HIghtec antifreeze Coolant FCC 5

specialized coolant for fuel cells and high-voltage systems

the new generation of electrically non-conductive coolants

HIGHTEC ANTIFREEZE COOLANT FCC 5 has been specially developed for PEM fuel cells, charging cables and balance-of-plant systems.
It combines extremely low electrical conductivity with high material compatibility and lasting stability for maximum safety and efficiency.

WHY DO FUEL CELLS NEED SPECIAL COOLANTS?

Fuel cells generate heat continuously and only work reliably if the coolant is thermally stable.
At the same time, they are extremely sensitive to conductive impurities: Even low concentrations of ions can cause leakage currents, sensor errors or safety shutdowns.
Very low conductivity levels are therefore required for stable operation.

Why conventional coolants fail here

Conventional water-glycol coolants dissolve ions from metals, seals and component surfaces during operation.
As a result, the electrical conductivity often increases significantly after a short period of use - with potential effects on safety and system stability.

Typical consequences are

Leakage currents and
Potential carry-over

high monitoring
and maintenance costs

Necessity of
ion exchangers

Our solution:
HIGHTEC ANTIFREEZE
COOLANT FCC 5

FCC 5 minimizes ion input and remains permanently below 5 µS/cm - even under thermal load.
FCC 5 therefore enables stable operation without ion exchangers (in clean systems) and reduces the complexity of the overall system.

FCC 5 thus solves the problem at the source: it is permanently stable, does not require an ion exchanger in normal operation (in clean systems) and is robust against thermal stress.

HIGHTEC ANTIFREZE COOLANT FCC 5 in a system comparison:

Electrical conductivity is a key functional and safety parameter in modern HV and fuel cell systems.

FCC 5 is therefore in a technical category of its own - optimized for electrical safety in modern high-voltage systems.

Product benefits at a glance

Permanently low conductivity

electrical safety in sensitive systems

High material compatibility

Protection against metals, plastics, elastomers

Reduced system complexity

Ion exchanger not required in continuous operation

Less maintenance,
lower operating costs

Biodegradable
according to OECD 301 B (≥ 60 %)

Typical areas of application

PEM fuel cells
(mobile & stationary)

Charging cable and plug coolants

Areas with high frequencies and large temperature differences

Practical comparison:

Water-glycol vs. FCC 5

FCC 5 simplifies system design, reduces maintenance costs and increases operational reliability - in contrast to conventional water-glycol solutions, which rely on ion exchangers and regular conductivity checks.

Operation & care

Rinse with original product before initial filling to remove residues
Check conductivity, pH and metal ions regularly
Do not mix with standard coolants
Only use product in its original state - do not dilute with water

FAQs -
Frequently asked questions

To avoid leakage currents and potential carry-over and to protect sensitive components - even at high voltages.
No. In clean systems, rinsing before filling is sufficient. A permanent ion exchanger is not required as FCC 5 keeps the conductivity stable at a low level.
Yes, OEMs define typical target values, e.g. <5 µS/cm for fuel cell circuits. International standards such as ASTM D8566 support these requirements.
No. Only use FCC 5 as a finished product, as the water quality is crucial.
Modern HV systems permanently monitor conductivity. If the threshold value is exceeded, leakage currents, potential carryover and fault currents can occur. To prevent damage, these systems trigger automatic safety shutdowns.
Fuel cells are extremely sensitive to conductive impurities. Below 5 µS/cm, leakage currents, sensor errors and safety shutdowns are reliably avoided.
No. FCC 5 was specially developed for fuel cell systems. BEV systems require completely different thermal and electrical power profiles.
Yes, FCC 5 contains special, non-conductive and non-dissociating corrosion protection inhibitors that reliably protect all relevant metal and material combinations in fuel cell systems - including aluminum, stainless steel, copper alloys and sensitive elastomers. The additives are balanced in such a way that they do not increase electrical conductivity and remain stable even under continuous load.

In addition, FCC 5 contains a powerful antioxidant and anti-ageing system that neutralizes thermally generated degradation products of the ethylene glycol. This prevents an increase in conductivity and ensures the long-term stability of the coolant.

FCC 5 thus offers complete material protection without impairing the low conductivity that is crucial for fuel cells.

Secure information now

Product data sheet

Safety data sheet

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fCC 10 is the specialized coolant for fuel cells and high-voltage systems.
Electrical safety, material compatibility and long-term stability - with less complexity and lower operating costs.