OKS 241 – Copper Paste, Spray

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

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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

Technical specifications

  • lower operating temperature: -30 °C
  • upper operating temperature: 1100 °C (separation)
  • press-fit test (μ): 0,12, no chatter
  • four-ball test rig welding load: 2,800 N
  • thread friction coefficient (μ total): 0.09 (screw ISO 4017 M10x55-8.8 black-oxide, nut ISO 4032 M10-10 black-oxide)


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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