Knitted Sealing Cords
High-Temperature Sealing Solutions
Our knitted sealing cords are designed for demanding industrial and commercial applications where extreme temperatures and reliable sealing are essential.
Made from a soft core wrapped in a durable knitted ceramic, glass, or silicate fiber sheath, these cords combine flexibility with outstanding heat resistance – perfect for furnaces, kilns, stoves, and high-temperature machinery.
Whether you need standard sizes or custom knitted sealing cords, we provide solutions tailored to your exact requirements.
- Material | Application temperature
- Kaldera 550 | Kaldera 750 | Kaldera 1000 | Kaldera 1050 | Kaldera 1100 | Kaldera 1260
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Temperature resistance
Max. Application temperature, depending on material, up to 1260°C.
Thermal conductivity
Low thermal conductivity and good electrical insulation properties.
Stable & Durable
Good dimensional stability and good chemical resistance.
Key Features of Our Knitted Sealing Cords
Heat resistant up to 1260 °C (2300 °F)
Asbestos-free and safe to handle
Flexible and easy to cut, shape, and install
Excellent thermal insulation and low thermal conductivity
Strong chemical resistance for demanding industrial environments
Available in various diameters, lengths, and custom configurations
Benefits at a Glance
- Long service life even under extreme heat and heavy wear
- Easy installation thanks to flexibility and soft core design
- Safe and eco-friendly, completely free of asbestos
- Reduces maintenance downtime and overall costs
- Ideal for a wide range of applications, from industrial production to commercial equipment
- Available in bulk rolls or cut-to-length options
Applications
Knitted sealing cords are widely used in industries that require reliable, high-temperature sealing:
- Furnaces and kilns – door seals, protective barriers, insulation
- Industrial ovens and foundries – heavy-duty sealing for extreme heat
- Stove and fireplace doors – flexible seals that prevent heat loss
- Power generation – turbines, boilers, and high-energy equipment
- Chemical plants – resistant to aggressive chemicals and gases
- Marine and shipbuilding – reliable performance under dynamic conditions
- Automotive industry – exhaust systems and heat shields
TECHNICAL DETAILS
Product | Article Kaldera 550 Kaldera 750 Kaldera 1000 Kaldera 1050 Kaldera 1100 Kaldera 1260 Material E-Glassfibre HT-Glassfibre Continuous filament silicate fibre Alkaline earth silicate fibre Silicate staple fibre Aluminium silicate fibre Color White Blue White, Ivory Green White White Max. Apliccation-temp. 550°C 700°C 1000°C 1050°C 1000°C 1260°C Melting point 1200°C 1200°C 1550°C 1260°C 1550°C 1790°C Fire behaviour Non-flammable Non-flammable Non-flammable Non-flammable Non-flammable Non-flammable Chemical resistance good good good good good good Frequently Asked Questions (FAQ)
Are knitted sealing cords asbestos-free?
Yes, our knitted sealing cords are 100% asbestos-free and completely safe for use in industrial and commercial environments. They are designed to meet modern safety and environmental standards.
Can I cut knitted sealing cords myself?
Yes, knitted sealing cords can easily be cut with a sharp cutter or scissors. For precise shapes or series production, we recommend using die-cutting tools or laser cutting.
How often should I replace the sealing cords?
The lifespan depends largely on the temperature and the mechanical stress they are exposed to. For intensive high-temperature applications, we recommend inspecting the cords at least once per year and replacing them when necessary to avoid failures and damage.
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Downloads
Datenblatt Kaldera 550
Product properties, typical applications and availabilities.
Data sheet Kaldera 750
Product properties, typical applications and availabilities.
Data sheet Kaldera 1000
Product properties, typical applications and availabilities.
Data sheet Kaldera 1050
Product properties, typical applications and availabilities.
Data sheet Kaldera 1100
Product properties, typical applications and availabilities.
Data sheet Kaldera 1260
Product properties, typical applications and availabilities.
Hoffmann product catalog
Refractory | Seals | Foundry supplies | Conveyor chains | Chesterton
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K. Hoffmann GmbH
For over 40 years, we have been manufacturing high-temperature-resistant boards, pressed, and milled molded parts from Vermiculite.
Due to its special properties, vermiculite is particularly suitable as a lightweight insulation material and is characterized by its temperature resistance up to 1100 °C.
If you are also looking for a sustainable insulation material without health concerns, then contact us.
