Glysofor Solar AF is an environmentally friendly solar fluid based on propylene glycol in combination with corrosion inhibitors and stabilisers.

Glysofor Solar AF fulfils the requirements of DIN 4757 Part 3 or DIN EN 12975 for solarthermal plants. Glysofor Solar AF is used in both vacuum tube solar plants and plate collector solar plants.

Due to its physiological and ecological harmlessness, it can be used both in the food and beverage sector as well as in pharmaceutically and ecologically sensitive areas of application.

Glysofor Solar AF can be used as a frost protection agent, an anticorrosive agent and a heat transfer medium.

Typical areas of application

Vacuum tube solar plants and plate collector solar plants

Packaging sizes

  • 25 kg / 30 kg PE canister
  • 220 kg Barrel
  • 1.000 kg IBC
  • 24.000 kg Tank vehicle

The thermodynamic properties and other specific product features available to download in PDF format.

Antifreeze protection

Glysofor Solar AF is delivered ready for use and offers a reliable antifreeze protection up to:

-28 °C at 100%

Further information

Glysofor AF optimally prevents frost damage, corrosion, debris, accumulation of mud or biofilms. With a glycol base – in this case monopropylene glycol – the freezing point of Glysofor Solar AF is significantly lowered, thus ensuring that solar systems can be safely operated even at minus temperatures. If any damage occurs to the system, a simultaneous frost-related explosive effect can be reliably prevented using Glysofor Solar AF. Thanks to a complex combination of anticorrosion additives, metals are optimally protected against corrosive attacks. This anticorrosive protection can be used for all important metals that are usually used in solar installations. Installations made of copper, brass, solder, grey iron, aluminium, steel and iron are optimally protected, even if they are used in multi-metal installations. Glysofor Solar AF is completely free of nitrites, amines, phosphates, silicates and borates. It is biodegradable and environmentally friendly. Glysofor Solar AF is resistant in the long-term against the formation of biofilms, putrescence and microbiological degradation, thus preventing precipitations and the accumulation of mud. Glysofor Solar AF does not separate, even during prolonged plant shutdowns. This guarantees a year-round, long-term and low-maintenance operation of plants that have been filled with Glysofor Solar. Glysofor Solar AF is delivered ready to be filled in, with a frost protection value of -28 degrees C.

As per the valid national and international classification guidelines, Glysofor Solar AF is not a hazardous substance. There is no toxic effect from the concentrate, nor from its dilution. The product is odourless and dermatologically safe. No irritation occurs that can lead to inflammation of the skin or mucous membrane. Glysofor Solar AF is free of nitrites, phosphates and amines. The raw materials contained in this product possess the highest possible degree of purity. Glysofor Solar AF is formulated on a 1.2 propylene glycol base, which fulfils the requirements of the DAB as well as the European Pharmacopoeia and the US Pharmacopeia. As an additive, 1.2 propylene glycol has been approved as per the Ordinance on Additives in Foodstuffs (effective 10/07/1984) as a solvent and extraction agent (BGB1.I S897, Enc. 2, List 9). In the USA, propylene glycol is categorised as a generally harmless food additive (Federal Register, Effective 01/04/1985, § 184.1666). Glysofor Solar AF, and its dilutions, are readily biodegradable. Glysofor Solar AF is classified in the lowest water pollution class WPC 1 (slightly hazardous to water). No workplace-related safety measures are necessary when handling this product. Glysofor Solar AF is non-flammable; it has not been classified in one of the hazard classes for flammable liquids. Glysofor Solar AF is not subject to labelling and not considered a hazardous substance in the national / international transport regulations. The delivery container consists of homogeneous PE and can be recycled after use. The product should be stored in a sealed state at all times. Due to the existing, extremely high level of purity, the product should not be decanted or contaminated with other substances.

Chemical name 1.2 propylene and higher glycols, Aqua Dest., anticorrosion additives
Appearance Yellow liquid
Packaging Canisters / barrels / IBCs / tank vehicles
ADR KI 0 Ziff
Labelling omitted
Density 1,03 g/cm3
Freezing point -28 °C
Specific heat 3,54 kJ/kg K (at 20 °C)
Thermal cond. 0,365 W/mK (at 20 °C)

Other information

Pure water/glycol mixtures have very distinctive corrosive properties. You must therefore never use pure water/glycol mixtures without inhibitor equipment.

Glysofor Solar AF is delivered ready for use and offers a reliable antifreeze protection up to -28 degrees Celsius.

As an alternative to a product that is pre-ready to be filled in, Glysofor Solar is also available as a concentrate. Our products Glysofor N and Glysofor L are available for other areas of application.

This data is for information purposes only and does not release from the obligation to carry out a proper material testing upon arrival. The data is based on our current state of knowledge and is not meant to guarantee specific properties. It is meant to describe our products with regard to their composition and shall offer application advice. Possible industrial property rights of third parties and the suitability for a special application purpose are to be observed and verified by the user.

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the best product for your application.