JET-LUBE SEAL-GUARD ECF The advanced base grease is a carefully selected balance of synthetic and vegetable oils with our Extreme base grease thickener technology coupled with innovative solid lubricants. The result is superior lubrication under high loads with galling resistance equivalent to heavy metal-based compounds in a totally metal-free formulation. The cutting edge technology provides a high affinity to metal surfaces with relatively low added-solids content.