Cork Sheets

Conformable cork-rubber jointing

Cork-rubber composite sheet that conforms under low clamping load to seal oils and fuels on covers, pans and transformer joints.

High compressibility conforms to thin, flexible covers
Good resistance to oils, fuels and lubricants
Recovers well after compression cycles
Seals reliably at low bolt load
Easy to cut and handle on the bench

Temperature: -40°C to +120°C
Pressure: Up to 7 bar (low-pressure duty)
pH range: 4 – 9

Cork-rubber composite sheet with a die-cut gearbox cover gasket — Gasket Rolls & SheetsREF · cork-sheet

Technical DatasheetSPEC

The numbers, on the record

Every figure below is the specification we hold ourselves to — material, service envelope, media compatibility and conformance. Download it as a standalone document for your dossier.

SealGuard

Technical Datasheet

Doc No.: DS-CORK-SHEET
Revision: Rev. A
Issue: 2026-Q3
Class: Gasket Rolls & Sheets

Cork Sheets

Conformable cork-rubber jointing

01

Material & Construction

Granulated cork bound in a nitrile (NBR) rubber matrix

02

Service Envelope

Temperature range	-40°C to +120°C
Pressure rating	Up to 7 bar (low-pressure duty)
pH range	4 – 9

03

Media Compatibility

Mineral oilsFuelsLubricantsWater

04

Dimensions & Sizing

Sheets 915×915 / 1000×1000 mm · 1.5–6.0 mm thickness · fine or coarse grain

05

Standards & Conformance

ASTM F104
DIN 28090

06

Certifications

ISO 9001
RoHS / REACH compliant

07

Additional Specifications

Density	0.5–0.9 g/cm³
Grain	Fine or coarse

Compressibility (ASTM F36)	30–45%
Backing	Plain or self-adhesive

Specify & QuoteORDER

Build your line item

Choose the material grade and size that match your duty, set a quantity, and add a fully-specified line to your quote. No prices, no obligation — our engineers confirm specification and lead time on every enquiry.

01

Material grades

Cork / NBR composite
Cork / SBR composite
Fine-grain cork-rubber
Coarse-grain cork-rubber
Adhesive-backed cork-rubber

02

Sizes & configurations

915 × 915 mm sheet
1000 × 1000 mm sheet
1.5 / 3.0 / 5.0 / 6.0 mm thick
Fine or coarse grain
Self-adhesive backed
Die-cut gaskets to drawing

In ServiceUSE

Where it holds the line

Cork-rubber composite seals where pressure is low and bolt load is limited — sump pans, gearbox covers, transformer lids and equipment housings. Granulated cork bound in nitrile rubber gives the sheet high compressibility so it conforms to thin, flexible covers without crushing, plus good resistance to oils and fuels and a natural ability to recover after cycling. It is the economical, reliable choice for low-pressure oil-sealing joints across automotive, electrical and general engineering.

Typical applications

01Sump, oil-pan and gearbox covers
02Transformer and electrical-enclosure lids
03Compressor and pump housing joints
04Fuel-system and filter gaskets
05General low-pressure equipment covers

Industries served

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