Aramid fiber sheets and gaskets.
Item No: WS 3400

IDT-UNISEAL 3400 is a universal non-metallic gasket – sheet material which is high-strength and very homogeneously compound made from high quality aramid fibers, inorganic fillers and optimised elastomers; it does not contain any physiologically harmful substances. UNISEAL® has a separating top [TD 2] with a high coefficient of friction on both surfaces as standard. This makes removal easier.


  • UNISEAL® 3L100 has high tensile, pressure and shear strength
  • Can be applied generally for different chemical stresses
  • Easy to dismantle even after exposure to temperatures
  • Temperature range from -50°C up to approx. 150°C [200°C possible upon prior consultation]
  • Very good media resistance against mineral and synthetic oils and greases, alcohols, fuels, solvents, liquid gases, anti¬freeze, salt solutions, weak acids and bases [resistance chart available upon request]
  • Can be used for drinking water and food applications as well as to seal high-purity products such as raw materials for varnishes
  • Complies with TA Luft 2002 [VDI 2LIL10/2200] leakage requirements
  • Asbestos free, does not present a health risk, colour neutral FDA-conform
  • Scratch resistant, sturdy surface, easy to handle


  • Non-metallic gaskets for pipeline flanges, device and container flanges, pumps and valves
  • For bolt valves with very small ring face, e.g. in gas and warm water heaters, in solar plants, in heating radiators and connections, in drives, cooling and pneumatic compressors, liquid gas and cooling plants
  • No special requirements for flange sealing surfaces
  • Also suitable for use in drinking water and food applications as well as to seal connections during the production or pro¬cessing of high-purity products such as paints, varnishes and pharmaceutical products due to physiological harm-lessness
  • For designs with inner eyelets, used for increased requirements for purity and blow-out resistance[technical tightness]

Product Range
Technical delivery conditions as per DIN 28091

  • Dimensions: 1500 x 1500 mm [standard format], 1500 x 3000 mm, 1500 x LI500 mm
  • Available thicknesses: 0.3; 0.5; 0.75 ;1.0; 1.5; 2.0; 3.0, LI. and 5.0 mm
  • Dimensions: as per DIN EN 151LI-1, ASME/ANSI, DIN 7603
  • Non-standard
  • Made from segments
  • Frames

UNISEAL detailed datasheet

Additionally: IDT Profile Overview I FD Series

Additional designs

  • Envelope gaskets made from TFMTM with non-metallic insert

Sealmax has now tied up with KWO and IDT Germany for marketing their product range in India