Description

Glysofor ELP-KI is an KI-based product based on high-purity propylene glycol, which has a particularly low electrical conductivity thanks to a special manufacturing process. The use of a specifically selected combination of inhibitors ensures excellent corrosion protection for a wide range of metals and alloys typically used in water circuits and cooling systems.
The product is used in particular in technical applications where extremely low electrical conductivity is required.
Compared to MEG-based products, Glysofor ELP KI is characterized by comparatively higher thermal resistance and complete labeling exemption in accordance with CLP/GHS.
Glysofor ELP-KI is available both as a highly concentrated ultra-pure product and as a ready-to-use aqueous solution. The ready-to-use solutions are produced exclusively with ultra-pure water with an electrical conductivity of less than 0.1 µS/cm.
Glysofor ELP KI optimally prevents frost damage, corrosion, deposits, sludge formation, and biofilms in water circuits.
The product is classified in the lowest water hazard class WGK 1, both as a concentrate and when diluted with water.
Specific electrical resistance at 20 °C (M ohm cm) min. 10
Specific electrical conductivity at 20 °C (μs/cm) max. 0,1
Dielectric constant approx. 28
Glysofor ELP KI is miscible with water, ethanol, butanol, butyl acetate, and acetone in any ratio.
For subsequent adjustment of solutions, we supply high-purity water with an electrical conductivity of < 0.1 µs/cm.

Typical areas of application

Aqueous solutions of Glysofor ELP-KI are used in water circuits which require extremely low electrical conductivity.

  • Induction melting furnaces
  • Transformer cooling systems

  • X-ray tubes

  • Capacitors

  • Converter cooling systems

  • Inverter cooling systems

  • Circuit breakers and inverters

  • Welding systems

  • Electrolyte production
  • High-voltage architectures (400 V – 800 V)
  • Battery modules with cold plate cooling

Packaging sizes

  • 25 kg / 30 kg PE canisters
  • 220 kg PE drum
  • 1,000 kg IBC
  • 24,000 kg tanker truck
Specification

The thermodynamic properties and other specific product characteristics are available for download as a PDF file.

Antifreeze protection

depending on the concentration

Prevents freezing down to -11 °C at 25%
Prevents freezing down to -14 °C at 30%
Prevents freezing down to -18 °C at 35%
Prevents freezing down to -22 °C at 40%
Prevents freezing down to -26 °C at 45%
Prevents freezing down to -32 °C at 50%
Chemical name 1.2 Propylene glycol
Appearance Colorless liquid
Packaging Canisters / drums / IBCs / tank vehicles
ADR CI 0 No.
WGK 1
Label Not applicable

Antifreeze

Glysofor ELP-KI significantly lowers the freezing point of water, preventing freezing in water circuits and cooling systems.
Water circuits can be temporarily shut down with Glysofor ELP-KI even in frosty conditions, but remain operational at all times.
Homogeneously mixed aqueous solutions do not separate during system shutdowns.

Application in electromobility

Glysofor ELP-KI is a specially developed coolant with very low electrical conductivity (< 100 µS/cm) for use in electric vehicles and high-voltage systems. In modern electric vehicles, precise and safe thermal management is crucial, as batteries, power electronics, and electric motors generate considerable amounts of heat during operation and charging.
Glysofor ELP-KI offers a high level of electrical safety, especially in cold plate battery cooling systems, where the coolant circulates in close proximity to high-voltage components. Its permanently low conductivity significantly reduces the risk of short circuits, electrochemical corrosion, and gas formation, even in the event of leaks.
Compared to conventional coolants, Glysofor ELP-KI supports efficient heat dissipation, stable operating temperatures, and thus consistent performance of battery and drive systems. This contributes significantly to the extended service life of critical components, energy efficiency, and operational safety of electric vehicles.
Glysofor ELP-KI meets the requirements of relevant international standards such as ASTM D8566 and GB/T 29743.2, making it ideal for use in future-oriented vehicle concepts and electrified platforms.

Advantages

• High electrical safety even in the event of leaks
• Permanently stable, low electrical conductivity
• Reliable corrosion protection for aluminum and copper
• High thermal and chemical stability
• Easy integration into existing cooling and thermal management systems

Result:

Greater safety, longer battery life, and reliable performance in modern electric vehicles.

Application in high-voltage electrical environments

Glysofor ELP KI has established itself as the preferred heat transfer medium for cooling applications in power electronics, particularly in frequency converters, rectifiers, and medium- and high-voltage applications.
The product is used in direct cooling, for example in power semiconductors such as IGBT modules, cold plates, and cooling plates.
Due to its very low electrical conductivity and its complex inhibition, which deliberately avoids ionic components, Glysofor ELP KI reliably reduces the risk of creepage and leakage currents, the destruction of IGBT modules, and electrochemical corrosion on all materials used in the cooling circuit.
Thanks to its electrically insulating properties, the heat transfer fluid helps prevent galvanic corrosion in the long term, thereby supporting the insulation concept of the entire system.
At the same time, Glysofor ELP KI facilitates compliance with relevant standard requirements, for example with regard to insulation coordination, leakage current limitation, and protection against electric shock in accordance with IEC and VDE specifications, depending on the respective system design.
Due to its special formulation, Glysofor ELP KI has a conductivity of < 0.1 µS/cm, making it suitable for use in the primary circuit.

Application in welding technology

Glysofor ELP KI is a liquid coolant for technical cooling systems with high thermal loads and increased requirements for media purity. It is particularly suitable for cooling liquid-cooled welding torch systems at high currents and long duty cycles, where gas-cooled systems reach their limits.

Thanks to its very low electrical conductivity, which is significantly below the recommended limits specified by equipment manufacturers, Glysofor ELP KI significantly reduces the risk of electrochemical corrosion. Copper, brass, solder, steel, iron, and aluminum components are reliably protected, while electrocorrosion, deposits, and blockages in the cooling system are significantly minimized.

Glysofor ELP KI ensures efficient heat dissipation, stable temperatures, and long-term protection of the welding torch, cooling circuit, pump, tank, cooler, and power source. It is designed for continuous operation in circulating cooling devices and liquid-cooled welding systems and represents a safe, long-lasting alternative to water.

Thermodynamic properties

Temp.

[°C]		 Thermal cond.

[W/m K]		 Spec. heat

[kJ/kg K]		 Density

[g/cm3]		 Kin. viscos.

[mm2/s]		 Cub. expan. coeff.

[K-1]		 Rel. press.

[Factor]
-10 0,375 3,86 1,032 9,44 0,00014 1,70
0 0,399 3,89 1,030 5,69 0,00023 1,48
10 0,424 3,92 1,027 3,69 0,00031 1,31
20 0,448 3,94 1,023 2,54 0,00038 1,20
30 0,472 3,96 1,019 1,83 0,00045 1,10
40 0,496 3,99 1,014 1,40 0,00051 1,04
50 0,519 4,02 1,009 1,11 0,00056 0,97
60 0,545 4,04 1,003 0,92 0,00061 0,92
70 0,569 4,06 0,997 0,78 0,00064 0,88
80 0,594 4,09 0,990 0,67 0,00067 0,84
90 0,617 4,12 0,983 0,59 0,00060 0,81
100 0,641 4,14 0,976 0,53 0,00070 0,80

Temp.

[°C]		 Thermal cond.

[W/m K]		 Spec. heat

[kJ/kg K]		 Density

[g/cm3]		 Kin. viscos.

[mm2/s]		 Cub. expan. coeff.

[K-1]		 Rel. press.

[Factor]
-10 0,358 3,76 1,039 12,09 0,00022 1,74
0 0,381 3,79 1,036 7,18 0,00030 1,52
10 0,403 3,82 1,032 4,56 0,00037 1,34
20 0,425 3,86 1,028 3,08 0,00044 1,23
30 0,448 3,89 1,023 2,19 0,00051 1,13
40 0,471 3,92 1,018 1,65 0,00054 1,06
50 0,494 3,95 1,012 1,29 0,00050 1,00
60 0,516 3,99 1,006 1,05 0,00063 0,93
70 0,539 4,02 0,999 0,87 0,00066 0,89
80 0,562 4,05 0,992 0,75 0,00068 0,85
90 0,584 4,08 0,985 0,66 0,00060 0,82
100 0,606 4,10 0,978 0,57 0,00073 0,80

Temp.

[°C]		 Thermal cond.

[W/m K]		 Spec. heat

[kJ/kg K]		 Density

[g/cm3]		 Kin. viscos.

[mm2/s]		 Cub. expan. coeff.

[K-1]		 Rel. press.

[Factor]
-10 0,346 3,67 1,046 16,08 0,00031 1,97
0 0,367 3,71 1,042 9,05 0,00037 1,66
10 0,386 3,74 1,038 5,52 0,00043 1,44
20 0,407 3,77 1,033 3,63 0,00048 1,29
30 0,427 3,81 1,028 2,53 0,00053 1,18
40 0,447 3,85 1,022 1,87 0,00056 1,09
50 0,467 3,88 1,016 1,47 0,00061 1,03
60 0,488 3,92 1,010 1,19 0,00064 0,97
70 0,508 3,95 1,003 1,00 0,00067 0,91
80 0,528 3,99 0,995 0,84 0,00071 0,88
90 0,548 4,02 0,988 0,73 0,00072 0,85
100 0,568 4,05 0,981 0,62 0,00074 0,83

Temp.

[°C]		 Thermal cond.

[W/m K]		 Spec. heat

[kJ/kg K]		 Density

[g/cm3]		 Kin. viscos.

[mm2/s]		 Cub. expan. coeff.

[K-1]		 Rel. press.

[Factor]
-20 0,317 3,54 1,057 44,69 0,00037 2,43
-10 0,335 3,58 1,053 21,38 0,00041 2,01
0 0,353 3,62 1,048 11,39 0,00044 1,71
10 0,369 3,65 1,043 6,68 0,00048 1,49
20 0,388 3,69 1,038 4,26 0,00052 1,33
30 0,406 3,73 1,032 2,95 0,00055 1,22
40 0,423 3,77 1,026 2,17 0,00060 1,13
50 0,441 3,79 1,020 1,68 0,00062 1,06
60 0,459 3,84 1,013 1,35 0,00065 1,01
70 0,476 3,88 1,006 1,13 0,00068 0,94
80 0,493 3,92 0,998 0,94 0,00073 0,91
90 0,512 3,95 0,991 0,81 0,00076 0,88
100 0,529 3,98 0,984 0,68 0,00077 0,85

Temp.

[°C]		 Thermal cond.

[W/m K]		 Spec. heat

[kJ/kg K]		 Density

[g/cm3]		 Kin. viscos.

[mm2/s]		 Cub. expan. coeff.

[K-1]		 Rel. press.

[Factor]
-20 0,306 3,43 1,063 60,19 0,00043 2,75
-10 0,323 3,47 1,058 27,48 0,00046 2,26
0 0,339 3,51 1,053 14,19 0,00049 1,88
10 0,355 3,55 1,048 8,12 0,00052 1,67
20 0,372 3,58 1,042 5,11 0,00056 1,46
30 0,386 3,63 1,036 3,47 0,00059 1,29
40 0,402 3,67 1,030 2,54 0,00062 1,20
50 0,418 3,71 1,023 1,95 0,00065 1,12
60 0,434 3,75 1,016 1,57 0,00068 1,05
70 0,449 3,79 1,009 1,28 0,00071 0,98
80 0,466 3,83 1,001 1,09 0,00074 0,91
90 0,483 3,87 0,994 0,92 0,00077 0,89
100 0,499 3,91 0,986 0,75 0,00079 0,87

Temp.

[°C]		 Thermal cond.

[W/m K]		 Spec. heat

[kJ/kg K]		 Density

[g/cm3]		 Kin. viscos.

[mm2/s]		 Cub. expan. coeff.

[K-1]		 Rel. press.

[Factor]
-30 0,278 3,28 1,074 210,98 0,00045
-20 0,295 3,32 1,069 80,19 0,00048 2,79
-10 0,309 3,36 1,064 35,19 0,00051 2,29
0 0,325 3,39 1,058 17,58 0,00053 1,91
10 0,339 3,44 1,052 9,82 0,00056 1,70
20 0,354 3,49 1,046 6,07 0,00058 1,48
30 0,369 3,53 1,040 4,08 0,00061 1,31
40 0,384 3,57 1,033 2,95 0,00064 1,22
50 0,397 3,61 1,026 2,26 0,00067 1,14
60 0,412 3,65 1,019 1,79 0,00070 1,07
70 0,427 3,69 1,012 1,48 0,00072 1,01
80 0,442 3,74 1,004 1,23 0,00075 0,93
90 0,458 3,78 0,996 1,03 0,00077 0,91
100 0,474 3,82 0,989 0,82 0,00081 0,89
This information is provided for informational purposes only and does not release you from the obligation to carry out a proper incoming goods inspection. The information is based on our current knowledge and does not constitute a guarantee of specific properties. It is intended to describe the nature of our products and provide guidance on their use. Any third-party property rights and suitability for a specific application must be observed or checked by the user.

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