Cookies help us deliver our services. By using our services, you agree to our use of cookies. Learn more

Choose a location

    Cavipor® - Reliable insulation!

      Cavipor® is the new mineral-based in-situ foam system for energy renovations of double-wall masonry.

      Cavipor® is a non-combustible mineral insulation material that can be processed quickly and easily. This foam is suitable for subsequent energy renovations of buildings constructed of double-wall masonry. In general, this measure of retro-fitting by insulating the cavity-wall has an amortization period of 5-7 years making it a highly profitable investment – both economically and ecologically. In addition to previously established systems like stone wool, glass wool, EPS beads, synthetic resin foam, and recycled shredded paper, Cavipor® now offers a new system that combines the advantages of a hydrophobic and open-pore mineral insulation material with the fast, safe, and seamless processability of a self-sealing foam system. In contrast to most other systems on the market, Cavipor foam can be disposed of along with construction waste without having to painstakingly separate it during renovations or demolitions, or re-used as a foundation material.

      Cavipor is the world's first 3-component system for manufacturing a mineral-based in-situ foam. It was developed at BASF through 8 years of intensive research with over 5000 test recipes, and is protected by multiple patents. The system received general technical approval under construction law.

    Your benefits
    mineral based -> non combustible
    thermally insulating -> WLG 035
    clean & fast -> dust free & self sealing
    air & water based -> low emission
    open pored -> moisture regulating
    disposable -> sustainable

    Download Center

      Cavipor® - Reliable insulation!

      • Non combustible: Cavipor foam consists of 90% inorganic components and 10% organic binder, is classified as a non-combustible A2-s1,d0 construction material (according to DIN EN 13501-1) and is permitted for all building classes.
      • WLG 035: It has a rated thermal conductivity value of 0.035 W/Km (according to DIN EN 12667) and is classified as WLG 035.
      • Dust free: All Cavipor components are water based and solvent-free. Cavipor foam is a flowing material making the application dust-free.
      • Self sealing: During application, the foam flows through small drilled holes into all narrow areas of the hollow layer. Then it sets, preventing it from escaping through small holes or gaps, which do not need to be closed up in advance.
      • Low emission: Cavipor components are air-foamed, meaning the foam does not contain any internal propellants, so no internal pressure is built up. It does not emit any pollutants – neither while drying nor while the foam remains in the hollow layer.
      • Moisture regulating: Its open-pored structure allows water vapor to evaporate. The foam also has a certain capacity to store vapor, thereby regulating moisture in the surrounding area.
      • Sustainable: Thanks to its mineral components, the foam sticks to mineral-based surfaces and thus sets without sagging. After Cavipor foam is removed, it can be disposed of with construction waste or used as foundation material.

      The Cavipor system combines the advantages of a mineral based insulation material with the simple, safe, and clean processing of a foam system. The water-based components can be transported and processed dust and fiber-free, offering 10x the foam volume after being expanded with air. The fresh foam is injected into the cavity wall through small filling holes, where it does not expand further or build up internal pressure. The foam's flow properties ensure that it fills the cavity layer seamlessly − largely independent of the layer's thickness and any narrow areas.

      Cavipor foam is self-sealing. It is prevented from exiting through small holes and cracks in the wall, and no preliminary work or reworking is generally necessary. The fresh foam already offers good insulation capabilities at this point. After the drying process, during which the breathable foam continuously dries out by releasing the water as water vapor without causing any damage, the foam will reach its optimal thermal insulation level and notably dampen even ambient noise. The dry foam, which has a bulk density of 30g/l, sticks to the inside of the wall surfaces, preventing the material from sagging. It is hydrophobic and does not absorb any liquid water. However, water vapor can continue to diffuse through the open pores of the foam, while part of the water vapor can also be stored in the foam itself. The foam adapts to ambient climate changes, even regulating ambient moisture, and can help contribute to a better indoor climate. The dried foam consists of 90% inorganic components, meaning it is non-combustible and can be disposed of with construction waste during demolition or reused as foundation material.

      Foaming concept

      Cavipor® foam is produced on site from the template, filler, and X-linker components. The fresh foam is injected into the hollow layer through a fill hole, where it sets and dries.


      The fill hole for injecting the foam into the hollow layer is so small that it typically does not damage clinker bricks during drilling. The self-sealing foam cannot flow out of the holes after cross-linking. After the final filling of the holes with grout, no evidence of the intervention remains visible.

      Dimensional stability

      The dried insulation foam has a density of 30g/l, is hydrophobic, breathable, and dimensionally stable.


      Cavipor® foam passes the SBI test according to DIN EN 13823 (20 min. controlled flame treatment of a coated room corner) and is classified as a "non-combustible" construction material (class A2- s1,d0).