304 ml Heat-resistant sealant up to 1260 °C Insulmould®

Short Description

Insulmould 1260 (304 ml cartridge) is a high-quality, ceramic-based refractory mouldable designed for quick and reliable sealing of cracks, expansion joints, and openings in refractory linings up to approximately 1260 °C. The product is specially developed for professional use in industrial environments where maintenance or repair of thermal insulation and refractory linings is required.

Product Specifications

• Nominal maximum operating temperature: approx. 1260 °C
• Form: putty-/caulk-like material in a 304 ml cartridge
• Base: ceramic fibers bonded with selected inorganic and organic binders
• Thermal conductivity (example value): approx. 0.21 W/m·K at 600 °C (dry)
• Dry density: approx. 675 kg/m³
• Packaging: 304 ml cartridge (other sizes available upon request)
• Professional use only: dust may be carcinogenic (Category 1B, H350i)

Key Features

• Extremely high temperature resistance — suitable for applications up to approx. 1260 °C
• Low thermal conductivity — excellent insulating performance
• Good resistance to thermal shock and vibration — ideal for demanding industrial use
• Chemically stable under harsh conditions
• Ready to use in a practical format — the 304 ml cartridge allows for easy application, even in hard-to-reach areas
• Fast and efficient application — suitable for troweling, injection, or hand-forming, depending on viscosity

Applications

Suitable for a variety of high-temperature applications such as:
• Sealing and repairing cracks or expansion joints in vermiculite (Pumicon) boards, bowls, and shapes
• Repair of silicate boards and refractory bricks
• Use with ceramic fiber blankets
• Thermal insulation in furnaces, boilers, chimneys, and industrial systems
• Industrial packaging requiring thermal protection

Installation Instructions

• Ensure the surface is dry, clean, and free of loose particles before applying Insulmould 1260
• Apply the material directly from the cartridge to the area to be sealed or repaired
• Depending on the application, the material can be troweled, injected, or hand-formed
• For specific needs, the putty may be thickened with vermiculite powder or diluted with water (in limited amounts) to improve workability
• Allow sufficient drying or curing time before putting the installation back into service

Questions or Need Help?

Contact our customer service team for advice or additional information about this product. We’re happy to help.