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precote 30


Thread precoating with medium strength

Description

precote 30 is a varnish-like precoating system on base of microencapsulated acrylates for sealing and locking of threaded parts. The dried film is tack-free, solvent-free and physiologically harmless. 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.
Application

On all threaded combinations which mainly require a sealing effect. The product can be applied on screws, studs and non-standardized  parts as well as on thread plugs and pipe threads. Due to the low strength an easy disassembly of the polymerised connection is possible.  For threads ≤ M6 or 1mm pitch we recommend precote 30-8.

Properties

  • Dry and tack-free film.
  • Unlosable part of the thread.
  • Threaded parts can be preapplied long time before assembly(oT coating machine).
  • Physiologically harmless as coating and on assembly.
  • Thread friction values are not altered.
  • Prevents fretting on assembly.
  • Seals against pressure up to 250 bar (3600 psi).
  • Avoids corrosion in the threaded connection.
  • Fast curing, no postcuring even after repeated temperature exposure.
  • Good chemical resistance (meets the relevant automotive specifications)


SPECIFICATION:

Colour: yellow
Thread friction value* μthread 0.10 – 0,15
curing time* ( RT ) 6 h
prevailing-in torque PIT on assembly* 0.5 - 1 Nm
strength without preload BAT* oT-standard 2.7.1** resp. DIN 267, part 27 min. 8 Nm
strength ratio BLT/MAa*
oT-standard 2.7.3** resp. DIN 267, part 27
< 1.1
shelf-life 4 years at room temperature

27/65 DIN 50 014


*All values apply to screws M10 ISO 4017-8.8 plain finish and nuts M10 ISO 4032-10 plain finish
**oT-standards available on request.