O-ring Repair Kit

An O-Ring repair kit is an assorted, ready-to-use box of O-Rings in multiple sizes, kept on hand so a leak or worn seal can be fixed immediately instead of waiting on a special order. Kesaria Rubber Industries manufactures three types of O-Ring repair kit boxes  5A, 5B, and 5C - each available in two materials, NBR (Nitrile) and Silicone Rubber, giving six ready-made kits to suit different repair and maintenance needs. These kits are built for urgent situations: preventing or repairing unwanted leakage in valuable equipment without downtime. Each kit holds its assorted O-Rings organized by size in a durable, compartmentalized storage case for quick identification and selection during a repair. They are widely used across automotive repair, plumbing, hydraulic and pneumatic systems, industrial machinery, HVAC systems, and general household or industrial maintenance - including everyday fixes like kitchen and bathroom faucets, vehicle engines, and air conditioning systems.
  • Two material options: NBR (Nitrile Rubber)  oil- and high-temperature-resistant, durable; and Silicone Rubber - soft, flexible, oil- and high-temperature-resistant, with some kits offering electrical insulation, anti-static properties, and food-grade capability.
  • Three kit sizes: 5A and 5B kits contain 382 pieces across 30 assorted sizes; the 5C kit contains 386 pieces across 30 assorted sizes.
  • Organized storage: each kit comes in a hard-wearing, compartmentalized case with sizes clearly separated and labeled for fast access.
  • Backed by Kesaria's manufacturing scale: Kesaria Rubber Industries is a leading manufacturer and exporter of rubber, TPE, and PTFE components, supplying customers throughout India and exporting to 27+ countries across Europe, North America, Asia, Africa, and the Middle East.
O Ring Kit

5A NBR O-Ring Repair Kit

An emergency repair kit containing 382 pieces of NBR (Nitrile Rubber) O-Rings in 30 assorted sizes, ranging from 2.9mm to 43.82mm. The O-Rings are soft, flexible, oil-resistant, and capable of withstanding high temperatures, and are organized in a compact, easy-to-access storage case for quick selection. Widely used in hydraulic and pneumatic systems, automotive repairs, plumbing, and machinery maintenance.

5A Silicone O-Ring Repair Kit

The silicone counterpart to the 5A kit: 382 pieces of high-quality silicone O-Rings in 30 assorted sizes, from 2.9mm to 43.82mm. Designed for high-temperature resistance and oil compatibility, these O-Rings are known for their softness, flexibility, and ease of installation. Suited to automotive, plumbing, industrial equipment, and HVAC repair applications.

5B NBR O-Ring Repair Kit Box

Made from soft, pliable, and durable Nitrile Rubber (NBR), this kit packs 382 pieces across 30 assorted sizes into a hard-wearing storage case, with every size kept separated and organized. Designed to seal liquid and gaseous media for the long term with high durability, suited to a wide range of industrial applications.

5B Silicone O-Ring Repair Kit

A silicone-material version of the 5B kit, offering 382 pieces of soft, flexible O-Rings well suited to oil resistance and a variety of repair applications, including plumbing, automotive repairs, hydraulic and pneumatic systems, industrial machinery, HVAC systems, and general maintenance.

5C NBR O-Ring Repair Kit

A comprehensive repair kit containing 386 pieces of NBR O-Rings in 32 assorted sizes, ranging from small to large, at 70 Shore hardness. The O-Rings are durable, flexible, oil-resistant, and provide a secure seal for liquids and gases. Ideal for automotive maintenance, plumbing, kitchen and bathroom faucets, air conditioning systems, and other household or machinery repair tasks.

5C Silicone O-Ring Repair Kit

Housed in a box made of high-quality silicone rubber material that is itself high-temperature resistant, offers good electrical insulation and anti-static properties, and can be produced in a food-grade formulation. The kit includes 386 pieces across 32 assorted sizes with a detailed size chart, suited to water seals, oil seals, shaft seals, hole seals, fixed seals, dustproof seals, guide rings, and rotary seals.

Industries Served

Plumbing &
Bathware

Automobile &
Automotive OEM

Home
Appliances

Electrical &
Electronics

Oil &
Gas

Medical
Equipment

Why Choose Kesaria Rubber

Kesaria is not just a rubber manufacturer – it is a precision sealing partner trusted by some of the world’s most demanding OEM brands.
With ISO-aligned quality systems, automated inspection, recipe-controlled compounding, and a dedicated physical and chemical testing facility, every component that leaves Kesaria’s facility meets the standard expected by global buyers.

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years of rubber manufacturing experience since 1989
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pieces per day total production capacity
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Active SKUs covering standard and custom specifications
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countries across Europe, North America, Asia, Africa, and the Middle East
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FAQ
You have questions.
We have answers.
What is an O-Ring repair kit used for?
An O-Ring repair kit provides an assorted set of ready-to-use O-Rings so leaks can be fixed or prevented immediately, without waiting on a special order. Kesaria's kits are widely used in automotive repair, plumbing, hydraulic and pneumatic systems, industrial machinery, and HVAC systems.
What's the difference between NBR and Silicone O-Ring repair kits?
NBR (Nitrile Rubber) O-Rings are durable and resistant to oil and high temperatures, making them well suited to general industrial and automotive repair. Silicone O-Rings are softer and more flexible, also oil- and high-temperature-resistant, with some Kesaria silicone kits additionally offering electrical insulation, anti-static properties, and food-grade capability.
How many O-Ring sizes are included in Kesaria's repair kits?
The 5A and 5B kits each include 382 pieces across 30 assorted sizes (2.9mm to 43.82mm in the 5A kit). The 5C kit includes 386 pieces across 32 assorted sizes, ranging from small to large, at 70 Shore hardness.
What's the difference between the 5A, 5B, and 5C O-Ring repair kits?
All three are assorted-size O-Ring kits organized in a compartmentalized storage case, available in NBR or Silicone. The 5A and 5B kits both hold 382 pieces in 30 sizes, while the 5C kit holds more pieces (386) across a wider size range (32 sizes, small to large). The 5C Silicone kit also adds electrical insulation, anti-static, and food-grade options not described on the 5A/5B product pages.
What applications are Kesaria's O-Ring repair kits suitable for?
Kesaria's O-Ring repair kits are suitable for automotive repairs, plumbing, kitchen and bathroom faucets, hydraulic and pneumatic systems, industrial machinery, HVAC systems, air conditioning systems, and general household or industrial maintenance requiring reliable sealing.