Custom Moulded Silicone Rubber O Rings ODM OEM Service Flexible Sealing

These silicone rubber O rings are produced to your drawing, sample or groove measurement rather than sold from a fixed size list. Send an inner diameter, cross section, hardness and colour requirement, and we mould the ring in a 20 to 80 Shore A silicone compound with tooling built in house. Because silicone keeps its elasticity from -60 C to +200 C and can be cured to FDA or LFGB food contact grade, the same O ring design serves food machinery, medical devices, electronics housings and outdoor lighting at the same time.

Application Scenarios

• Food and beverage machinery: filler nozzles, mixing shafts, tank covers and pump housings where an FDA or LFGB grade silicone seal is required.
• Medical and laboratory equipment: diagnostic housings, sample ports, sterilisation trays and tubing connectors that must survive repeated autoclave cycles.
• Electronics and lighting: LED housing gaskets, control box covers, sensor windows and outdoor luminaires needing UV and water resistance.
• Household appliances: coffee machine boilers, water purifier heads, steam irons and pressure cooker seals in high temperature wet service.
• Industrial and pneumatic: valve seats, cylinder caps and vacuum line joints that need low compression set and clean release.
• OEM and ODM projects: customers who need a private mould, custom colour, laser marking or retail packaging under their own brand.

Quick Parameter Table

Quality Assurance

• Drawing review before tooling: our engineer checks groove width, compression rate and tolerance stack against your drawing and confirms back in writing before the mould is cut.
• Raw material control: each silicone compound batch is verified for hardness, tensile strength, elongation and specific gravity, with the supplier certificate filed under the batch number.
• First article approval: a dimensional report with cross section, inner and outer diameter measurements is issued for your sign-off before mass production.
• In-process and final inspection: hourly sampling during the run plus AQL 1.0 final inspection on dimension, flash, tearing and colour match.
• Post-curing: optional 200 C post-cure to eliminate volatile residue for medical, food and optical applications.
• Third-party testing: FDA 21 CFR 177.2600, LFGB, RoHS, REACH, PAHS and ISO 10993 reports can be arranged through SGS or TUV on request.
• Quality system: ISO 9001:2015 certified production with documented corrective action for any confirmed non-conformity.

Packaging Standards

• Inner packing: each size or model sealed in a clear PE bag with part number label, protected by a poly bag liner in the carton.
• Outer carton: five-layer export corrugated carton printed with part number, quantity, gross and net weight, and your shipping marks.
• Protection: edge protectors and inner board prevent crushing; desiccant sachets added for sea freight and humid destinations.
• Clean packaging option: double bagged and packed in a clean room for medical and food grade orders.
• Custom packaging: colour box, blister card, hang tag, barcode and instruction sheet produced from your artwork; MOQ applies.
• Neutral shipping: unmarked cartons and no logo printing for distributors selling under their own brand.

After-Sales Service

• Response time: drawing feedback within 12 working hours, claims acknowledged within 24 working hours.
• Free samples: stock sizes or a trial run from your mould supplied free of charge for evaluation, freight collected.
• Tooling ownership: the mould belongs to you and is stored free of charge for two years, so repeat orders need no new tooling cost.
• Replacement policy: any confirmed dimensional or material defect replaced free of charge, shipped by express at our cost.
• Technical support: advice on compression set, groove design and material grade when your application involves steam, oil, food contact or low temperature.
• Warranty: 12 months from shipment against manufacturing defects under normal storage and installation conditions.

FAQ

Q: Can you produce from a sample instead of a drawing?
A: Yes. Send the sample and we will reverse measure it, then confirm the drawing and tolerance with you before tooling.

Q: What is the tooling cost and lead time?
A: Prototype tooling takes 7 to 10 days and is quoted against your drawing; the cost depends on cavity number and ring diameter.

Q: What is the minimum order quantity?
A: 500 pieces per size for custom moulded rings; lower quantities accepted for samples and trial orders.

Q: Can you supply food or medical grade silicone?
A: Yes, FDA 21 CFR 177.2600, LFGB and ISO 10993 compliant compounds are available with test reports.

Q: How do you match a colour?
A: Send a Pantone code or a physical sample; we make a colour chip for approval before production.

Q: Can the rings be printed or laser marked?
A: Yes, laser marking and pad printing are available for part numbers and brand identification.

Send your drawing, sample photo or groove dimensions with the working temperature and media, and we will reply with a tooling and unit price quotation within one working day.