Cavipor® - Reliable insulation

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



Cavipor® is a non-combustible mineral-based insulation foam system that can be easily processed. It is particularly suitable for subsequent energetic 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 the European Technical Approval (ETA-19/0240) in 2020.

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

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.

 It has a rated thermal conductivity value of 0.035 W/Km (according to DIN EN 12667) and is classified as WLG 035.

All Cavipor® components are water-based and solvent-free. Cavipor® foam is a flowing material making the application dust-free.

During application, the foam flows through small drilled holes into all narrow areas of the hollow layer. Then it sets, preventing it from leaking out through small holes and gaps, which do not need to be closed up in advance.


Cavipor® is a mechanically blown foam just with pressurized air, 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.


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.

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.

Cavipor foaming process 16_9.jpg

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 filling 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. 



B 001 Labor Cavipor Schäumversuche

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).

    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 30 g/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.


Are you interested in more details about Cavipor?

Please get in touch with us.

Our distribution partner:

Deutsche Isolahn Werke GmbH

Durolanweg 1

26441 Jever

+49 (0)4461 917070

Iso-Team Bocholt

Ferdinand-Braun-Straße 13

46399 Bocholt

+49 (0)2871 99 599 44

Our technology partner:

Mahr Unipre GmbH

Langenwiedenweg 94

59457 Werl

+49 (0)2922878400