OKS 521 – MoS₂ Bonded Coating, air-hardening, Spray

Air-hardening bonded coating on MoS₂ basis for dry lubrication of machine elements subject to high demands.

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Areas of application

  • Lifetime lubrication of metal-to-metal connections at low to medium rotational speeds and high loads
  • Run-in lubrication in combination with oil or grease lubrication
  • Dry lubrication at sliding pairs, in particular under heavy loads and low sliding speeds, at oscillating movements
  • Dry lubrication at high operating temperatures (up to 450°C)
  • Dry lubrication in dusty environment, to avoid adhesions

Advantages and benefits

  • Highly effective due to good adhesion to prepared substrates
  • Allows a low coefficient of sliding friction also under heavy loading
  • Very thin layer thicknesses possible
  • Increased wear protection
  • Rapid curing at room temperature
  • Shortens and improves run-in conditions of friction bearings, toothing and other sliding pairs

Technical specifications

  • lower operating temperature: -180 °C
  • upper operating temperature: 450 °C
  • density (at 20°C): 0.79 g/cm³


For best adhesion, clean the surfaces mechanically first and then with OKS 2610/OKS 2611 universal cleaner. The surfaces to be treated must be bright metal and dry. Chemical or mechanical pretreatment of surfaces may extend the service life of the non-stick paint. Spray OKS 521 on evenly. Avoid excesses. Drying and curing conditions as per the following technical data.

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