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OKS 240 – Antiseize Paste (Copper Paste)

High-temperature screw paste on copper basis for preventing corrosion, seizing and binding.

Areas of application

  • Assembling screw threaded connections subjected to high temperatures and corrosive influences
  • Screwed connections at pipe fittings, flange joints and fittings in superheated steam lines
  • Combustion chamber screwed connections and mounting bolts of gas and oil burners
  • Screwed connections at combustion engines, exhaust systems, silencers and exhaust gas pipe connections

Advantages and benefits

  • Allows reliable non-destructive dismantling even after longer operating period under high operating and ambient temperatures
  • Provides an optimal ratio of screw pretension and tightening torque
  • Electrically conductive
  • Also available as spray version OKS 241

Technical specifications

  • Operating temperature: -30 °C → +200 °C/+1,100 °C
  • Press-fit: µ = 0.12, no chatter
  • Four-ball test rig (welding load): 2,800 N
  • Thread friction (M10/8,8): µ total = 0.09


To achieve optimal adhesion clean the thread or the sliding surface first mechanically and then with OKS 2610/OKS 2611 universal cleaner to remove soiling as well as any lubricant residues. Use a brush, spatula or similar to apply a sufficient amount of paste to the head or nut contact surface and to the thread. Spray on evenly OKS 241 spray. The paste will also act as a sealant. Caution: Do not use paste instead of grease and mix only with suitable lubricants.

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