Cork Gaskets | Cork Seals | PTM Gaskets & Sealing

Cork Gaskets Manufacturing Experts

Cork gaskets and cork rubber gaskets are suitable for industrial applications because of their ability to withstand moisture, extreme temperatures and pressure without degrading.

They may also offer sound deadening and anti-vibration in some industrial settings, adding to their versatility and appeal.

At PTM, we stock several cork gasket types for many industries, including:

Automotive engineering
Transformers and generators
Power supply applications

Common use cases include electrical switchgear, covers and lids, valve covers, sumps, crankcase covers, inspection doors, and anti-vibration.

Our Range of Cork Gaskets

Here is a list of our cork gaskets of different grades and sealing applications. These are available as natural cork, resin-bonded, or rubber bonded. Click on the links below to download a data sheet on the different grades.

Statite™ Oil Paper

Statite oil paper is a type of paper that is resistant to oil and fuels. As such, it has similar properties as rubber, making it ideal for automotive applications and water pumps. The material has a tensile strength of 13.0 N/mm2 and a 12 to 16% compressibility. Oil weight increase is less than 15% and thickness increase is less than 5%.

Data Sheet

Nitrile-bonded Cork Gaskets

Nitrile-bonded cork is a potent, general-purpose gasket material with a speckled appearance, suitable for a wide variety of applications, including heavy plant machinery, valve covers, and oil pumps. It has a tensile strength of 1.38Mpa and a compressibility of 35 to 45% at pressures of 400 PSI. Recovery after compression is 75% and volume changes after immersion in oils are -10 to +5% for some compounds..

Data Sheet

Nitrile Bonded Cork

The physical characteristics along with oil and fuel resistance make this a qualified material for automotive and industrial gaskets.

Data Sheet

Neoprene-bonded Cork Gaskets

Neoprene rubber cork gaskets are highly compressible, making them ideal for situations involving low- to medium-bolt pressures. Neoprene-bonded cork rubber has a tensile strength of 17.5 PSI or 250 kg/ sq. cm and a compressibility of 25 to 40% at 44 PSI. Recovery is around 75 per cent with minimal cracking, making it a sensible choice as a gasket material.

Data Sheet

Flexoid™ Gasket Paper

Flexoid gasket paper is affordable and has excellent oil and fuel resistance. Tensile strength is 13.79 Mn/ Sq. m and an oil weight increase of 15%. Industrial users typically choose this type of paper for its affordability.

Data Sheet

Firm-Grade NBR Cork Gaskets

Firm-grade NPR cork gaskets are manufactured to be stiffer than their regular counterparts while still offering the exceptional vibration isolation of regular cork. We recommend this type of cork for medium- to high bolt pressures because it is flexible and resilient. NPR cork gaskets supplied by us have a tensile strength of 15 kg/cm in the transversal direction, and 22.5 kg/cm in the longitudinal direction, compressing between 20 and 35% under 400 PSI. Compression does not result in cracks in the material, as it does in some products. This makes the rubber/cork material suitable for automotive and industrial gaskets.

Data Sheet

As with all materials, it is recommended that the style is tested for suitability as grades do vary.
We are happy to advise on any application, but final responsibility lies with the customer.

Get Gasket Material Today

If you require gaskets for industrial applications, contact our sales office. Our sales team can direct you towards the correct product for your needs. We are more than happy to advise on a variety of applications.

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