professional mechanic or a dedicated DIYer, having the right seal on hand saves time, money, and frustration.

Made in Mainland China.

Why Choose This Silicone O-Ring Kit?

• 10 Size Variety: Covers a wide range of inner diameters and cross-sections, making it adaptable to countless automotive, plumbing, and industrial fittings.
• Oil & High-Temperature Resistant: Crafted from premium silicone, these O-rings withstand exposure to oils, fuels, and elevated temperatures — ideal for engine bays, hydraulic circuits, and more.
• Superior Sealing Performance: The high-elasticity silicone conforms tightly to mating surfaces, creating a reliable barrier against liquid and gas leaks for long-term, worry-free operation.
• Corrosion & Aging Resistant: Silicone's inherent chemical stability means these rings resist degradation from common automotive fluids and environmental exposure, dramatically extending their service life.
• CE Certified: Meets CE certification standards, giving you confidence in quality and safety compliance.
• Widely Applicable: Perfect for cars, trucks, motorcycles, industrial pipelines, plumbing fixtures, air compressors, and household appliances.

Kit Contents

• 351 silicone O-rings across 10 sizes
• Organized for easy size selection

Specifications

Where Can These O-Rings Be Used?

These versatile seals are designed for:

• Automotive engines, transmissions, and fuel systems
• Hydraulic and pneumatic systems
• Water supply and plumbing pipelines
• Air compressors and pumps
• Household appliances (washing machines, dishwashers, coffee makers)
• General industrial maintenance and repair

For guidance on safe practices when working with automotive fluids and sealing systems, refer to the OSHA Automotive Service Safety Resources.

Learn more: O-ring

Frequently Asked Questions

Q: What sizes are included in this silicone O-ring set?

A: The kit includes 10 different O-ring sizes spanning a range of inner diameters and cross-sections, providing 351 total pieces. This multi-size assortment ensures compatibility with a wide variety of automotive, plumbing, and industrial fittings.

Q: Are these O-rings suitable for high-temperature automotive engine applications?

A: Yes. These O-rings are made from high-quality silicone, which offers excellent resistance to heat and oil. They are designed to perform reliably in demanding environments such as automotive engines, hydraulic systems, and high-temperature pipelines.

Q: How do silicone O-rings compare to rubber O-rings?

A: Silicone O-rings generally outperform standard rubber O-rings in terms of temperature range, UV resistance, and aging resistance. They maintain their elasticity and sealing integrity over a longer service life, making them more cost-effective for demanding applications.

Q: Can these O-rings be used for both liquid and gas sealing?

A: Absolutely. The high-elasticity silicone material creates a tight, conforming seal against both liquid and gas leakage, making this kit suitable for fuel lines, water pipelines, compressed air fittings, and more.