Silicone O-rings
Silicone O-Rings
Shop silicone O-rings for replacement, repair, equipment maintenance, and flexible static sealing applications. Choose the exact size by inside diameter and cross section, then select the hardness you need.
Typical temperature-55 to +200 °CTypical for the family; the supplied compound decides the usable range.
Good for
- Dry heat and deep cold in static seals
- Air, ozone and weathering
- Clean, low-odour applications (compound dependent)
Avoid / check
- Abrasion, tear and dynamic motion
- Fuels, most oils and steam
- High gas permeability
- Listings
- 4,852
- Priced
- per pack
- Units
- mm + in
Most-used sizes
- 6 × 1.50 mm
- 8 × 2.00 mm
- 10 × 2.00 mm
- 12 × 2.00 mm
- 14 × 2.00 mm
- 15 × 2.00 mm
- -010 6.07 × 1.78
- -012 9.25 × 1.78
- -014 12.42 × 1.78
- -016 15.60 × 1.78
- -018 18.77 × 1.78
- -020 21.95 × 1.78
| Size (ID × CS) | Hardness | Size ref. | Smallest pack | Status | Action |
|---|---|---|---|---|---|
| 5.00 × 1.00 mm0.197 × 0.039 in | 70A Silicone | JIS B 2401 SS050 | $4.99 / 10 pcs $0.50 / pc | Available to order | |
| 88.00 × 1.50 mm3.465 × 0.059 in | 70A Silicone | — | $18.41 / 10 pcs $1.84 / pc | Available to order | |
| 44.00 × 2.00 mm1.732 × 0.079 in | 70A Silicone | — | $8.69 / 10 pcs $0.87 / pc | Available to order | |
| 30.15 × 2.40 mm1.187 × 0.094 in | 70A Silicone | — | $6.59 / 10 pcs $0.66 / pc | Available to order | |
| 16.00 × 3.50 mm0.630 × 0.138 in | 70A Silicone | — | $5.18 / 10 pcs $0.52 / pc | Available to order | |
| 16.00 × 1.50 mm0.630 × 0.059 in | 70A Silicone | — | $4.99 / 10 pcs $0.50 / pc | Available to order | |
| 16.00 × 1.25 mm0.630 × 0.049 in | 70A Silicone | — | $4.99 / 10 pcs $0.50 / pc | Available to order | |
| 12.30 × 2.40 mm0.484 × 0.094 in | 70A Silicone | — | $4.99 / 10 pcs $0.50 / pc | Available to order | |
| 12.00 × 1.00 mm0.472 × 0.039 in | 70A Silicone | JIS B 2401 SS120 | $4.99 / 10 pcs $0.50 / pc | Available to order | |
| 9.00 × 1.50 mm0.354 × 0.059 in | 70A Silicone | — | $4.99 / 10 pcs $0.50 / pc | Available to order | |
| 8.00 × 1.50 mm0.315 × 0.059 in | 70A Silicone | — | $4.99 / 10 pcs $0.50 / pc | Available to order | |
| 7.90 × 1.25 mm0.311 × 0.049 in | 70A Silicone | — | $4.99 / 10 pcs $0.50 / pc | Available to order | |
| 7.06 × 1.17 mm0.278 × 0.046 in | 70A Silicone | — | $4.99 / 10 pcs $0.50 / pc | Available to order | |
| 7.00 × 1.50 mm0.276 × 0.059 in | 70A Silicone | — | $4.99 / 10 pcs $0.50 / pc | Available to order | |
| 4.50 × 1.80 mm0.177 × 0.071 in | 70A Silicone | — | $4.99 / 10 pcs $0.50 / pc | Available to order | |
| 3.40 × 1.90 mm0.134 × 0.075 in | 70A Silicone | — | $4.99 / 10 pcs $0.50 / pc | Available to order | |
| 984.00 × 3.00 mm38.740 × 0.118 in | 70A Silicone | — | $330.86 / 10 pcs $33.09 / pc | Available to order | |
| 982.00 × 3.00 mm38.661 × 0.118 in | 70A Silicone | — | $330.86 / 10 pcs $33.09 / pc | Available to order | |
| 953.00 × 10.00 mm37.520 × 0.394 in | 70A Silicone | — | $1,017.45 / 10 pcs $101.75 / pc | Available to order | |
| 953.00 × 4.00 mm37.520 × 0.157 in | 70A Silicone | — | $644.58 / 10 pcs $64.46 / pc | Available to order | |
| 952.00 × 4.00 mm37.480 × 0.157 in | 70A Silicone | — | $641.73 / 10 pcs $64.17 / pc | Available to order | |
| 951.00 × 10.00 mm37.441 × 0.394 in | 70A Silicone | — | $1,017.45 / 10 pcs $101.75 / pc | Available to order | |
| 951.00 × 4.00 mm37.441 × 0.157 in | 70A Silicone | — | $641.73 / 10 pcs $64.17 / pc | Available to order | |
| 950.00 × 10.00 mm37.402 × 0.394 in | 70A Silicone | — | $1,017.45 / 10 pcs $101.75 / pc | Available to order | |
| 950.00 × 4.00 mm37.402 × 0.157 in | 70A Silicone | — | $641.73 / 10 pcs $64.17 / pc | Available to order | |
| 949.00 × 10.00 mm37.362 × 0.394 in | 70A Silicone | — | $1,013.96 / 10 pcs $101.40 / pc | Available to order | |
| 949.00 × 4.00 mm37.362 × 0.157 in | 70A Silicone | — | $638.88 / 10 pcs $63.89 / pc | Available to order | |
| 948.00 × 10.00 mm37.323 × 0.394 in | 70A Silicone | — | $1,013.96 / 10 pcs $101.40 / pc | Available to order | |
| 948.00 × 4.00 mm37.323 × 0.157 in | 70A Silicone | — | $638.88 / 10 pcs $63.89 / pc | Available to order | |
| 947.00 × 10.00 mm37.283 × 0.394 in | 70A Silicone | — | $1,013.96 / 10 pcs $101.40 / pc | Available to order | |
| 947.00 × 4.00 mm37.283 × 0.157 in | 70A Silicone | — | $636.02 / 10 pcs $63.60 / pc | Available to order | |
| 929.00 × 8.40 mm36.575 × 0.331 in | 70A Silicone | — | $590.99 / 10 pcs $59.10 / pc | Available to order | |
| 925.00 × 8.00 mm36.417 × 0.315 in | 70A Silicone | — | $899.88 / 10 pcs $89.99 / pc | Available to order | |
| 924.00 × 8.00 mm36.378 × 0.315 in | 70A Silicone | — | $899.88 / 10 pcs $89.99 / pc | Available to order | |
| 923.00 × 8.00 mm36.339 × 0.315 in | 70A Silicone | — | $897.13 / 10 pcs $89.71 / pc | Available to order | |
| 922.00 × 8.00 mm36.299 × 0.315 in | 70A Silicone | — | $897.13 / 10 pcs $89.71 / pc | Available to order | |
| 921.00 × 8.00 mm36.260 × 0.315 in | 70A Silicone | — | $894.38 / 10 pcs $89.44 / pc | Available to order | |
| 920.00 × 8.00 mm36.220 × 0.315 in | 70A Silicone | — | $894.38 / 10 pcs $89.44 / pc | Available to order | |
| 919.00 × 8.00 mm36.181 × 0.315 in | 70A Silicone | — | $891.63 / 10 pcs $89.16 / pc | Available to order | |
| 911.00 × 4.00 mm35.866 × 0.157 in | 70A Silicone | — | $599.15 / 10 pcs $59.92 / pc | Available to order | |
| 910.00 × 4.00 mm35.827 × 0.157 in | 70A Silicone | — | $599.15 / 10 pcs $59.92 / pc | Available to order | |
| 909.00 × 4.00 mm35.787 × 0.157 in | 70A Silicone | — | $596.29 / 10 pcs $59.63 / pc | Available to order | |
| 908.00 × 4.00 mm35.748 × 0.157 in | 70A Silicone | — | $596.29 / 10 pcs $59.63 / pc | Available to order | |
| 907.00 × 4.00 mm35.709 × 0.157 in | 70A Silicone | — | $593.42 / 10 pcs $59.34 / pc | Available to order | |
| 906.00 × 4.00 mm35.669 × 0.157 in | 70A Silicone | — | $593.42 / 10 pcs $59.34 / pc | Available to order | |
| 905.00 × 4.00 mm35.630 × 0.157 in | 70A Silicone | — | $590.55 / 10 pcs $59.06 / pc | Available to order | |
| 883.00 × 8.40 mm34.764 × 0.331 in | 70A Silicone | — | $688.21 / 10 pcs $68.82 / pc | Available to order | |
| 882.00 × 8.40 mm34.724 × 0.331 in | 70A Silicone | — | $688.21 / 10 pcs $68.82 / pc | Available to order |
Can’t find your size, material or quantity? Send the dimensions, an old part or a drawing.Request a quote
Ordering Silicone O-rings
Listed sizes are available in small packs when offered. For an unlisted size, special hardness or color, drawing-based request, or larger quantity, use the Custom O-Ring Quote.
Browse Silicone 70A sizes by inside diameter: 0–40 mm, 40–80 mm, 80–180 mm, 180–350 mm, and 350+ mm. Match the compound to the actual fluid, temperature, and wear conditions.
Silicone (VMQ) is often considered for flexible static seals and broad temperature service, but compatibility with oils, fuels, steam, cleaners, and other media depends on the specific compound. Do not choose silicone by temperature range alone.
For repeated motion, abrasive contact, sharp grooves, or high tear loads, review wear and tear resistance alongside hardness and compression behavior. Confirm the actual medium and seal motion before choosing silicone over EPDM or FKM.
About Silicone (VMQ) O-rings
Silicone, also called VMQ, has the widest temperature span of the common O-ring families and is most at home in static seals. It is usually chosen for dry heat and deep cold, for air, ozone and weathering, and for clean, low-odour applications where the compound suits the job. It is a poor match for abrasion, motion, fuels, most oils and steam.
Where silicone (VMQ) is a good starting point
Silicone is a good starting point for static seals that see dry heat or deep cold, for air, ozone and weathering, and for clean, low-odour applications, subject to the compound. It suits static joints in air where the seal is not rubbed or moved and stays clear of oil, fuel and steam. Its high gas permeability also matters where a gas must be held tight.
When to consider another material
- Abrasion, tear or a moving seal: consider NBR or FKM. NBR and FKM are the usual families for hydraulic and pneumatic service where seals move and see pressure; choose between them by medium and temperature.
- Fuels or most oils: consider NBR or FKM. NBR covers mineral oils and many fuels at moderate temperature, and FKM covers fuels, oils and lubricants at elevated temperature.
- Steam or hot water: consider EPDM. EPDM is the water-and-weather family and a good starting point for hot water, steam and glycol coolants.
Silicone (VMQ) O-ring questions
- What temperature range does silicone (VMQ) cover?
- As a family, silicone (VMQ) is typically used from −55 to +200 °C (−67 to +392 °F). The usable limits depend on the compound and on how long the seal stays at temperature, so check the compound before running near either end of the range.
- Which hardness should I choose?
- This collection carries silicone (VMQ) in 70 Shore A, the usual general-purpose hardness. For another hardness, request a custom quote. Engineer Pro checks compression, stretch and extrusion for your gland.
- How do I check silicone (VMQ) against my fluid?
- Look up your exact medium in the chemical compatibility check, which rates silicone (VMQ) against about two thousand media. The rating is a screening step; for critical service, confirm the specific compound.