Rod, The best type I have come across is PB Blaster (made in Ohio), best left overnight in difficult situations and another spray in the morning. 73 Clive GM3POI
-----Original Message----- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Roger Graves Sent: 01 August 2016 22:51 To: topband@contesting.com Subject: Topband: aluminum "penetrating oil" I need to separate KLH 3 inch aluminum boom sections. When assembled 20 years ago I used Penetrox on them so hopefully they are not welded together. In fact one of them separated 1/2 inch then stuck. Would there be a "penetrating oil" that would help to free/lubricate these joints to make the separation easier? Thanks and 73, Rod, VE7VV _________________ Topband Reflector Archives - http://www.contesting.com/_topband _________________ Topband Reflector Archives - http://www.contesting.com/_topband