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KLINGER®top-chem 2000


Exceptional performance at high mechanical requirements

KLINGER®top-chem 2000 is a universal heavy-duty gasket material which offers exceptional performance in applications with high mechanical requirements at high temperatures. It is the only PTFE gasket material with a Fire-Safe Certificate.

Use KLINGER®top-chem 2000 in strongly acidic and alkaline applications as well as in steam and oxygen. Suitable for an extremely wide range of applications in the chemical and petrochemical industry, as well as in the ship building industry for the transport of chemicals. This material also meets FDA conformity.

Basis: PTFE Gasket material filled with SiC (Silicon carbide).
KLINGER®top-chem 2000

Typical Values Refer to 2.0 mm Thick Material

Compressibility ASTM F36 M 4 %
Recovery ASTM F36 M 50 %
Stress relaxation DIN 52913
30 MPa, 16 h/150°C
50 MPa, 16h/260°C
28 MPa
36 MPa
KLINGER Cold/Hot Compression Test 50 MPa
Thickness Decreases 73°F (23°C)
Thickness Decreases 500°F (260°C)
5 %
11 %
Tightness DIN 28090-2 0.08 mg/s x m
Thickness/Weight Increase
H2 SO4, 100%, 18 h/23°C
HNO3, 100%, 18 h/23°C
NaOH, 100%, 72 h/110°C
1 / 1 %
1 / 2 %
1 / 3 %
Density 2.5 g/cm³
Average surface resistance ρO 6.9x10E12 Ω
Average specific volume resistance ρD 2.2x10E12 Ω cm
Average dielectic strength Ed 3.6 kV/mm
Average power factor 50 Hz
0.166 tan δ
Average dielectric coefficient 50 Hz 10.6 ε r 
Thermal conductivity λ 0.60 W/mK
Color Grey


» WRAS approval
» DIN-DVGW W 270
» TA-Luft (Clean air)
» Oxygen tested
» Fire-Safe acc. to DIN EN ISO 10497
» KTW-Guideline
» FDA conformity
» Regulation (EU), No, 1935/2004
» Resistant to creep and cold flow
» Consistent material composition
» High retention of the bolt load
» Superior chemical resistance
» 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.