Joint Sealant for High-Temperature Applications and Use of the Joint Sealant Preferably for Application to Silica Materials

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This patent discloses a new joint sealant specifically designed for high-temperature applications, such as industrial furnaces and glass-melting systems. The sealant consists of a foamable mixture containing glass powder (or a glass substitute), quartz powder, a blowing agent, and a binder. When exposed to furnace heat (800°C to 1,600°C), the mixture expands to fill and seal joints—accommodating the thermal expansion of the surrounding materials and providing a durable, gas-tight, and heat-resistant seal, especially suitable for construction with silica-based materials.

Use CasesContent extracted from patent full text and abstract with AI.

• Sealing expansion joints in industrial furnaces, including glass-melting furnaces.
• Preventing gas and glass leakage from joints in furnace or kiln structures.
• Repair and maintenance (retrofit) sealing of existing high-temperature furnace joints.
• Insulating and sealing unintentional openings in high-temperature processing equipment.
• Providing customizable pre-shaped sealant forms (e.g., plates or strips) for easier application in complex or large joints.
• Sealing joints in walls built with silica materials to prevent corrosion and extend furnace lifespan.

BenefitsContent extracted from patent full text and abstract with AI.

• Maintains a tight, gas-proof seal at extremely high temperatures (up to 1,600°C).
• Automatically adapts to the thermal expansion of surrounding materials, reducing risk of cracks or leaks.
• Resistant to chemical and mechanical degradation, leading to longer maintenance intervals and lower costs.
• Compatible with silica-based construction materials without causing corrosion or contamination.
• Easily shapeable and applicable—even in complex, vertical, or inaccessible joints—by spraying, pressing, or molding.
• Provides both mechanical and thermal insulation, improving furnace efficiency and safety.
• Can be tailored in composition for specific temperature ranges and furnace environments.

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The object of the invention is to create a joint sealant for sealing joints in the high-temperature range, which overcomes the disadvantages in the state of the art, which is self-sealing and resistant to high temperatures, and which adapts to the thermal expansion behaviour of the joint. A joint sealant (3) for high-temperature applications comprises a foamable mixture of glass flour or a glass substitute and an additive for increasing viscosity or for temperature adjustment, blowing agent and binding agent. Also provided is a method for sealing joints (2) in industrial furnaces for high-temperature applications, wherein a joint sealant (3) is introduced into the joint (2) as a foamable mixture of glass flour or a glass substitute and quartz flour, blowing agent and binding agent, at least sections of which are foamed with the effect of the heat of the high-temperature applications. Also provided is a use of a foamable mixture comprising glass flour or a glass substitute and quartz flour, blowing agent and binding agent as a joint sealant for high-temperature applications in expansion joints or other unintentional furnace chamber openings in an industrial furnace or a glass-melting system.