top of page

BARRIERTA L 25 DL is based on perfluorinated polyether oil and PTFE and thus resistant to many media such as water or hydrocarbons.

  • Do you need to attain low friction coefficients in elastomer/metal or plastic/plastic friction points over a long time and across a wide temperature range? BARRIERTA L 25 DL can help you keep friction low even at temperatures of -25°C, especially when lubricating door seals, for example in train doors. This will
  • enable you to meet requirements for low pressure variations in trains going through tunnels and constant actuating forces for doors over a wide temperature range.
  • Do your customers expect a long service life of seals, even if they are frequently exposed to direct sunlight? BARRIERTA L 25 DL absorbs some of the sunlight's UV radiation, keeping the seal pliant for longer.
  • Do you need a lubricant that is compatible with sensitive materials? Field experience has shown the product's good compatibility with many sensitive plastic materials such as PC, or with elastomers such as EPDM.
  • Do you have optical applications requiring a lubricant that does not form a condensate on lenses? With the low vapour pressure of its base oil, BARRIERTA L 25 DL offers what it takes to prevent the formation of condensates.
  • Content: 1kg can
  • Available in 200g can, 1kg can, 10kg bucket

Your benefits at a glance:

  • Compatibility with plastics and elastomers, e.g. EPDM or silicone elastomers
  • Low friction forces in plastic/plastic and elastomer/metal combinations
  • Good resistance to water
  • Slower ageing of elastomers exposed to sunlight


  • BARRIERTA L 25 DL is preferably used for lubricating seals in train doors. It has also been used as a special lubricant for optical equipment for many years.

Application notes:

  • Seals in train doors should be free from impurities prior to initial lubrication.
  • For use in precision optics, we recommend cleaning the friction point prior to initial application first with white spirit 180/210 and then with Klüberalfa XZ 3-1.
  • Then blow the surfaces with clean, dry compressed air or hot air to remove solvent residues. For initial lubrication, the friction points must be clean and bright,
  • i.e. free from oil, grease, perspiration and contamination. To optimise lubricant life, please contact our Technical Sales staff.

Product data:

Article number090020
 Chemical composition, solid lubricant PTFE
 Chemical composition, type of oil PFPE
 Lower service temperature -40°C / -40°F
 Upper service temperature 150 °C / 302 °F
 Color space white
 Density at 20 °C approx. 1.95 g/cm³
 Worked penetration, DIN ISO 2137, 25 °C, lower limit value 270 x 0.1 mm
 Worked penetration, DIN ISO 2137, 25 °C, upper limit value 300 x 0.1 mm
 Shear viscosity at 25 °C, shear rate 300 s-1; equipment:rotational viscometer approx. 4 000 mPas
 Kinematic viscosity, DIN 51562 pt. 01/ASTM D-445/ASTM D 7042, 100 °C approx. 11 mm²/s
 Kinematic viscosity of the base oil, DIN 51562 pt. 01/ASTM D-445/ASTM D 7042, 40 °C approx. 90 mm²/s
 Flow pressure of lubricating greases, DIN 51805, test temperature: -40°C <= 1 400 mbar
 Water resistance, DIN 51807 pt. 01, 3h/90 °C, rating 0 - 90
 Minimum shelf life from the date of manufacture in a dry, frostfree place and in the unopened
 original container, approx.
 60 months

Klüber BARRIERTA L 25 DL Special lubricating grease

    bottom of page