"soup" wrote in message
...
Looking for a penetrant to get some seized parts separated.

Does anyone have a favourite (Plusgas, WD40, WHY).
I would prefer aerosol but am not immune to being told it's much
cheaper and really no more difficult to use a liquid.

Interesting question.
I know WD is water displacer recipe 40. According to the 5l container I
have, it is advertised as 'Penetrates, LUBRICATES and leaves protective
film'.
I also use Duck Oil which is far from bad.
By far the best penetrant I have used is some stuff called Freeway from
Applied Chemicals of Coventry. Definitely not a lubricant. We used to buy it
in 25l containers. Down to my last couple of litres now and don't know if
Applied still exist. Not cheap but very good.
Plusgas also good but I haven't used it for years.

Good luck,
Nick.