Rubber Moulding

Our significant expertise in rubber moulding has culminated in long standing relationships with customers and we provide custom moulded rubber components in most rubber materials either to a drawing or sample (reverse engineering).

We supply parts in commercial grade materials such as Neoprene, EPDM, Natural, Nitrile and Silicone. But also offer moulded components in flame retardant, chemical resistant, military grade, WRAS, FDA, British Standard – Natural rubber to BS1154, Nitriles to BS2751, Neoprene to BS2752 and other major standards such as EN45545-2, BS6853 and LUL section 12 all specifically designed for the rail industry, please visit the rail sector section of our website.

Tooling (mould) is manufactured to suit the application, from a single impression for prototype/small batch production, to multicavity tools designed for long running schedules of rubber mouldings.

For more information or advice

call us today on +44 (0) 121 773 8494

Reverse Engineering & Material Selection for Rubber Moulding

If you are looking to replicate an existing part, CB Frost can work with you to reverse engineer rubber moulds, offering like-for-like or in alternative materials for rubber moulding. We understand material selection can be critical for the working applications and our technical support team will be able to help.

Overseas Sourcing Of Rubber Moulded Components

In some instances, it is worth considering overseas production, this could be due to cost or quantity involved. CB Frost have a reliable and trusted partnerships with several suppliers built up over a 10-year period and manage the process from start to finish.


Examples of the range of moulded rubber components manufactured are as follows:

  • Moulded Rubber Cleat Seals

  • Moulded General Rubber Seals

  • Moulded Rubber Drain Valve Seals

  • Moulded Rubber Gaskets

  • Moulded Rubber Pipe Seals

  • Moulded Rubber Washer Seals

The Key Advantages To Injection Moulding

Injection moulding is a commonly used process as it is ideally suited to producing small and large parts, as well as very intricate rubber mouldings. Some of the biggest benefits of this process include:

  • Parts can be produced with much quicker cycle times than through other moulding processes.

  • There is little rubber waste as only the required amount of material is injected into the mould.

  • The raw rubber is preheated to its molten form before it is fed into the cavities of the mould, so viscosity of the material is decreased and it flows more effectively to fill the mould evenly.

  • The process produces very consistent results, so it is very beneficial for creating reliable parts. 

  • There is rarely a need for finishing once the rubber mouldings are removed from the mould cavities - there's no need to trim down edges or remove excess material.

  • Injection moulding can be an automated process, so parts can be mass-produced effectively.

How does compression

Moulding work?

The compression moulding manufacturing process involves placing the raw compound into the moulding cavities of a pre-heated tool (see image below). The desired shape and size of the component will affect the shape of the tool cavity, as well as how much moulding material will be required. In order to ensure that the correct amount of material is used, it is weighed before being placed into the cavities of the moulding tool. Once the correct quantities of the raw material have been placed in the tool cavities, the mould will be closed, and the compression moulding process can take place (see image below).

Heat and pressure are applied to the moulding, allowing the raw materials to form the desired shape, and the rubber mould remains closed until the compression mouldings have cured (set). The amount of time needed to complete the moulding process depends on the type of material being used, the temperature that it is moulded at, and the size of the component.


At CB Frost we have vast experience in creating rubber mouldings to a set specification for a range of industries. Our team are able to advise customers as to the best type of material to utilise for a particular project, and we aim to meet fast lead times at all times. For further information, please contact our team on +44 (0)121 773 8494.

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Office Hours

Monday to Thursday
8.00am to 4.35pm
Friday - 8.00am to 1.00pm

Get in touch

Unit C1, Matrix Point, Mainstream Way, Nechells, Birmingham: UK: B7 4SN