Neatsfoot oil

Fat from warm-blooded animals normally has a high melting point, becoming hard when cool, but neatsfoot oil remains liquid at room temperature.

Modern neatsfoot oil is still made from cattle-based products, and is sometimes[vague] criticized for a tendency to oxidize and therefore contribute to the deterioration of leather.

[4] The addition of mineral oils may lead to more rapid decay of non-synthetic stitching or speed breakdown of the leather itself.

[citation needed] Like other leather dressings, neatsfoot oil can oxidize with time and contribute to embrittling, especially on historical objects.

For machining, tapping and drilling aluminium, it is superior to kerosene and various water-based cutting fluids.