Cork Sheet and Rubberised Cork: Gaskets, Pads and Insulation

30 October, 2026 | Admin

Cork sheet and rubberised cork gasket sheet Saudi Arabia

Short answer: Cork sheet is made from natural cork
granules bound together, and rubberised cork combines cork with
synthetic rubber for better strength and sealing. Both are compressible,
resilient and resistant to oils and water. They are used as gaskets,
vibration and sound dampers, thermal insulation and expansion joint
filler.

Table of Contents

What makes cork useful

Cork is made of tiny closed cells filled with air, which makes it
light, compressible and springy. It recovers when pressure is removed,
resists oils and many fluids, and dampens vibration and sound. Unlike
many rubbers, cork does not extrude out from under a joint easily, so it
stays in place under compression.

Free engineering tools

Gasket size chart — Find the ASME B16.21 gasket ID and OD for your flange size and class
Plastic weight calculator — Work out the weight of Cork Sheet and Rubberised Cork sheets, rods and tubes in kg

Request a quote for this product →

Cork vs rubberised cork

Cork sheet (cork with a binder): soft, compressible
and economical. Good for low-pressure gaskets and for cushioning.
Rubberised cork (cork-rubber): cork bound with
synthetic rubber such as neoprene or NBR. Stronger, more flexible and
better at sealing oils, fuels and water. Common for engine, gearbox and
pump gaskets.

Key properties

compressible and resilient
resists oil, fuel and many chemicals (depends on binder)
absorbs vibration and noise
good thermal insulation
easy to cut

Limits

lower strength than rubber or fibre sheets
not suitable for high pressure or very high temperature
can absorb moisture depending on the grade
poor against strong acids and some solvents

Typical uses

Application	Why cork
Engine, gearbox and pump gaskets	Oil resistance and conformability
Vibration pads under equipment	Damping
Expansion joints in concrete and floors	Compressible, recovers
Thermal insulation pads	Low conductivity
Sound isolation	Absorbs vibration

Choosing the right grade

Fluid: oil, fuel or water.
Pressure and bolt load: cork gaskets suit low
load.
Thickness: thicker conforms more but compresses
more.
Binder: neoprene or NBR binder for oil; check the
datasheet.
Form: sheet, roll or cut gasket.

Cutting and fitting

Cork cuts easily with a knife, die or punch. Cut bolt holes cleanly
to avoid tearing, and tighten bolts gradually and evenly. Avoid
over-tightening, since cork can crush. Do not reuse a compressed cork
gasket.

Common mistakes to avoid

using cork for high-pressure joints
over-tightening, crushing the gasket
storing sheets in damp conditions
choosing plain cork for oil service where rubberised cork is
better
ordering a thickness that cannot compress enough to seal

Questions to ask your
supplier

What binder is used? What are the temperature and compression limits?
What sheet sizes and thicknesses are available? Can gaskets be cut to my
drawing? Is a datasheet available?

Diode Trading EST supplies sealing materials across Saudi Arabia, and
every order ships with a Material Test Certificate. request a quote

Getting a quotation

Send a short brief with your sizes, quantity, and delivery location
in Saudi Arabia, and we will reply with availability, lead time and a
quotation. If you are unsure of the right grade, describe the working
conditions and we will help you choose.

Typical thickness and size
guide

Thin cork sheet suits fine, machined flanges, while thicker sheet is
used for vibration pads and expansion joints. Sheets are normally
supplied in standard sizes and cut to your shape. For expansion joints
in concrete, choose a thickness equal to the joint width and make sure
the cork is protected from water if the grade is not
water-resistant.

Why cork is still used today

Despite newer materials, cork-rubber remains popular for engine
covers, gearbox inspection plates and similar joints because it seals at
low bolt load, does not harden quickly in oil and is easy to cut on
site. It is a practical, economical choice for low-pressure oil
joints.

FAQ

What is rubberised cork? Cork granules bound with
synthetic rubber, giving more strength and oil resistance.

Is cork good for oil gaskets? Rubberised cork is
commonly used for oil joints at low pressure.

Can cork be used for vibration isolation? Yes, it
dampens vibration and noise.

Can cork gaskets be reused? No. Replace them after
each opening.

Products related to this article

Diode Trading EST supplies these Rubber Sheets, Gaskets & Seals from stock in Dammam, with delivery across Saudi Arabia and the GCC.

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