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KLINGER®Flexible Graphite HL

The flexible industrial grade graphite standard sheeting with superior chemical resistance. 

KLINGER®Flexible Graphite HL combines easy handling with outstanding long term sealing performance. The flexible graphite material is highly compressible & compactable allowing for low gas permeability with low electrical resistance. The grade is especially superior working with enamel surface as well as against strongly corrosive media.

Basis composition

Flexible graphite foil.

Areas of application

KLINGER®Flexible Graphite HL is recommended for applications in which graphite is the material of choice and minimal fugitive emissions are required.


General industry / Chemical / Oil & Gas / Energy / Pulp & Paper / Marine / Automotive

KLINGER®Flexible Graphite HL - the flexible graphite standard.

Key features

  • Unique non-metallic reinforcement
  • Excellent chemical resistance
  • High temperature resistance


  • Easy to cut
  • Safe handling
  • Excellent tightness

Typical technical data for thickness 2 mm

Density of the graphite layer

DIN 28090-2



Purity of Graphite

DIN 51903 % > 99.0



% 40-50



% 8-15

Stress relaxation DIN 52913

16 h/ 50 MPa/ 300°C

MPa ≥ 46

KLINGER cold/hot compression 
50 MPa

Thickness decrease at 23°C Thickness decrease at 300 °C


Specific leak rate 

DIN 28090-2 mg/ s x m°C < 0.10

Chloride content of graphite layer

DIN 28090-2 ppm ≤ 50

Dimensions of the standard sheets

Sizes 1000 x 1000 mm, 1500 x 1500 mm, 2000 x 1000 mm or as roll per request.
Thicknesses 0.8 mm, 1.0 mm, 1.5 mm, 2.0 mm, 3.0 mm
Tolerances Thickness ±5 %
Length ±5 mm, Width ±5 mm

Other graphite qualities, thicknesses and sizes on request.

Function and durability

The performance and service life of KLINGER gaskets depend to a large extent on proper storage and fitting - factors beyond the manufactor’s control. We can, however, vouch for the excellent quality of our products. With this in mind, please also take note of our installation manual.


Below you can find more product-related information.

Industries who we work with
KLINGER Industry KLINGER Industry Chemical KLINGER Industry Oil Gas KLINGER Industry Energie KLINGER Industry Infrastructure KLINGER Industry Papier und Zellstoff KLINGER Industry Transport KLINGER Industry Pharma
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