Cork Rubber Sheets
Kaxite KXT-GS2052 cork rubber sheet is a compound of granulated cork and synthetic rubber polymer, combined with processing assistants. It offers both the high resilience of rubber and the compressibility of cork, making it suitable for static sealing in low and medium pressure joints. The sheet is produced in two hardness grades — Medium (55–70 Shore A) and Hard (70–85 Shore A) — in thicknesses from 0.8 mm to 100 mm, and three standard sheet sizes: 950×640 mm (untrimmed), 915×610 mm (trimmed) and 1800×650 mm. Technical data follows ISO 4714. Service temperature range is −40 °C to +150 °C. Typical applications include automotive engine gaskets, ship engine and pipework gaskets, petroleum pipeline flanges, transformer housings, electrical equipment and general industrial static sealing. Model:KXT-GS2052
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Product Description
Cork Rubber Sheets for Automotive Gaskets, Transformers and Low-Pressure Static Sealing
KXT-GS2052 is a cork rubber sheet compound produced by binding granulated cork with synthetic rubber polymer and processing assistants. The finished sheet combines two properties that neither material delivers alone — the high resilience of rubber and the compressibility of cork — which is why it is specified as a general-purpose static sealing material for low and medium pressure joints.
It is used as gaskets on engines for automobiles, tractors, ships and general industrial equipment, on petroleum pipelines and pipework, on transformer housings, and on a wide range of electrical equipment and instruments. The sheet has a smooth surface, is resilient to constant use, and contains no through holes or voids.
KXT-GS2052 cork rubber sheet is produced from granulated cork and synthetic rubber polymer, combined with processing assistants that bind the cork granules into a uniform sheet. The cork provides the compressibility that allows the sheet to conform to mating surfaces under bolt load; the synthetic rubber polymer provides the resilience that lets the sheet recover as bolt load relaxes. That combination is what separates cork rubber sheet from plain composition cork, which has no rubber binder and cannot withstand continuous dynamic service.
The result is a general-purpose sheet that performs well in light to medium duty sealing applications, mostly indoors, where the joint is not exposed to continuous outdoor weather, oil immersion or aggressive chemical attack. For oil and fuel contact, the nitrile-bound H-series is the correct grade. For weather and chemical exposure, specify the neoprene-bound E-series.
Three standard size configurations are produced. Sheet thickness for all three covers 0.8 mm to 100 mm.
Values below follow ISO 4714 and are distinguished from granule grade. Two hardness grades are produced — Medium and Hard. Selection depends on the bolt load the gasket will carry and the surface compliance required at the joint.
| Property | Medium Grade | Hard Grade |
|---|---|---|
| Hardness (Shore A) | 55 – 70 | 70 – 85 |
| Density (g/cm³) | ≤ 0.9 | ≤ 1.05 |
| Tensile Strength (kg/cm²) | ≥ 15 | ≥ 20 |
| Compressibility (% at 300 psi load) | 15 – 30 | 10 – 20 |
| Sealing Pressure (min) | 28 kg/cm² | 28 kg/cm² |
| Internal Pressure (max) | 3.5 kgf/cm² | 3.5 kgf/cm² |
| Service Temperature (max) | −40 to +120 to +150 °C | −40 to +120 to +150 °C |
Material Summary
KXT-GS2052-
- Composition
- Granulated cork + synthetic rubber polymer
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- Sheet Format
- Sheets, untrimmed or trimmed
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- Hardness Grades
- Medium, Hard
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- Standard Thickness
- 0.8 – 100 mm
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- Sheet Sizes
- 950×640 / 915×610 / 1800×650 mm
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- Surface
- Smooth, void-free
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- Sealing Type
- Static, low and medium pressure
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- Standard Reference
- ISO 4714
Sheets are packed flat in standard cartons measuring 950 × 640 × 300 mm, sized to match the standard untrimmed sheet format. Custom packing and palletised shipments are available on request — send the destination port and required quantity to confirm shipping configuration.
| Input | Options / Range | Why It Matters |
|---|---|---|
| Hardness Grade | Medium (55–70 Shore A) / Hard (70–85 Shore A) | Determines bolt load capacity and surface compliance at the joint |
| Thickness | 0.8 mm to 100 mm | Thinner for machined faces, thicker for rough or irregular surfaces |
| Sheet Size | 950×640 / 915×610 / 1800×650 mm | Match to gasket dimensions to minimise offcut waste |
| Edge Type | Untrimmed / Trimmed | Trimmed for direct die cutting, untrimmed for lower cost where edge finish is not critical |
| Quantity | Sheets or cartons | Determines packing configuration and shipping cost |
| Working Media | Dry, low to medium pressure | If oil or chemical contact is expected, the nitrile or neoprene grade is the correct choice |
What is cork rubber sheet made from?
It is a compound of granulated cork and synthetic rubber polymer, together with processing assistants that bind the cork granules into a uniform sheet. The rubber binder gives the sheet its resilience and the cork gives it compressibility, which is what makes it useful for static gasketing.
What is the difference between cork rubber sheet and natural cork composition sheet?
Natural cork composition sheet has no rubber binder, so it is limited to dry light to medium duty sealing with limited resilience. Cork rubber sheet adds a synthetic rubber binder, giving greater resilience, better recovery under repeated load, and improved dimensional stability — suitable for engine gaskets and static sealing where a plain cork sheet would relax and lose its sealing force.
What is the difference between KXT-GS2052 and the H-series nitrile cork sheet?
KXT-GS2052 is a general-purpose cork rubber sheet bonded with a synthetic rubber polymer, intended for dry light to medium duty static sealing. The H-series is specifically bonded with nitrile rubber for resistance to oil, aromatic fuels and solvents, and the E-series uses neoprene for weather and chemical resistance. If the joint will see oil, fuel or chemicals, specify H-series or E-series instead.
What hardness grades and thicknesses are available?
Two hardness grades: Medium (55–70 Shore A) and Hard (70–85 Shore A). Thickness ranges from 0.8 mm to 100 mm across three standard sheet sizes — 950×640 mm, 915×610 mm and 1800×650 mm. Custom hardness and thickness can be produced on request.
What temperature range does the sheet handle?
Service temperature range is −40 °C to +120 °C continuous, with short-term excursions up to +150 °C. This suits automotive engine gaskets, transformer housings and general industrial sealing where continuous high temperature is not a factor.
What pressure can the sheet seal?
Minimum sealing pressure is 28 kg/cm². Maximum internal pressure is 3.5 kgf/cm². This makes the sheet suitable for low and medium pressure static sealing, not high-pressure flange applications.
Does the sheet contain through holes or voids?
No. The cork rubber sheet has a smooth surface and does not contain through holes or voids within the cork-rubber matrix, which matters at thin gauges where a void would become a leak path under pressure.
How is the sheet packed and shipped?
Sheets are packed flat in cartons measuring 950 × 640 × 300 mm, sized to match the standard untrimmed sheet format. Custom packing and palletised shipments are available on request. Send the destination port and required quantity to confirm shipping configuration.
Request a Cork Rubber Sheet Quotation — KXT-GS2052
Send the required hardness grade, thickness, sheet size and quantity. Kaxite will confirm availability, lead time and packing configuration. If your application involves oil, fuel, weather or chemical contact, tell us and we will recommend the appropriate cork rubber grade instead.