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Kavarmat s.c. - the Cleansulation company

We have been manufacturing textile insulation for more than thirty years.

We are original equipment manufacturers for well-known manufacturers of engines, construction machinery, mobile energy generators and exhaust gas aftertreatment systems

Karlheinz Sommer



the company founder, Mr. Karlheinz Sommer, in the 1980s during the assembly of a MAN GHH turbine

wilder Teich


We have been manufacturing calcium-free or low-calcium insulation elements exclusively since 2020

calcium-containing insulating materials tends to the formation of calcium chromate, a carcinogen and extremely polluting Chromium (VI) compound.


More than 95% of all insulating materials and systems used today contain calcium; depending on the choice of material with a mass content of sometimes up to 40%.

calcium chromate can arise when calcium-compounds come in contact with chrome-compounds at higher temperatures (approx. 300°C) and become a hexavalent chromium compound in a so called "high oxidation"


Since today's insulating elements in particular consist of fabrics reinforced with stainless steel wire or are additionally provided with a knitted stainless steel wire mesh on the hot side, there is no need for a chromium-hot part to be insulated to start the formation process; the chrome-parts of the fabric wire reinforcement or the knitted fabric are often enough to start the thermochemical chain reaction with the calcium-containing insulating material.

When dismantling the insulating elements that were used as engine or turbine insulation,   the resulting Chromium (VI) compounds in the form of fiber dusts or yellowish powder(chromate dust) is released.


calcium chromate is classified as carcinogenic(H350) and acutely toxic to the environment with long-term consequences for aquatic life(H410) and is defined as dangerous substance (SVHC - "substance of very high concern") and  REACH-listed.

Contaminated insulating elements may only be disposed of as hazardous waste and must not be reused under any circumstances.

The operator of the energy-generating systems, as well as service personnel commissioned with maintenance work, are obliged under the Occupational Health and Safety Act (for Germany: ArbSchG) and Ordinance on Hazardous Substances (for Germany: GefStoffV) to take immediate measures as part of a risk assessment.

If the formation of hazardous substances can be prevented, the so-called "substitution obligation" applies in almost all countries, which means that the formation of substances that pose a risk to humans and/or the environment must be reduced or -at best- completely prevented.

In this respect, the substitution formula for future revisions (overhauls) and new insulation products must be:

None or very little calcium in insulating materials or systems

No calcium chromate-formation on dismantled insulating elements and the previously insulated hot parts

Kavarmat® - the Cleansulation company offers two product lines:

kavarmat® pure - calcium-free and heat-retaining textile insulation and

kavarmat® composite - low-calcium and heat-retaining textile insulation

Both at kavarmat® pure, as well as at kavarmat® composite


are manufactured of materials , made from alkali- or alkaline-earth-free materials, sold under the brand name

#Bergkristall - calcium-free high-temperature quartz fiber mats and tissues


and also sold individually, so that when especially using our insulating pillows no chromates (calcium chromate, sodium chromate, potassium chromate) could be formatted.

kavarmat® composite, the low-calcium and heat retaining textile insulation system consists of a poor in calcium outer fabric, provided with an oil and water repellent silicone coating.

All contact materials where a connection with chromium containing parts to be isolated cannot be ruled out are made of calcium-free #Bergkristall-Products.


The calcium content of kavarmat® composite is only 3% (approx. 60g/sqm), while today's textile insulation systems have a calcium content of between 600 and 1,500 g/sqm (15-40%)!


A substitution of calcium-containing insulation materials and systems with kavarmat® pure oder kavarmat® composite is therefore technically possible without any problems and offers another and very pleasant advantage, because especially when using  kavarmat® pure you will quickly notice:

I#itdoesntitch, so it's really #nonitchy - and so every service technician who has had to deal with dusty and scratchy used insulation systems quickly becomes enthusiastic the new





#happyfitter - installing Kavarmat pure, the calcium-free insulation
#happyfitter - non-itching insulation

Safety for:


When using Kavarmat products, according to the current state of the art, no substances are released that can damage or pollute the health of the user.


The selection of suitable insulation materials also protects the objects to be insulated, such as engines, turbines or pipelines, from overheating and material fatigue and prevents inflammation of components close to the building.


Uninsulated heat wastes energy. High-temperature insulation from Kavarmat supports the storage and use of heat and thus reduces CO2 emissions. Calcium-free insulation materials prevent the release of environmentally harmful substances.

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