Odd sizes
Housings designed around a size no catalogue stocks.
Gaskets and seals · O-rings
O-rings.
The simplest seal there is, and the one most often specified wrongly. We supply custom O-rings, and we'll tell you when a standard one would do.
The detail
Start with the groove
Most O-ring problems are groove problems: too much squeeze, too little, a groove that's too full when the ring swells in fluid. Before we quote a ring, we like to see the housing.
Where the housing is right and a standard size fits, buy standard. Where it isn't, or the compound, colour or paperwork needs to be specific, we mould custom rings — usually by compression, occasionally by injection at very high volume.
Where it fits
Why customers come to us for O-rings
Specific compounds
Food-contact silicone, fluorosilicone for fuels, EPDM for water and steam.
Documented material
A batch record showing exactly what each ring is made from.
How we run it
How an O-ring order runs
Groove and fluid review
We check squeeze, stretch and fill against the compound.
Compound and colour
Chosen for the environment, coloured for identification if helpful.
Mould and deflash
Multi-cavity compression, cryogenic deflash for a clean parting line.
Measure and pack
Size checked per batch, counted and bagged with the batch label.
To quote it
To quote it
Inside diameter and section
Or groove dimensions.
Fluid and temperature
What it seals and how hot it gets.
Static or dynamic
A moving seal needs a different approach.
Quantity and colour
Per batch and per year.
Questions
What people usually ask.
Do you stock standard O-rings?
No. We're a manufacturer, not a distributor. For standard sizes in standard compounds, a distributor is usually the better route.
Can you make spliced O-rings for very large diameters?
Yes, from extruded cord joined into a ring. See silicone extrusion.
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Back to the overviewDesigned and developed in the UK. UK moulding capability, with some higher-volume production placed with trusted partners where that's the right commercial answer.
Get in touch
Tell us the part, the volume, and the timeline.
Rough annual volume, target unit price, and any deadlines. That's enough to work out whether compression, LSR injection or something else is the right tool.
Real people, a real workshop
You deal with the people who make it.
No call centre and no middlemen. When you contact TCI Products, you speak to the team who design, build and check your mould.
- A real Warwickshire workshopUnit 15, Waterloo Park, Bidford-on-Avon, Alcester B50 4JG.
- Real people on the phoneCall the team on 01789 224228, Monday to Friday.
- The same team on every jobDesign, production and aftercare come from the people you see here.
- Part of TCI GroupFive specialist brands, one engineering team. Visit TCI Group.
Thomas LaneManaging Director
George PrestonDesign & Project Manager
Kelly BallingerHead of Partnerships
Jim AndertonProduction Manager
TheodoreEmployee Welfare