Seals, Gaskets & Rubber Mouldings

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Seals and moulded elastomer parts keep media in and contamination out. The suppliers below produce O-rings and moulded seals, flat and profile gaskets, rotary shaft seals, and technical rubber parts made by compression, transfer, or injection moulding and by extrusion.

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    What seal and rubber moulding suppliers provide

    Suppliers in this category produce elastomer parts as a semi-finished product. The scope covers O-rings and moulded seals, rotary shaft seals, flat gaskets cut or moulded from sheet, extruded profiles and cord, bellows and diaphragms, and rubber-to-metal bonded components. Materials range from NBR, EPDM, and FKM through silicone to specialty compounds selected for temperature, media, and ageing resistance, and many suppliers mix their own compounds or work to a customer specification. Work typically includes tooling, moulding, deflashing, and batch testing. Core competence lies in the compound-to-medium match and in reproducible dimensional stability across batches. Compare which compounds a supplier formulates in-house, which approvals they hold for drinking water, food contact, or pharmaceutical use, and whether they support material selection at the design stage.

    Relevant standards

    O-ring dimensions and tolerances are defined in ISO 3601-1, with quality acceptance criteria in ISO 3601-3. Rotary shaft seals are covered by ISO 6194. Tolerances for moulded rubber parts follow ISO 3302-1, and elastomer compound designation is set out in ISO 1629. Suppliers commonly certify quality management to ISO 9001, with IATF 16949 usual in automotive supply.

    Frequently asked questions

    How does this differ from thermoplastic elastomers?
    Thermoplastic Elastomers (TPE) covers thermoplastic materials that can be remelted. This category covers vulcanised rubber parts and finished sealing elements.