LOCTITE® 638 is a shaft—bushing compound designed for gluing cylindrical joints, especially with small gaps (about 0.25 mm). The product polymerizes between tightly fitting metal surfaces in the absence of air, after which it effectively prevents the loosening of joints and the occurrence of leaks due to shock and vibration. It is suitable for use not only with active metals, but also with passive bases, and demonstrates excellent curing characteristics. The product is highly resistant to high temperatures and oils, and also allows minor contamination of the surface.

  • It is allowed to have minor contamination on the surface, for example in the form of technical oils
  • High strength on any metal surfaces, including passive ones (e.g. stainless steel)Resistance to high temperatures
  • Ideal for fixing bushings and sleeves into housings and shafts, as well as similar cylindrical parts
  • DVGW Certificate (EN 751-1): NG-5146AR0619
  • P1NSF, reg. no.: 123010
  • WRAS Certificate (BS 6920): 0511518


Packing volume 10ml, 50ml, 250ml
Viscosity (mPa*s) 2000 — 3000
Thixotropy Нет
Maximum radial clearance 0,25 mm
Fixing time (on steel) 4 min
Tensile strength (N/mm^2) >25
Operating temperature range -55°C...+150°C
Fluorescence Да
Color green
Chemical basis: Methacrylate

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