Gaskets and Sheet Jointings

Teadit 25BI

Teadit 25BI Teadit 25BI is a multi-directionally expanded gasket tape, produced by Teadit International from 100% pure PTFE, and supplied with an adhesive backing. It is white in colour.

A special manufacturing process results in almost equal tensile strength in both the longitudinal and cross direction. As a result, the material resists spread under compression - in contrast to normal expanded PTFE tapes. This means the product is extremely well suited for narrow sealing areas and in all applications where a defined gasket width (under load) is required.

Typical applications
Flanges with irregularities on sealing surfaces, and stress-sensitive joints. Enamelled and glass flanges, large flanges, heat exchangers,  pressure vessels, suction filters and strainers, etc. 

Prime features

  • Quick and simple installation, with no pofile cutting or hole punching required.
  • Easy to remove without leaving any residue.
  • Excellent malleability for overcoming minor damage and irregularities on sealing faces.
  • Reduces material wastage - no off-cuts.
  • Chemically resistant to most media in the range pH 0-14. Exceptions include molten alkali metals and elemental fluorine at high tempoerature and pressure.


  • TA-Luft to VDI 2440.
  • Conforms to FDA 21 CFR 177.1550 (PTFE tape).
  • Conforms to FDA 21 CFR 175.105 (adhesive).

Service capabilities

  • Operating temperature (maximum): +260°C; with short excursions to +310°C.
  • Operating temperature (minimum): -240°C
  • Pressure range: Vacuum to 20 MPa/200 bar.

How it is supplied 
Spools of tape with adhesive backing. Thicknesses: 2 mm, 3 mm, 6 mm, 9 mm. Widths from 10 mm to 65 mm depending on thickness.