At STEFFCA, we keep stocks of glass and ceramic fibre gaskets. We have extensive technical knowledge in this industry, based on more than 25 years of experience.

Used in wood-burning stoves, boilers, straw-fired stoves, pellet ovens, etc., where the temperature is an important parameter. Glass fibre gaskets will typically withstand temperatures up to 550°C. They have a slightly larger fibre diameter and length, which is why they have a different structure compared with ceramic fibre gaskets, which can withstand temperatures up to 1,250°C. The fibre diameter is much smaller in ceramic fibre gaskets, and it is necessary to make them over an Inconel core, which is also temperature-resistant.

There are different kinds of glass fibre gaskets for wood-burning stoves, in technical terms known as glass cord. Knitted, braided and textile glass cords are all available.


Our product range features a glass cord that can withstand temperatures up to 550°C. The glass cords are available with and without an E-glass core. They are typically used for hatches where you open and close the combustion chamber. It could also be used as a cover where you need to access the boiler. Our product range includes different sizes, both round and square, and in hard and soft versions.

If the 550°C capacity of the glass cord is not enough, it is possible to insert a ceramic cord with Inconel fibre in the gasket. The ceramic cord is typically used up to a temperature of 1,250°C, which makes it useful where you are close to the flames.

The glass cords come in different colours, typically black, dark grey or white. The colours help to provide a smart finish to the wood-burning stove. Selected gaskets are also available with adhesives. This enables you to hold them firm until you have fixed them into position.


Knitted glass cord is available with or without an E-glass core. Without a core, the cord is knitted all the way through and is highly compressible. By contrast, the one with a longitudinal core is more solid. This version is a little harder and less compressible.

Braided glass cord has a different surface than a knitted glass cord. They are all produced with a longitudinal core of different hardnesses. They are typically used in industry and for larger straw-fired stoves, pellet burners, and boilers, etc. This kind is available in soft, hard, round, and square versions.

Our textile glass cords are a range with a much higher finish than the typical knitted or braided cords. They have a completely different surface, not a bristly fiber, which makes them much more attractive than the other cords. The textile glass cord is typically made for hatch packing, where the customer can see the hatch packing when the hatch is open. This kind is available as a profile packing, which is widely used in the wood-burning stove industry. Selected packings are also available with adhesives. This enables you to hold them firm until you have fixed them into position.

Our wood-burning stove range also includes glass tape and ladder tape. Ladder tape is shaped like a “ladder”. Some steps are “missing” in the middle, making it easy to wrap around a wood-burning stove glass or a plate. They withstand temperatures up to 550°C. Glass tape is typically available, as is ladder tape, in thicknesses of 2 and 3 mm and in different widths. Selected types are also available with adhesive. This enables you to hold them firm until you have fixed them into position.

Woven packings are available in different diameters. They are characterized by the fact that they can be adapted for different constructions, depending on how they are woven.

We also have our glass needle felt or silica needle felt. Glass needle felt can withstand temperatures up to 550°C and silica needle felt can withstand up to 1,000°C. What both have in common is that this is a mat in which the fibers are pinned together in a criss-cross pattern of pure E-glass or silica fiber respectively. There is no binder of any kind that can burn out when they heat up. This gives you an incredibly stable mat for insulation that does not become porous when it has been heated to over 300°C, as rock wool does, for example.

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