Sekisui Thermobreak®

Sekisui Thermobreak® is a world-leading thermal insulation material, specifically engineered for HVAC and building service applications where performance, safety, and long-term durability are paramount. Made from physically crosslinked, closed-cell polyolefin foam, Thermobreak® provides exceptional thermal resistance and moisture protection, helping to optimize energy efficiency and system performance in both commercial and industrial environments.

Its proprietary closed-cell structure ensures minimal water absorption and vapor permeability, making it ideal for high-humidity areas. Thermobreak® is fiber-free, dust-free, and does not support mold or microbial growth—enhancing both installation safety and indoor air quality. The material complies with key international fire standards and building regulations, including AS/NZS 1530.3 and ISO 5660, offering peace of mind in safety-critical applications.

Designed with installers in mind, Thermobreak® is lightweight, highly flexible, and easy to fabricate. It comes with an aluminum foil facing for enhanced fire performance and radiant barrier properties, and is also available with pressure-sensitive adhesive (PSA) for quick and efficient installation.

Key Features

• Superior thermal insulation with low thermal conductivity
• Physically crosslinked closed-cell polyolefin foam structure
• Fiber-free, dust-free, and non-irritant—safe for indoor environments
• Excellent fire performance (AS/NZS 1530.3 and ISO 5660 compliant)
• Extremely low water absorption and moisture permeability
• Resistant to mold, mildew, and microbial growth
• Available with reinforced foil facing for fire and radiant performance
• Optional pressure-sensitive adhesive backing for quick install
• Lightweight, flexible, and easy to cut and handle on-site
• Tested to international acoustic and mechanical standards

Ideal for Applications Such As

• HVAC ductwork (supply, return, and exhaust systems)
• Hot and cold water pipe insulation
• Chilled water and refrigeration lines
• Acoustic and thermal lagging in plant rooms
• Insulated enclosures and plenum spaces
• Commercial, healthcare, and data center infrastructure
• Energy-efficient retrofits and new construction projects