Mobil SHC Aware ST 100
Mobil SHC Aware ST 100 is a high-performance emulsifying stern tube lubricant developed for marine stern tube systems operating in environmentally sensitive areas. It meets U.S. Environmental Protection Agency (EPA) 2013 Vessel General Permit (VGP) requirements for environmentally acceptable lubricants. The formulation readily emulsifies with seawater to form a stable water-in-oil emulsion that provides adhesive lubrication and reliable protection under severe marine operating conditions.
One of the key advantages of Mobil SHC Aware ST 100 is its ability to operate effectively in the presence of water. The lubricant can safely run with emulsified water content and forms a stable lubricating film that resists water washout. This helps maintain corrosion protection and lubrication performance even when seawater ingress occurs within stern tube systems.
Mobil SHC Aware ST 100 also provides excellent load-carrying capability and rust protection. The formulation protects bearings, shafts and stern tube components from wear and corrosion, helping extend equipment life and reduce maintenance requirements. Its strong adhesion characteristics help ensure consistent lubrication under demanding operating conditions.
Another important benefit is its compatibility with most typical mineral oils used for stern tube systems. This simplifies changeovers and reduces flushing requirements. The product also offers good elastomer compatibility, allowing it to work effectively with seals commonly used with conventional mineral oil stern tube lubricants. These properties help maintain system reliability and reduce leakage risk.
Mobil SHC Aware ST 100 is recommended for marine stern tube systems, fin stabilisers and certain controllable pitch propeller systems where leaks or spills could result in environmental impact. It is also suitable for marine and mobile equipment operating in environmentally sensitive areas and for circulation systems operating under mild to moderate service conditions.
Physical characteristics include ISO VG 100 viscosity grade with a kinematic viscosity of approximately 100 mm²/s at 40°C and 19.3 mm²/s at 100°C. Mobil SHC Aware ST 100 has a viscosity index of approximately 180, a flash point of approximately 170°C and a pour point of approximately −24°C. The product also provides strong corrosion protection in seawater and reliable emulsifying performance, supporting long-term lubrication of marine stern tube systems.
