Seals and gaskets for high temperatures


Seals and gaskets for industrial use are subjected to different types of stress; chemical, physical and mechanical, guaranteeing tightness and blocking the passage of fluids. Their strategic importance means that it is important to make the right choice according to application and the context in which they will be used.


The constructive characteristics and the materials used to make gaskets depend on the tightness and resistance required by their sector of application. These essential industrial components may have to resist contact with acid, oil or grease, as well as adverse weather conditions, high pressure or extreme temperatures.


Heat-resistant gaskets, for example, are made with techniques and materials that guarantee that the product offers excellent resistance to high temperatures. GBL’s many years of experience allows us to provide our clients with a wide range of solutions suited to the demands of extremely varied industrial sectors, guaranteeing the utmost efficiency and safety for each situation.

Properties of heat-resistant gaskets

The thermal stress that gaskets are subjected to can come from either direct heat, for example naked flames, or from indirect heat produced by contact with mechanical parts or from irradiation.


Gaskets designed to be heat-resistant are able to maintain their properties unaltered even when subjected to particularly high temperatures, managing to guarantee excellent surface pressure and a level of tightness that is in line with the type of use.


Furthermore, they are strong enough to resist tearing, scratching and even prolonged contact with industrial oils and greases as well as the acid and alkaline substances that may damage or corrode them.


Thanks to their properties, industrial gaskets are made to be integrated into mechanisms in the widest range of sectors; from pneumatics to the automotive industry, from hydraulics to the chemical sector, to the manufacture of earth-moving machinery or for the food sector.


The choice of design and of raw materials with which to make heat-resistant gaskets obviously depends on the working temperatures relative to the specific use.


Materials for heat-resistant gaskets

The production process for high-temperature-resistant seals begins with the choice of material best suited to the client’s project. Our GBL production department assists every single client in choosing the most suitable raw materials for the specific use and the heat resistance required.


We are able to process and transform the widest range of materials in order to make customised heat-resistant gaskets that satisfy the specific requirements of each application. We rely on a solid network of both Italian and European suppliers, rigorously certified and tested to respond with precision to the highest quality standards.


The materials that we can handle include:

  • elastomers such as ACM, EPDM, FKM, VMQ, FVMQ, CR, HNBR, NBR, NBR-PVC, SBR, NR, AU.
  • thermoplastics such as ABS, PA6, PA6.6, PA6.6 FG, PBT, PC, POM, TPE, TPU.
  • Materials reinforced with textile fibres such as cotton, nylon and aramid fibres.


Resistance to high pressure

The level of resistance to high pressure of pumps and similar applications can be maximised by the use of suitable gaskets. GBL is able to supply the high-pressure sector with sealing systems resistant up to 600 bar.

The use of aramid fibres, i.e., those obtained through the processing of aromatic polyamides, is particularly suited to contexts where it is essential to guarantee tightness at particularly high pressures.


Resistance to high temperatures
Silicones and FKMs are the materials most suited to high-temperature applications. They respond excellently to thermal stress, without ever losing their principal properties and without ever compromising tightness.


Silicone gaskets are among the most resistant to heat, and easily withstand a temperature range of between -60° and +230°C. FKMs, instead, are used at temperatures of between -15° and +250°C, and can also offer effective resistance to breakage, deformation, abrasion and lacerations, as well as to fuels, organic solvents and ozone.

Why turn to GBL for heat-resistant gaskets

Our experience allows us to provide each client with dedicated products and heat-resistant gaskets that offer excellent resistance, performance and quality. Our components can be personalised according to the sector they are used in, to their specific use, and to the demands of the project into which they will be integrated.


Furthermore, they are always made with avant-garde materials, drawing on advanced construction techniques that adapt to the context of use with the utmost flexibility. The materials that are introduced into our production processes undergo strict quality controls and are declared as compliant only if they pass acceptance tests. From here, each material is identified with a batch number, ensuring traceability right up to the finished product.

Quality controls on GBL seals and gaskets are carried out by a team of qualified technicians using modern tools to carry out the necessary checks before commercialising the products. We have also chosen to adapt to the requirements of SQ Certification – UNI EN ISO 9001:2015 and SQ – IATF 16949:2016, in order to guarantee the constant quality of our processes and products.

Are you interested in finding out more about our high-temperature and pressure-resistant gasket? Contact us for professional pre-sales support or to understand, together, how to optimise the performance of your systems or machinery, thanks to the resistance and strength of our gaskets.