---snip--- Hi Silicon grease has a negative coefficient over much of the normal temperature range. I actually gets thicker with heat not the other way around. Don't confuse with heat sink compound. I actually put silicon grease into sockets to improve contact. It is used by manufactures in many places that require improved contact. Heat sink compound is nasty stuff. It is not what I'm talking about. I have sockets that have 10-20 years of trouble free function with silicon grease in them. From experiments that I did years ago when working for Intel, silicon grease not only works well on sockets and edge connectors, it help switches as well. Especially those that have particularly high or low current. In the high current ones it helps to prevent arcing. The improved contact reduces contact heating. In the low current ones it reduces the need for contact scrubbing. About the only bad thing I can think of is that one might get it on the surface of a floppy disk. Any grease on the surface usually makes writing the disk problematic. I've never seen DC#4 cause a bad contact. I've seen many cases where it has improved it enough that problems of contact over heating are no longer an issue ( Molex connectors in pinball machines ). WD40 contains all kinds of junk. I've never had troubles soldering when the joint had silicon grease ( DC#4 ) on it. In fact, most cases, it almost works as well a flux by keeping the oxidation down ( Also done while at Intel ). The only reason Intel didn't use it after the experiments I did was because they feared that pre-labled parts would get this on them and the lables would not stay on ( a valid reason ). Dwight