Gasket Sheets

Gasket sheets, also referred to as "gasket paper" or sheet gasket materials, are flat sheets of sealing material that can be cut to size and used as cost-effective replacements for pre-formed gaskets. They are commonly manufactured from flexible and compressible materials such as cork, rubber, graphite, and nitrile, and are used across industries to create leak-tight seals between mating surfaces.

Available in a variety of sheet sizes and thicknesses, gasket sheets are suitable for bespoke applications or rapid replacement when pre-cut gaskets are unavailable, allowing maintenance teams to fabricate seals on demand. For a deeper understanding of gasket materials, types, and selection guidance, explore our Comprehensive Gasket Guide.

What Is a Gasket?

A gasket is a mechanical sealing component placed between two mating surfaces to prevent leakage of fluids or gases under compression. It is typically cut or formed to match the geometry of the joint being sealed.

Gaskets are commonly used between flanges, pipe joints, housings, and enclosures to create a compressible seal that maintains containment while allowing for pressure and thermal variation.

While gaskets and O-rings both provide sealing functions, gaskets are generally flat seals used between static surfaces, whereas O-rings are elastomeric seals used in grooves for dynamic or static applications, depending on design requirements.

Types of Gasket Sheet Materials

Gasket sheets come in a variety of materials for different applications. These are a few common materials you can find across suppliers:

• Compressed Fibre Gasket Sheets (non-asbestos): Typically made from aramid fibres and elastomer binders, these materials provide a balance of mechanical strength, temperature resistance, and chemical compatibility for general industrial use.
• Elastomer-Based Sheets: Rubber-based gasket sheets such as NBR, EPDM, and neoprene offer flexibility and sealing performance for low- to medium-pressure applications with specific chemical requirements.
• Graphite Gasket Sheets: Flexible graphite provides excellent thermal stability and chemical resistance, particularly for steam, hydrocarbons, and high-temperature flanged joints.
• PTFE Sheets: Polytetrafluoroethylene gasket sheets offer outstanding chemical resistance and low friction, making it suitable for aggressive chemical environments where purity and inertness are required.

Which Material Should I Use?

When choosing a premade gasket or creating your own from a gasket sheet, it is important to evaluate operating conditions to ensure suitable performance over time. Chemical compatibility, operating temperature, pressure, and mechanical load all influence gasket material selection, along with maintenance and lifecycle considerations.

• Natural Rubber: Offers good resistance to water and mild chemicals, with high elasticity and compressibility. However, rubber is not suitable for oils, fuels, ozone exposure, or high temperature environments.
• Cork: Lightweight and compressible with good vibration-damping properties, often used in low-pressure applications such as sealing covers or housings. Mechanical strength and long-term creep resistance are limited compared to engineered materials.
• Nitrile Rubber (NBR): Provides strong resistance to petroleum-based oils and fuels, which makes nitrile rubber gaskets widely used in automotive and hydraulic sealing applications. However, it is not suitable for strong oxidising agents, certain solvents (e.g. ketones), or high ozone exposure.
• Graphite: Suitable for high-temperature and high-pressure environments, including steam and chemical service. Flexible graphite materials maintain sealing performance under thermal cycling, and are often reinforced with metal inserts for strength and blowout resistance.

How to Choose Gasket Sheets

Selecting the right gasket sheet requires careful evaluation of the operating conditions, the substances being sealed, and the mechanical demands of the installation.

• Operating Temperature: Confirm the material can withstand the minimum and maximum service temperatures of the application without degrading or losing sealing capability.
• Pressure Rating: Choose a sheet rubber gasket material rated to handle both steady-state and peak pressures of the system, including potential pressure surges.
• Chemical Compatibility: Verify the material is resistant to the specific fluids, gases, and chemicals present in the application to prevent premature failure.
• Thickness and Compression: Match the sheet thickness to the joint design, with thicker sheets accommodating uneven flange surfaces and thinner sheets offering tighter dimensional control.
• Material Type: Select rubber, cork, graphite, or composite materials based on the specific combination of temperature, pressure, and chemical exposure in the application.
• Flange Surface Finish: Smoother flanges require softer, more conformable materials, while rougher surfaces may demand thicker or more compressible sheets to achieve a reliable seal.
• Seal Criticality: For safety-critical or high-consequence systems, prioritise materials with proven performance data and traceable certifications.
• Compressibility: Higher compressibility allows the gasket to fill surface irregularities, while lower compressibility provides greater dimensional stability under load.
• Recovery Properties: Materials with good recovery resist creep and maintain sealing force across repeated thermal or pressure cycles.

Industrial Applications of Gasket Sheets

Gasket sheets are essential consumables across a wide range of industrial sectors in Malaysia, supporting reliable sealing in everything from heavy plant infrastructure to precision production equipment.

• Oil and Gas: Gasket material sheet products are used to fabricate flange seals, valve gaskets, and pump seals across upstream and downstream operations in Malaysia's energy sector.
• Chemical Processing: Chemical-resistant gasket sheets seal reactors, pipework, and storage vessels handling aggressive acids, solvents, and process fluids.
• Power Generation: High-temperature gasket materials seal boilers, turbines, and steam piping in conventional and renewable power generation facilities.
• Automotive: Gasket paper sheet products are widely used for engine, transmission, and auxiliary system seals in vehicle manufacturing and aftermarket repair.
• Manufacturing: Production machinery, hydraulic systems, and pneumatic equipment rely on custom-cut gaskets to maintain leak-free operation.
• Water Treatment: Pumps, valves, and piping in municipal and industrial water and wastewater treatment systems use gasket sheets for durable, chemically resistant seals.
• Food and Beverage: Food-grade rubber gasket sheet materials seal processing equipment, storage tanks, and piping in compliance with hygiene requirements.
• Marine: Corrosion-resistant gaskets seal piping, pump housings, and engine components on commercial vessels and offshore platforms.
• Aerospace: Aerospace-grade gasket sheets meet stringent fire, temperature, and chemical resistance specifications for aircraft systems and ground support equipment.
• Petrochemical: Graphite and composite gasket sheets seal high-temperature, high-pressure flanges in refineries and petrochemical processing plants.

Installation and Handling Considerations for Gasket Sheets

The performance of gasket sheets is dependent on proper installation. Take note of these handling and installation considerations to ensure they function properly:

• Surface Preparation: Flange faces should be clean, flat, and free from damage to ensure effective sealing and avoid leak paths.
• Bolt Loading and Torque: Correct tightening sequence and torque values are essential to achieve uniform compression across the gasket sheet and prevent uneven sealing.
• Cutting Accuracy: Poorly cut gasket shapes can result in misalignment, leakage, or reduced sealing area, particularly around bolt holes.
• Storage Conditions: Gasket sheets should be stored in a controlled environment to prevent degradation from UV exposure, humidity, or contamination.

Supplier and Distributor of Gasket Sheets in Malaysia

RS is your dependable partner among rubber gasket sheet suppliers in Malaysia, delivering high-quality sealing materials for industrial applications. We supply an extensive range of products from globally recognised manufacturers such as Klinger and our very own RS PRO, encompassing various materials, thicknesses, and sheet sizes at competitive price points to ensure you secure the ideal sheet for your specific application.

Beyond gasket materials, we carry a comprehensive array of complementary sealing and maintenance products, including O-rings, seals, and compression packings to support your full repair and assembly needs. Purchase your gasket sheets, paper gasket material sheet products, and related accessories online today. For further details regarding our delivery fees options and fees, please consult our dedicateddelivery information page.