Precote® 30/80/85 | Bossard Group

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Precote® 30/80/85

  

Precote® 30/80/85 is a varnish-like pre-coating system on base of microencapsulated acrylates for locking and sealing of threaded parts. Its characteristics as a sealing and locking element become effective only on assembly, when the capsules are ruptured by shear and/or pressure stress and the adhesive is allowed to cure.

Features:

  • Locking effect according to DIN 267 part 27
  • Additional sealing in the thread
  • Dry, tack-free and physiologically harmless film
  • Captive part of the thread
  • Avoids corrosion in the threaded connection
  • Good chemical resistance e.g. to fuels, hydraulic fluids, liquid coolants etc.

 Internal thread must have a countersink (no sharp-edged threads inserts), otherwise the patch could be peeled off when the screw is installed. The female thread must be dry, free of dirt, oil, separating agents and other contaminations. Thread friction value must be considered when mounted.

 Screws locking against loosening. Fast curing, no post curing even after repeated temperature exposure. For thread ≤ M6 or 1 mm pitch of thread we recommend further clarification for safe-guarding relating to curing and security function.

Threaded parts from M3 to M36. Vehicle construction as well as for safety components.

Precote® 30

  • Color yellow
  • Thread fiction 0,10 to 0,15
  • Temperature range –60 °C to 150 °C
  • Application For thread sealing and medium strength thread-locking, easy disassembly, no post-curing 

Precote® 80

  • Color red
  • Thread fiction >0,25
  • Temperature range –60 °C to 170 °C
  • Application Universal screw locking system, high strength

Precote® 85

  • Thread fiction 0,10 to 0,15
  • Temperature range –60 °C to 170 °C
  • Application Universal screw locking system, high strength, low thread friction value

All values refer to M10 black tempered screws (thread pairing medium tolerance range), coating length A, 360° all round.