Regardless of whether your system uses wind, solar or geothermal energy to generate energy, you're helping the world make the transition to a 100 percent use of renewable energy sources. Already almost a fifth of the energy used for heating and cooling in the EU comes from renewable sources1.

Clariant's Antifrogen® fluids support the safe and sustainable operation of solar thermal systems, geothermal pumps and wind turbines.

Show More

Solar thermal collectors are based on the principle of absorbing sunlight and transferring heat, which is then absorbed by a heat transfer fluid and used for water heating. For optimum performance, you need not only an absorber with high heat capacity but also a high heat capacity fluid that can withstand the stresses of extremely high temperatures during the day and low temperatures at night and does not freeze in winter.

Our toxicologically harmless fluids based on monopropylene glycol or higher boiling glycols for highly stressed systems are always in motion to protect metal components from corrosion over a long period of time and virtually eliminate the risk of burst pipes. Our portfolio allows you to operate at constant temperatures from -50°C to 200°C (up to 270°C for short periods). If required, we also offer special cleaning agents for solar thermal systems.

In near-surface geothermal applications, the selection of the right heat transfer fluid is crucial for safe operation. Clariant's monoethylene glycol-based Antifrogen GEO provides long-term protection against frost, corrosion and limescale for heat pump installations. This is important for installations where a household can save between 30-60 % of electricity consumption compared to conventional heating and cooling systems2.

Wind power is now one of the fastest growing industrial segments in the world. Wind turbines generate between 17 and 39 times as much energy as they consume3. However, the sheer size of a turbine and its inaccessibility, especially offshore, pose significant maintenance challenges for operators. We are proud that our heat transfer fluids facilitate trouble-free and low-maintenance operations. They help to keep the rotor blades turning by cooling the generator and providing long-term protection against frost and corrosion so that electricity can continue to be generated efficiently.

Discover the potential of more sustainable renewable energy systems:

  • Solar thermal systems
  • Geothermal heat pumps
  • Cooling of frequency converters in wind turbines or photovoltaic power stations


  • Antifrogen® N

    Antifrogen® N is a liquid, tinted pale yellow, for use as a heat transfer medium in closed hot water heating systems, heat pumps and as cooling brine in industrial refrigeration equipment. Antifrogen® N is not suitable for the use in food or pharmaceutical applications. Alternatively, the use of Antifrogen® L is recommended. The product is inhibited without the use of nitrites-, amines-, borates-, silicates- and phosphates. The optimization of the corrosion inhibition system was performed without the use of CMR-substances (cancerogenic, mutagenic, reprotoxic).Read more about Clariant Heat Transfer Fluids Find a distributor more

  • Antifrogen® SOL HT

    Antifrogen® SOL HT is a physiologically harmless, yellowish, clear liquid based on an aqueous solution of higher boiling glycols, which is used as a heat transfer medium in solar heating systems, also those exposed to high thermal loads. The product is inhibited without the use of nitrites-, borates-, silicates- and phosphates. It meets the requirements of DIN 4757, part 3, for solar heating systems. The optimization of the corrosion inhibition system was performed without the use of CMR-substances (cancerogenic, mutagenic, reprotoxic).Read more about Clariant Heat Transfer Fluids Find a distributor more

Daniela Eiselin
Daniela Eiselin
Contact Person

Request to Clariant

Request to Clariant

Please enter your contact information so we are able to process your request. Thank you for your interest.

Daniela Eiselin
Daniela Eiselin
Contact Person
This information corresponds to the present state of our knowledge and is intended as a general description of our products and their possible applications. Clariant makes no warranties, express or implied, as to the information’s accuracy, adequacy, sufficiency or freedom from defect and assumes no liability in connection with any use of this information. Any user of this product is responsible for determining the suitability of Clariant’s products for its particular application.<br />
<br />
* Nothing included in this information waives any of Clariant’s General Terms and Conditions of Sale, which control unless it agrees otherwise in writing. Any existing intellectual/industrial property rights must be observed. Due to possible changes in our products and applicable national and international regulations and laws, the status of our products could change. Material Safety Data Sheets providing safety precautions, that should be observed when handling or storing Clariant products, are available upon request and are provided in compliance with applicable law. You should obtain and review the applicable Material Safety Data Sheet information before handling any of these products. For additional information, please contact Clariant.<br />
<br />
* For sales to customers located within the United States and Canada the following applies in addition: No express or implied warranty is made of the merchantability, suitability, fitness for a particular purpose or otherwise of any product or service.<br />
<br />
© Trademark of Clariant registered in many countries.<br />
® 2019 Clariant International Ltd 

You are about to leave the Clariant domain

The link you activated will take you outside the Clariant site in about 10 seconds. If you want to stop this, press "Cancel".