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Fuchs Hydrotherm 68 LW RED Fire Resistant Hydraulic & Lubricating Oil

Fuchs Hydrotherm 68 LW RED Fire Resistant Hydraulic & Lubricating Oil

Fuchs Hydrotherm 68 LW RED - 20L (Drum)

20L (Drum)


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  • Description
  • Benefits
  • Specifications
  • Technical Info
  • Shipping Explained

Fuchs Hydrotherm 68 LW RED Fire Resistant Hydraulic & Lubricating Oil

Lead Time Warning:

Please note that some industrial and commercial products are made to order and therefore have an extended lead time. For exact delivery timescales get in touch with the Opie Oils team.

Fire-resistant hydraulic fluid type HFC-E

HYDROTHERM 68 LW RED is a specially formulated, new generation water glycol based fire resistant hydraulic fluid that combines safety in operation with
exceptional anti-wear / extreme pressure (EP/AW) performance surpassing results previously possible from conventional water glycol fluids. It complies with the ISO Fluid HFC – E Classification.

HYDROTHERM 68 LW RED may be used in a wide variety of equipment utilising various hydraulic pumps including vane, gear and axial piston types operating over a wide temperature and pressure range.
This fluid may be used in hydraulic systems where the use of conventional mineral hydraulic oil would pose a serious fire risk, such as Die Casting, Foundries, Steel Works and Mining.

Method of Use:
To change over from mineral oil, drain and clean the system thoroughly. Drain and clean out the reservoir and drain and blow out all pipelines. Clean valves and remove pumps, accumulators and cylinders for draining where practicable.

Approximately half fill the system with HYDROTHERM 68 LW RED and run for 24 hours under no load conditions, operating all functions of the hydraulic system. Drain thoroughly and discard this flushing charge. Charge the system to half full and operate the system. Sample the fluid to ensure the flushing procedure has been successful and then fill to the correct operating capacity.

When starting up a new hydraulic system or after switching from mineral oil to HYDROTHERM 68 LW RED, the hydraulic system should be “run-in” for at least one hour at reduced pressure (20 to 40 bar).

Fluid Maintenance:
Some slight water loss from the fluid can be expected over prolonged use dependent upon operating temperature and system breathing. A reduction of the water content will increase the viscosity of the fluid. The water content of HYDROTHERM 68 LW RED should be between min. 15% and max. 25%. Thus, regular samples of the fluid should be taken to check that the water content is maintained above 15% to ensure that satisfactory fire resistance is maintained. FUCHS offer a full condition monitoring service both on and off site.

Is this the right product?

Making sure that you use the right oil, lubricant, grease or product for your commercial / industrial application is especially important when dealing with expensive machinery.

If you are unsure if this product is right for your needs or have any other questions please feel free to get in touch or use our Recommendation form.

Industrial Help / Recommendation Form

PDF Downloads:

Download the Technical PDF


  • Outstanding EP/AW performance providing excellent life to system components, FZG Load Stage 12 pass
  • Fire Resistant: - Buxton Test RI >70, pass - Complies with the British Coal 570/ 1981
  • Spray Ignition Test and the Wick Test, Will not support combustion
  • Surpasses the requirements of DSK (Deutsche Steinkohle AG)
  • Approved according to the 7th Luxembourg Report (no., Bezirksregierung Arnsberg, Abt. 8 = responsible authority in Germany)
  • Excellent corrosion protection to both ferrous and most non-ferrous components
  • Good elastomer compatibility with seals and packings normally found to be compatible with water glycols
  • Not recommended for rubber impregnated cork or leather seals


The viscosity of HYDROTHERM 68 LW RED depending on the water content

The viscosity of HYDROTHERM 68 LW RED depending on the water content

Technical Information:


Test Method
DIN 51 519


at 40ºC
at 100ºC


Viscosity index
-166DIN ISO 2909
Density at 15ºCkg/m31106DIN 51 757
Pour pointºC-45DIN ISO 3016
pH value
-9.4DIN 51 369
FZG Special test: A/8, 3/60
Failure load stage
> 12
DIN ISO 14635-1
Water content
%wt20DIN ISO 3733
Minimum recommended water content in service
%wt15DIN ISO 3733
Recommended maximum bulk fluid operating temperature

Fire resistance tests
Buxton test

Spray ignition test
Wick test


SHIPPING IS FREE* for orders of £60 and over , regardless of the weight of your order.
We've tried to keep all other shipping costs as low as we can.

Carriage starts at just £0.95 (inc VAT) for small items, with our most common courier rate set at £4.99 for orders of 5kg (enough for 5 litres of oil).

  • *Free shipping is available for UK Royal Mail, UPS Access Point™ (click & collect) and standard UK courier services (not express / priority / islands).
  • Courier surcharges mean we are unable to offer free "to the door" courier shipping from us in Cornwall up to Highlands / Grampian in Scotland - and because we send a lot of liquids, not every courier option is available to us. UPS Access Point™ (click & collect) is available as a free shipping option across Scotland, Wales and England, wherever there is a UPS Access Point™ Location.
  • Carriage charges are based on weight - please see our table of carriage costs for full details (although adding an item to your cart and viewing the calculated carriage is often easier!).
  • Priority shipping is also available.

How long will it take to get my order?

We give an estimate of delivery dates as you shop and in your basket. The vast majority of items are held in stock and dispatched from our UK warehouse and we'll do all we can to get your order to you as quickly as possible.

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