Correct, there are brands of silicone rubber that are made for electronics, and your local hardware store won't have any of them. -- Lawrence Lile Jack Smith Sent by: pic microcontroller discussion list 12/26/2003 10:19 AM Please respond to pic microcontroller discussion list To: PICLIST@MITVMA.MIT.EDU cc: Subject: Re: [EE ] Watertight Enclosure >DO NOT use silicone rubber anywhere around copper - it produces acetic >acid fumes which corrodes copper even if they are not touching. Lots of >people make this mistake. Isn't this true only of the stuff you buy at the local hardware store? It is possible to purchase non-corrosive varieties of RTV intended for electronic purposes. Dow-Corning 748, for example, is a non-corrosive RTV type sealant. GE makes similar products. Sometimes these are sold as "aviation" or "aerospace" sealants, in addition to an "electronic sealant" name. Jack -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body