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KLINGER®top-chem 2003


High adaptability and tightness even at low surface loads

KLINGER®top-chem 2003 offers high adaptability and tightness even at low surface loads. KLINGER®top-chem 2003 has excellent chemical resistance in strongly acidic and alkaline applications as well as very good properties at medium temperatures and loads. This material also meets FDA conformity.

Basis: PTFE gasket material filled with hollow glass microspheres.

KLINGER®top-chem 2003

Typical Values Refer to 2.0 mm Thick Material

Compressibility ASTM F36 M 18 %
Recovery ASTM F36 M 35 %
Stress relaxation DIN 52913
  30 MPa, 16 h/150°C

13 MPa
KLIGER Cold/Hot Compression Test 25 MPa
  Thickness Decrease 73°F (23°C)
  Thickness Decrease 500°F (260°C)

10 %
39 %
Tightness DIN 28090-2 0.01 mg/s x m
Thickness/Weight Increase
  H2SO4, 100%, 18 h/23°C
  HNO3, 100%, 18 h/23°C
  NaOH, 33%, 72 h/110°C

1 / 1%
0 / 5 %
1 / 5 %
Density 1.7 g/cm3
Average surface resistance ρO 9x10E12 Ω
Average specific volume resistance ρD 2.6x10E12 Ω cm
Average dielectric strength Ed 16.7 kV/mm
Average power factor 50 Hz 0.085 tanδ
Average dielectric coefficient 50 Hz 2.8 εr
Thermal conductivity λ 0.18 W/mK
Color Off-white


  • BAM tested
  • DIN-DVGW W 270
  • KTW-Guideline
  • DNV GL
  • TA-Luft (Clean air)
  • FDA conformity
  • Regulation (EU) No. 1935/2004
  • High compressibility
  • Resistant to cold flow
  • Consistent material composition
  • Excellent sealing at low stress
  • Superior chemical resistance
  • Conforms Easily
  • No ageing of the material

The pressure/temperature graphs shown are the most current method of determining the suitability of a gasket material in a known environment. However, chemical compatibility must also be considered.
ρT diagram for thickness 2.0 mm:
klingersil top chem graph
In area 1 the gasket material is suitable using common installment practices subject to chemical compatibility

In area 2 appropriate measures are necessary for installation of the gasket to ensure maximum performance. Please call or refer to KLINGERexpert for assistance.

In area 3 do not install gaskets in these applications without first referring to KLINGERexpert or contacting KLINGER Thermoseal's technical support service.
The ability of a gasket to make and maintain a seal depends not only on the style and quality of the gasket material, but also on medium being sealed, the flange design, the amount of pressure applied to the gasket by the bolts and how the gasket is assembled onto the flanges and tightened. These factors are beyond the manufacturer's control. Please take note of our installation manual in TECHNICAL RESOURCES.