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Rosneft Plastex CT-4 is a thread lubricant for oil country tubular goods. Its operating temperature range from - 50 ° С to 200 ° С. It meets the requirements of GOST R ISO 13678 / API 5AZ.


Rosneft Plastex CT-4 is designed for to sealing and protect against corrosion protection of rounded and thrust threads on the connections of casing, tubing, drill pipes and pipelines of any diameter exposed to repeated make-up when operating at pressures up to 70 MPa. It does not contain lead.

Approvals and specifications

NLGI Grades: 1

Approvals and specifications: GOST R ISO 13678 / API 5AZ


• Works under high pressure operation, providing sealing of threaded connections at liquid and gas pressures up to 70 MPa;
• Provides sealing during repeated screwing of pipes;
• Provides good adhesion to the thread surface;
• Provides the ability to apply both by hand, brush or spatula, and through automatic lubrication;
• Provides the possibility of high-quality (without sagging, with sufficient degree of ease) applied to threads at temperatures up to -50 °С;
• Has a friction coefficient of 1.3.


216,5 L

Typical physical and chemical properties

Name of characteristic Test method Rosneft Plastex CT
Evaporation at 100 ° C in 24 hours,% GOST 9566 No more than 2.0
Dropping point, °C GOST 6793 179
Penetration at 25 ° C with stirring, 0.1 mm, within GOST 5346 310-340
Colloidal stability,%, oil separation GOST 7142 3,6
Corrosive attack on metals GOST 9.080 pass
Oil release,%, after 24 h exposure at 66 ° С, no more GOST R ISO 13678 appendix Е 5,0
Gas evolution, cm3, for 120 h at 66 ° С, no more GOST R ISO 13678 appendix G 20
Leaching with water,%, after holding for 2 h at 66 ° С, no more GOST R ISO 13678 appendix H 5,0
Corrosion inhibition at 38 ° С, corrosion area,% no more GOST R ISO 13678 appendix L 1,0