MOLYKOTE® 41 Extreme High Temp. Bearing Grease

MOLYKOTE® 41 Extreme High Temperature Bearing Grease is an NLGI Grade 2 silicone-based grease with a carbon black thickener system and corrosion inhibitors, rated for continuous service from -18°C to 290°C (-4°F to 554°F). Its silicone base oil resists oxidative breakdown at sustained elevated temperatures, and the carbon black thickener does not soften, melt, or migrate under heat loads that cause conventional lithium and polyurea greases to fail. For maintenance teams managing equipment in kilns, conveyor ovens, steam turbines, and power distribution infrastructure, MOLYKOTE® 41 delivers reliable bearing lubrication without the premature relubrication cycles and unplanned downtime caused by grease degradation.

Unlike standard silicone greases, MOLYKOTE® 41 maintains structural integrity at the upper end of its service range rather than softening and migrating out of bearing cavities. Corrosion inhibitors protect bearing surfaces against moisture, acidic atmospheres, and outdoor environmental exposure, making it suitable for applications in power generation auxiliary systems, substation switchgear mechanisms, and process equipment operating in corrosive or high-humidity environments. The formulation is compatible with most plastics and elastomers, reducing compatibility risk in assemblies that combine metallic and non-metallic components.

MOLYKOTE® 41 is applicable to rolling-element and plain bearings operating at moderate speeds and loads in high-temperature service. It is not recommended for heavily loaded ferrous bearing combinations with significant sliding friction, or for painted surfaces. For applications requiring extreme pressure performance under heavy loads, evaluate MOLYKOTE® 41 against grade alternatives to confirm fit to your operating conditions.