351-Piece Silicone O-Ring Set – 10 Sizes, Oil & Heat Resistant

351-Piece Silicone O-Ring Assortment Kit – 10 Standard Sizes

Never get caught short on the right seal again. This comprehensive 351-piece silicone O-ring set gives you 10 different standard sizes in one kit — everything you need to tackle leaks, repairs, and maintenance jobs on cars, pipelines, hydraulic systems, household appliances, and more. Made in Mainland China from premium silicone rubber, these vibrant red O-rings are built to perform where it matters most.

Why Choose This O-Ring Assortment?

• 10 Standard Sizes in One Kit: 351 pieces covering a wide range of sealing applications, so you always have the right size on hand — no more last-minute hardware runs.
• Premium Silicone Material: High-quality silicone rubber offers outstanding resistance to oils, fuels, and high temperatures — ideal for demanding environments like car engines and hydraulic circuits.
• Excellent Elasticity & Tight Seal: The flexible silicone conforms snugly to mating surfaces, creating a reliable barrier against liquid and gas leaks for long-lasting performance.
• Corrosion & Aging Resistant: Designed to resist deterioration from chemicals, heat, and time — reducing the need for frequent replacements and saving you money in the long run.
• Widely Versatile: Perfect for automotive repair, industrial piping, plumbing, HVAC systems, and general household appliance maintenance.

Product Specifications

Ideal Applications

• Automotive engine sealing & fuel system repairs
• Industrial & residential pipelines
• Hydraulic and pneumatic systems
• Household appliances (washing machines, faucets, etc.)
• HVAC and refrigeration units
• General plumbing and DIY repair projects

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Expert Reference

For guidance on safe handling of rubber and chemical materials in automotive and industrial applications, visit the U.S. Occupational Safety and Health Administration (OSHA).

Frequently Asked Questions

Q: What sizes are included in this 351-piece silicone O-ring set?

A: The kit includes 10 different standard sizes, giving you a wide range of options to handle various sealing tasks across automotive, piping, plumbing, and appliance applications — all in one convenient assortment.

Q: Are these silicone O-rings safe for use in car engines and high-heat environments?

A: Yes! The silicone rubber material is specifically chosen for its excellent oil and high-temperature resistance, making these O-rings well-suited for car engines, hydraulic systems, and other high-heat, high-pressure applications.

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

A: Silicone O-rings generally outperform standard rubber in terms of temperature range, UV resistance, and longevity. They remain flexible across a broader temperature spectrum and are more resistant to aging and corrosion, making them a more economical long-term sealing solution.

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

A: Absolutely. The highly elastic silicone material creates a tight, conforming seal against most interface surfaces, effectively preventing both liquid and gas leaks in pipelines, automotive parts, and appliances.