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MMD > Archives > August 2007 > 2007.08.22 > 06Prev  Next


Penetrating Oil - Kroil
By Bob Loesch

> Is this US product [Kroil], in UK terms, WD40, does anyone know?

Hello Nigel.  Kroil is definitely _not_ WD40!  WD40 contains some oil,
but is mostly solvent, and its lubricating properties dissipate rather
rapidly.

I've repaired clocks, and one of the things I hate to see is a "repair"
that has been done by soaking a clockwork in WD40 -- it hardens into
a glaze or coating that is very difficult to remove.  Kroil, when its
solvent evaporates, leaves behind a very thin oil which acts as a
lubricant, but doesn't form a glaze like whatever is in WD40.

WD40, as its name (Water Displacing formula number 40) implies, has
only one good use, and that is displacing water on a mechanism that has
become wet.  After the water is gone, the item should be rinsed with
something like denatured alcohol or acetone, dried, and then lubricated
properly.

Bob Loesch


(Message sent Wed 22 Aug 2007, 15:17:43 GMT, from time zone GMT-0700.)

Key Words in Subject:  Kroil, Oil, Penetrating

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