AFC grease is a high-grade synthetic oil-based grease, typically used in industrial applications like linear guides, bearings, and ball screws, known for its high fretting and corrosion resistance. It's formulated with a special additive and a urea-based consistency enhancer to provide excellent lubrication and protection. 

AFC grease from THK is a high-grade grease used for linear guide rails and bearings. AFC grease uses high-grade synthetic oil as its base and is developed with urea-based grease as its consistency
enhancer, while also featuring special additives. This provides excellent fretting resistance and a wide temperature range. It is packed in 70 g cartridge with clear color and orange cap.