O Ring

High-Quality O-Rings & Sealing Kits：Rubber, Silicone & Viton Options for Every Application

At HomeDIYer, we provide premium O-Rings and O-Ring Kits engineered for durability, precision, and leak-proof performance. Whether you’re repairing a leaky faucet with plumbing O-rings, maintaining industrial machinery with Viton O-rings, or crafting custom seals using rubber or silicone O-rings, our collection ensures the perfect fit and long-lasting reliability.

Choose from a wide range of sizes and materials, including EPDM O-rings for chemical resistance, Nitrile O-rings (Buna-N) for general-purpose sealing, and silicone O-rings for high-temperature applications. Each O-ring kit includes assorted sizes for quick repairs, making them ideal for homeowners, mechanics, and engineers alike.

Backed by a 1-year warranty and expert guidance, our O-ring sealing kits are trusted for plumbing, automotive, hydraulic, and DIY projects. Discover why HomeDIYer O-rings are the go-to solution for reliable sealing and professional results.

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40 products

Showing 1 - 40 of 40 products

Showing 1 - 40 of 40 products
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960Pcs Rubber O - Ring Assortment Set Gasket Automotive Tap Plumbing Seal SAE Kit - HomeDIYer960Pcs Rubber O - Ring Assortment Set Gasket Automotive Tap Plumbing Seal SAE Kit - HomeDIYer
HomeDIYer 960Pcs Rubber O-Ring Assortment Set Gasket Automotive Tap Plumbing Seal SAE Kit
$12.59 USD
No reviews
In stock, 495 units
1mm Cross Section O Rings VMQ Silicone Food Grade 1mm - 48mm ID High Temperature1mm Cross Section O Rings VMQ Silicone Food Grade 1mm - 48mm ID High Temperature
HomeDIYer 1mm Cross Section O Rings VMQ Silicone Food Grade 1mm - 48mm ID High Temperature
From $2.49 USD
No reviews
In stock, 25499 units
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2mm Cross Section O Rings VMQ Silicone Food Grade 1mm-56mm ID High Temperature2mm Cross Section O Rings VMQ Silicone Food Grade 1mm-56mm ID High Temperature
HomeDIYer 2mm Cross Section O Rings VMQ Silicone Food Grade 1mm-56mm ID High Temperature
From $1.20 USD
No reviews
In stock, 24492 units
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150 PCS Copper Crush Washer Gasket Set Flat O Ring Seal Assortment Kit M5 to M22 - HomeDIYer150 PCS Copper Crush Washer Gasket Set Flat O Ring Seal Assortment Kit M5 to M22 - HomeDIYer
HomeDIYer 150 PCS Copper Crush Washer Gasket Set Flat O Ring Seal Assortment Kit M5 to M22
$25.96 USD $29.99 USD
1 review
In stock, 164 units
500Pcs Nylon Flat Washer Assortment Set M2 - M8 Black Sealing Spacer Gasket O Ring - HomeDIYer500Pcs Nylon Flat Washer Assortment Set M2 - M8 Black Sealing Spacer Gasket O Ring - HomeDIYer
HomeDIYer 500Pcs Nylon Flat Washer Assortment Set M2-M8 Black Sealing Spacer Gasket O Ring
$9.39 USD
No reviews
In stock, 66 units
Silicone Rubber O-Rings Metric Food Grade 1.8mm Cross Section 1.8mm - 95mm IDSilicone Rubber O-Rings Metric Food Grade 1.8mm Cross Section 1.8mm - 95mm ID
HomeDIYer Silicone Rubber O-Rings Metric Food Grade 1.8mm Cross Section 1.8mm - 95mm ID
From $2.43 USD
No reviews
In stock, 42998 units
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270pcs O - Ring Sealing Gasket A/C Compressor All Size HNBR O - Rings Assortment Kit - HomeDIYer270pcs O - Ring Sealing Gasket A/C Compressor All Size HNBR O - Rings Assortment Kit - HomeDIYer
HomeDIYer 270pcs O-Ring Sealing Gasket A/C Compressor All Size HNBR O-Rings Assortment Kit
$10.59 USD
1 review
In stock, 105 units
225Pcs O - Rings Ø3 - 22mm Nbr Rubber Sealing Rings Assortment Set O - Ring Sealing Rings - HomeDIYer225Pcs O - Rings Ø3 - 22mm Nbr Rubber Sealing Rings Assortment Set O - Ring Sealing Rings - HomeDIYer
HomeDIYer 225Pcs O-Rings Ø3-22mm Nbr Rubber Sealing Rings Assortment Set O-Ring Sealing Rings
$10.19 USD
No reviews
In stock, 106 units
50x White Silicon Rubber O Rings Food Grade Cross Section 3.1mm OD 9mm-100mm50x White Silicon Rubber O Rings Food Grade Cross Section 3.1mm OD 9mm-100mm
HomeDIYer 50x White Silicon Rubber O Rings Food Grade Cross Section 3.1mm OD 9mm-100mm
From $2.30 USD
No reviews
In stock, 33997 units
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1200x O - Ring Nbr Rubber Sealing Rings Set 24 Sizes Rubber Seals+4x Mounting Hooks - HomeDIYer1200x O - Ring Nbr Rubber Sealing Rings Set 24 Sizes Rubber Seals+4x Mounting Hooks - HomeDIYer
HomeDIYer 1200x O-Ring Nbr Rubber Sealing Rings Set 24 Sizes Rubber Seals+4x Mounting Hooks
$23.52 USD $28.22 USD
No reviews
In stock
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141pcs Faucet Washer Assortment Set Rubber Kitchen Bath Sink Hose Seal Washers - HomeDIYer141pcs Faucet Washer Assortment Set Rubber Kitchen Bath Sink Hose Seal Washers - HomeDIYer
HomeDIYer 141pcs Faucet Washer Assortment Set Rubber Kitchen Bath Sink Hose Seal Washers
$19.98 USD $29.99 USD
No reviews
In stock, 107 units
Save 17%
419 PCS Metric O Ring Assortment, 32 Universal Sizes NBR Buna - N Nitrile Rubber O Ring Kits, O Ring Gasket for Automotive, Plumbing & Faucet Repair (Blue) - HomeDIYer419 PCS Metric O Ring Assortment, 32 Universal Sizes NBR Buna - N Nitrile Rubber O Ring Kits, O Ring Gasket for Automotive, Plumbing & Faucet Repair (Blue) - HomeDIYer
HomeDIYer 419 PCS Metric O Ring Assortment, 32 Universal Sizes NBR Buna-N Nitrile Rubber O Ring Kits, O Ring Gasket for Automotive, Plumbing & Faucet Repair (Blue)
$25.75 USD $30.90 USD
No reviews
In stock
225Pcs NBR Rubber O - Ring Red Ø6 - 20mm Seals O - Ring Washer Pack Set Plumbing Tap - HomeDIYer225Pcs NBR Rubber O - Ring Red Ø6 - 20mm Seals O - Ring Washer Pack Set Plumbing Tap - HomeDIYer
HomeDIYer 225Pcs NBR Rubber O-Ring Red Ø6-20mm Seals O-Ring Washer Pack Set Plumbing Tap
$10.69 USD
No reviews
In stock, 107 units
2mm Cross Section O Rings VMQ Silicone Food Grade 58mm-86mm ID High Temperature2mm Cross Section O Rings VMQ Silicone Food Grade 58mm-86mm ID High Temperature
HomeDIYer 2mm Cross Section O Rings VMQ Silicone Food Grade 58mm-86mm ID High Temperature
From $1.24 USD
No reviews
In stock, 34500 units
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O Ring Assortment Rubber Sealing Rings Set O - Rings Oring Seal 1200 Pieces 6 - 28mm - HomeDIYerO Ring Assortment Rubber Sealing Rings Set O - Rings Oring Seal 1200 Pieces 6 - 28mm - HomeDIYer
HomeDIYer O Ring Assortment Rubber Sealing Rings Set O-Rings Oring Seal 1200 Pieces 6-28mm
$12.39 USD $14.87 USD
No reviews
In stock
800pcs Nitrilerubber O Ring Seal Kit 6mm - 28mm Seals For Water, Oil And Gas Pipes - HomeDIYer800pcs Nitrilerubber O Ring Seal Kit 6mm - 28mm Seals For Water, Oil And Gas Pipes - HomeDIYer
HomeDIYer 800pcs Nitrilerubber O Ring Seal Kit 6mm-28mm Seals For Water, Oil And Gas Pipes
$12.69 USD
No reviews
In stock, 109 units
PU Solid Round Belt Polyurethane Close Loop Drive Belting Wire Dia 2-10mm O RingPU Solid Round Belt Polyurethane Close Loop Drive Belting Wire Dia 2-10mm O Ring
HomeDIYer PU Solid Round Belt Polyurethane Close Loop Drive Belting Wire Dia 2-10mm O Ring
From $4.28 USD
No reviews
In stock, 92000 units
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A2 Stainless Steel Metal O Ring Seamless Solid Circle Wire-φ 3 4 5 6 8 10mm 304A2 Stainless Steel Metal O Ring Seamless Solid Circle Wire-φ 3 4 5 6 8 10mm 304
HomeDIYer A2 Stainless Steel Metal O Ring Seamless Solid Circle Wire-φ 3 4 5 6 8 10mm 304
From $2.00 USD
No reviews
In stock, 22000 units
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7mm Cross Section O-Rings NBR Nitrile Rubber 209mm - 754mm OD Oil Resistant Seals7mm Cross Section O-Rings NBR Nitrile Rubber 209mm - 754mm OD Oil Resistant Seals
HomeDIYer 7mm Cross Section O-Rings NBR Nitrile Rubber 209mm - 754mm OD Oil Resistant Seals
From $6.38 USD
No reviews
In stock, 26000 units
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7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
HomeDIYer 7mm Cross Section O-Rings NBR Nitrile Rubber 414mm - 754mm OD Oil Resistant Seals
From $5.06 USD
No reviews
In stock, 50000 units
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7mm Cross Section O-Rings NBR Nitrile Rubber 30mm - 407mm OD Oil Resistant Seals7mm Cross Section O-Rings NBR Nitrile Rubber 30mm - 407mm OD Oil Resistant Seals
HomeDIYer 7mm Cross Section O-Rings NBR Nitrile Rubber 30mm - 407mm OD Oil Resistant Seals
From $2.76 USD
No reviews
In stock, 49000 units
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5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
HomeDIYer 5mm Cross Section O-Rings NBR Nitrile Rubber 81mm - 420mm OD Oil Resistant Seals
From $4.38 USD
No reviews
In stock, 25000 units
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5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
HomeDIYer 5mm Cross Section O-Rings NBR Nitrile Rubber 200mm - 420mm OD Oil Resistant Seals
From $2.87 USD
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In stock, 50000 units
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5mm Cross Section O-Rings NBR Nitrile Rubber 15mm - 195mm OD Oil Resistant Seals5mm Cross Section O-Rings NBR Nitrile Rubber 15mm - 195mm OD Oil Resistant Seals
HomeDIYer 5mm Cross Section O-Rings NBR Nitrile Rubber 15mm - 195mm OD Oil Resistant Seals
From $2.60 USD
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In stock, 50000 units
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3.5mm Cross Section O-Rings NBR Nitrile Rubber 82mm - 370mm OD Oil Resistant Sea3.5mm Cross Section O-Rings NBR Nitrile Rubber 82mm - 370mm OD Oil Resistant Sea
HomeDIYer 3.5mm Cross Section O-Rings NBR Nitrile Rubber 82mm - 370mm OD Oil Resistant Sea
From $4.42 USD
No reviews
In stock, 26000 units
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3.5mm Cross Section O-Rings NBR Nitrile Rubber 175mm - 370mm OD Oil Resistant Sea3.5mm Cross Section O-Rings NBR Nitrile Rubber 175mm - 370mm OD Oil Resistant Sea
HomeDIYer 3.5mm Cross Section O-Rings NBR Nitrile Rubber 175mm - 370mm OD Oil Resistant Sea
From $2.76 USD
No reviews
In stock, 50000 units
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3.5mm Cross Section O-Rings NBR Nitrile Rubber 12mm - 170mm OD Oil Resistant Sea3.5mm Cross Section O-Rings NBR Nitrile Rubber 12mm - 170mm OD Oil Resistant Sea
HomeDIYer 3.5mm Cross Section O-Rings NBR Nitrile Rubber 12mm - 170mm OD Oil Resistant Sea
From $2.58 USD
No reviews
In stock, 49000 units
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50x White Silicon Rubber O Rings Food Grade Cross Section 3.1mm OD 103mm-305mm50x White Silicon Rubber O Rings Food Grade Cross Section 3.1mm OD 103mm-305mm
HomeDIYer 50x White Silicon Rubber O Rings Food Grade Cross Section 3.1mm OD 103mm-305mm
From $2.97 USD
No reviews
In stock, 22000 units
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50x White Silicon Rubber O Rings Food Grade Cross Section 3.1mm OD 70mm-305mm50x White Silicon Rubber O Rings Food Grade Cross Section 3.1mm OD 70mm-305mm
HomeDIYer 50x White Silicon Rubber O Rings Food Grade Cross Section 3.1mm OD 70mm-305mm
From $2.97 USD
No reviews
In stock, 28500 units
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Metric Nitrile Rubber O Rings Seals 10mm Cross Section 60- 480mm ID O-Ring SealiMetric Nitrile Rubber O Rings Seals 10mm Cross Section 60- 480mm ID O-Ring Seali
HomeDIYer Metric Nitrile Rubber O Rings Seals 10mm Cross Section 60- 480mm ID O-Ring Seali
From $2.25 USD
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Metric Nitrile Rubber NBR O Ring Seals 1.8mm Cross Section 1.8mm-130mm IDMetric Nitrile Rubber NBR O Ring Seals 1.8mm Cross Section 1.8mm-130mm ID
HomeDIYer Metric Nitrile Rubber NBR O Ring Seals 1.8mm Cross Section 1.8mm-130mm ID
From $1.35 USD
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In stock, 4950 units
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Nitrile Rubber NBR O Ring Seals 8.6mm Cross Section 328mm-988mm ID O-Rings Black 1 PcsNitrile Rubber NBR O Ring Seals 8.6mm Cross Section 328mm-988mm ID O-Rings Black 1 Pcs
HomeDIYer Nitrile Rubber NBR O Ring Seals 8.6mm Cross Section 328mm-988mm ID O-Rings Black 1 Pcs
From $2.79 USD
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In stock, 4300 units
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Nitrile Rubber NBR O Ring Seals 6mm Cross Section 532mm-982.5mm ID O-Rings Black 1 PcsNitrile Rubber NBR O Ring Seals 6mm Cross Section 532mm-982.5mm ID O-Rings Black 1 Pcs
HomeDIYer Nitrile Rubber NBR O Ring Seals 6mm Cross Section 532mm-982.5mm ID O-Rings Black 1 Pcs
From $1.45 USD
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In stock, 2400 units
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Nitrile Rubber NBR O Ring Seals 6mm Cross Section 5mm-988mm ID O-Rings Black 1 PcsNitrile Rubber NBR O Ring Seals 6mm Cross Section 5mm-988mm ID O-Rings Black 1 Pcs
HomeDIYer Nitrile Rubber NBR O Ring Seals 6mm Cross Section 5mm-988mm ID O-Rings Black 1 Pcs
From $1.45 USD
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Nitrile Rubber NBR O Ring Seals 8.6mm Cross Section 19mm-982mm ID O-Rings BlackNitrile Rubber NBR O Ring Seals 8.6mm Cross Section 19mm-982mm ID O-Rings Black
HomeDIYer Nitrile Rubber NBR O Ring Seals 8.6mm Cross Section 19mm-982mm ID O-Rings Black
From $1.42 USD
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In stock, 4950 units
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270x O - Ring Assortment Set A/C System R134a Automotive Seal Rubber Gasket Kit - HomeDIYer270x O - Ring Assortment Set A/C System R134a Automotive Seal Rubber Gasket Kit - HomeDIYer
HomeDIYer 270x O-Ring Assortment Set A/C System R134a Automotive Seal Rubber Gasket Kit
$9.99 USD
No reviews
In stock, 110 units
Rubber Grommets Blanking Open Blind Grommet Black Bung Set 295pcs Assorted Size - HomeDIYerRubber Grommets Blanking Open Blind Grommet Black Bung Set 295pcs Assorted Size - HomeDIYer
HomeDIYer Rubber Grommets Blanking Open Blind Grommet Black Bung Set 295pcs Assorted Size
$10.99 USD
No reviews
In stock, 110 units
419pcs Rubber O - Ring Assortment Set Metric Kit Automotive Seal Gasket 32 Sizes - HomeDIYer419pcs Rubber O - Ring Assortment Set Metric Kit Automotive Seal Gasket 32 Sizes - HomeDIYer
HomeDIYer 419pcs Rubber O-Ring Assortment Set Metric Kit Automotive Seal Gasket 32 Sizes
$29.99 USD
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In stock, 110 units
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225pc Universal Rubber O - Ring Assortment Kit Gasket Plumbing Automotive Seal Set - HomeDIYer225pc Universal Rubber O - Ring Assortment Kit Gasket Plumbing Automotive Seal Set - HomeDIYer
HomeDIYer 225pc Universal Rubber O-Ring Assortment Kit Gasket Plumbing Automotive Seal Set
$16.95 USD $19.99 USD
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In stock, 110 units
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270 × Green Rubber O - ring Seal Sealing Rings Nitrile Washer Rubber Set Kit Box - HomeDIYer270 × Green Rubber O - ring Seal Sealing Rings Nitrile Washer Rubber Set Kit Box - HomeDIYer
HomeDIYer 270 × Green Rubber O-ring Seal Sealing Rings Nitrile Washer Rubber Set Kit Box
$21.99 USD $29.99 USD
No reviews
In stock, 110 units

What Are O-Rings and Why Do They Matter?

O-rings are simple yet critical components used to create airtight or watertight seals in countless applications. From plumbing systems and automotive engines to industrial machinery, these small rings prevent leaks, reduce friction, and extend equipment lifespan. At HomeDIYer, we specialize in high-quality O-rings that withstand extreme temperatures, chemicals, and pressure.

Material Max Temp (°F) Chemical Resistance Best Applications
Rubber (Nitrile) 250 Oils, fuels (moderate) General plumbing, household repairs
Silicone 450 Food, medical, UV Food-grade equipment, medical devices
Viton (FKM) 400 Fuels, acids, solvents Automotive fuel lines, aerospace hydraulics
HNBR 300 Ozone, steam, abrasive fluids Heavy-duty industrial machinery

Types of O-Rings for Every Need

Rubber O-Rings

Affordable and flexible, ideal for general-purpose sealing in household repairs.

Silicone O-Rings

Heat-resistant (up to 450°F) and perfect for food-grade or medical applications.

Viton O-Rings

Resistant to fuels, oils, and harsh chemicals—essential for automotive and aerospace industries.

HNBR O-Rings

High-performance option for heavy-duty industrial machinery.

Custom O-Ring Kits

Pre-packaged sets with multiple sizes for DIY enthusiasts and professionals.

How to Choose the Right O-Ring

  • Material Compatibility: Match the O-ring material to your environment (e.g., Viton for fuel lines, silicone for high heat).
  • Size Accuracy: Use our O-ring size chart to measure inner diameter, outer diameter, and cross-sectional thickness.
  • Pressure & Temperature Ratings: Check specifications for maximum load capacity.

Top Applications of O-Rings

  • Plumbing: Seal faucets, toilets, and pipe joints with rubber O-rings.
  • Automotive: Prevent leaks in fuel injectors, AC systems, and engines using Viton O-rings.
  • Industrial Machinery: Ensure reliability in hydraulic systems and pumps with HNBR O-rings.
  • DIY Projects: Create custom seals for 3D printers, aquariums, or outdoor gear.
🔧 Pro Tip: For hydraulic systems subject to wide temperature swings, HNBR O-rings maintain elasticity better than standard nitrile. Always lubricate O-rings with a compatible grease before installation to prevent pinching.

Maintenance Tips for Long-Lasting O-Rings

  • Proper Lubrication: Use O-ring lubricant to reduce wear and improve sealing efficiency.
  • Avoid Harsh Chemicals: Clean with mild soap and water to prevent material degradation.
  • Regular Inspections: Replace O-rings showing cracks, flattening, or discoloration.

Why Choose HomeDIYer O-Rings?

  • Wide Range: Over 500 sizes and materials in stock.
  • Certified Quality: ASTM-compliant manufacturing for consistent performance.
  • Expert Support: Access our O-ring sizing guide and troubleshooting tips.
  • Fast Shipping: Orders ship within 24 hours with free returns.

FAQs About O-Rings

Q: How do I measure an O-ring size?

A: Use our O-ring size chart to determine inner diameter (ID), outer diameter (OD), and cross-section (CS). A digital caliper is the most accurate tool.

Q: Can I reuse O-rings?

A: It depends on the material and wear. Silicone and Viton O-rings can often be reused if undamaged, but for critical applications (fuel systems, brakes), always install new rings.

Q: What’s the difference between rubber and Viton O-rings?

A: Rubber (nitrile) is cost-effective for general use with oils and water; Viton excels in chemical resistance for automotive/industrial settings where fuels, acids, or solvents are present.

Specialized O-Ring Solutions

  • O-Ring Kits: Perfect for mechanics and hobbyists. Our Harbor Freight O-ring kit includes 300+ pieces (compatible).
  • High-Temperature Seals: Silicone O-rings handle extreme heat in grills and engines.
  • Chemical-Resistant Seals: Viton O-rings protect against oil, gasoline, and solvents.

Troubleshooting Common O-Ring Issues

  • Leaks After Installation: Check for improper sizing or material incompatibility.
  • Swelling or Cracking: Replace with a chemically compatible O-ring (e.g., Viton for fuel exposure).
  • Compression Set: Avoid over-tightening; use a lubricant to ensure even pressure distribution.
📦 Bulk buyer tip: Our assorted O-ring kits are organized in labeled cases – perfect for workshops that service a variety of equipment. Kits include the most common AS568 dash sizes from -006 to -222.

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