Shell Naturelle S4 Stern Tube Fluid 100 is a high-performance biodegradable lubricant for stern tube applications in marine vessels. Its advanced synthetic technology provides exceptional lubrication and protection against wear, corrosion, and oxidation, ensuring prolonged equipment life and optimal performance. This fluid offers excellent thermal stability and resistance to water contamination, maintaining lubrication efficiency and reliability across various temperatures and conditions. Shell Naturelle S4 Stern Tube Fluid 100 suits stern tube systems, offering environmental compatibility and peace of mind to marine operators.