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An A-Z of all our material forms

An A-Z of all our material forms

What’s in a name? Well, in the case of Martin’s Rubber, far more than ours suggests. You see, we specialise in a wide array of high performance elastomers – not just rubber. From sheet moulding compounds to insertion rubber sheeting materials, we have it covered. Here, we give you an A-Z rundown of some of our most in-demand material forms.



Adhesives consist of a range of materials suitable for bonding similar or dissimilar materials together. With different mechanical and chemical resistance properties, careful selection and preparation is essential for consistent success.


A billet can be made out of solid rubber or engineering plastic and is typically a tube or bar shape. Billets are suitable for machining on CNC or manual equipment.

EMI-RFI Sheeting

EMI-RFI sheeting is used to provide shielding of delicate electronic components contained in enclosures where access is required and a gasket forms the seal. The purpose is to act as a continuous electrical interface across the joints of gaskets, either by having metal fulfilments inserted in the material, or metal particles in a rubber binding matrix.

Extruding compound

Our extruding compounds are similar in their uncured form to moulding materials but different compounding is required for the extrusion process. The success of which is dependent on using high quality materials.

Insertion sheeting

Insertion rubber sheeting is fully cured solid rubber sheeting that consist of at least one layer of fabric that is “inserted” within the cross section of the material to give a higher tear strength material. Conveyor belting, gasket insertion and flat ‘diaphragm sheeting’ are all made this way.

Moulding compound

Our sheet moulding compound form is made up of rubber mixes or recipes in their uncured form. It often comes with the cure system already added and in a position where it is ready for the thermoset reaction to take place when processed correctly.

Sealant – Mastic

Mastic sealant forms can be used to fill gaps, as well as being used for adhesive purposes. Consistent success can only be achieved through careful consideration of the differing mechanical and chemical resistance properties at hand.

Self-adhesive backing

Self-adhesive backing consists of a range of materials that are suitable for bonding similar and dissimilar materials with different mechanical and chemical resistance properties. They come in a thin layer on a backing film and can be applied to a wide variety of materials. Care must be taken when considering application to solid rubbers, as the process waxes present can migrate to the surface of the rubber over time, breaking down the bond of the self-adhesive backing.

Solid extrusion

This is made out of a solid rubber and is formed by pressing uncured material through a die, which results in a profile being produced. It will then be cured in an autoclave or infrared chamber, depending on what the material is. Formers or jigs may have to be used until the shape is fully cured.

Solid sheeting

Solid sheeting is available in a range of widths, lengths and materials. Our solid sheeting is made purely out of cured solid rubber. The solid sheeting may have either a smooth ‘plate’ finish or a ‘cloth’ finish.

Sponge extrusion

A sponge rubber profile is created through pressing uncured material through a die. The profile is then cured in an autoclave or infrared chamber, depending on what material has been used. Formers or jigs may have to be used until the shape is fully cured.

Sponge sheeting

Our sponge sheeting is fully cured and manufactured in such a way as to have a foaming agent form bubbles during the process. If the resulting cells are sealed from each other this ‘closed cell’ construction will seal. If they interconnect an ‘open cell’ or ‘reticulated’ foam product results, which will pass liquids and gasses.

For more information about all the material forms we supply at Martin’s Rubber, please speak to one of our experts on +44 23 8022 6330 or email us at [email protected].

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