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KLINGER®top-chem 2005


High chemical resistance in strong acidic applications

KLINGER®top-chem 2005 offers outstanding performance and high chemical resistance in strong acidic applications. The material is suitable for a wide range of applications in the chemical industry. KLINGER®top-chem 2005 is resistant to cold flow and has very good mechanical properties at medium temperatures. This material also meets FDA conformity.

Basis: PTFE filled gasket material with inorganic fillers.

KLINGER®top-chem 2005

Typical Values Refer to 2.0 mm Thick Material

Compressibility ASTM F36 M 4 %
Recovery ASTM F36 M 40 %
Stress relaxation DIN 52913
  30 MPa, 16 h/150°C

25 MPa
KLIGER Cold/Hot Compression Test 50MPa
  Thickness Decrease 73°F (23°C)
  Thickness Decrease 500°F (260°C)

5 %
35 %
Tightness DIN 28090-2 0.02 mg/s x m
Thickness/Weight Increase
  H2SO4, 100%, 18 h/23°C
  HNO3, 100%, 18 h/260°C

1 / 1 %
1 / 2 %
Density 2.2 g/cm3
Average surface resistance pO 3.1x10E13 Ω
Average specific volume resistance pD 3.2x10E13 Ω cm
Average dielectric strength Ed 23.8 kV/mm
Average power factor 50 Hz 0.071 tanδ
Average dielectric coefficient 50 Hz 3.2 εr
Thermal conductivity λ 0.42 W/mK
Color Orange


» BAM tested
» WRAS approval
» KTW-Guideline
» TA-Luft (Clean air)
» FDA conformity
» Regulation (EU) No. 1935/2004
» Mainly for use in alkaline
» Resistant to cold flow
» Consistent material composition
» 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.