Servo Rubber EF-4 is mainly produced for tyre industry. It is Residual Aromatic Extract (RAE) type of Rubber Process Oil. It is an environmental friendly rubber process oil.It meets EU Directive requirement of sum of 8 specified PAHs – 10 ppm maximum. It contains enough amount of aromatics for higher solubility of rubber components.It is used in natural and synthetic rubber for mixing along with other ingredients to improve the work ability of the finished rubber in the desired application. The harmful PAH content (sum of specified 8 items as per EU Directive) in Servo Rubber EF – 4 is less than 10 ppm and Benzo(a)pyrene (CAS No. 50-32-8) less than 1 ppm.
| Appearance @ 30 °C | Dark brown liquid |
| Density @ 15°C, gm/cm3 | 0.973 (Typical) |
| Kinematic Viscosity cSt @ 100°C | 50 – 80 (59.88 -Typical) |
| Aniline Point,°C | 55 – 75 (69 – Typical) |
| Pour point °C Max. | (+) 27 (Typical) |
| Refractive Index @ 20 °C | 1.53 – 1.56 (1.5478 – Typical) |
| Harmful PAH content (8 specified PAHs as per EU) | 10 ppm max (< 4 ppm – Typical) |
| Total Sulfur content % mass | 5 max (2.8 Typical) |