Thanks for your response. We use Dow Corning 1765 room temperature vulcanizing conformal coat. This coating is a temp/humidity cure with a tack free time of less than 10 minutes at room temperature. Cure times can be accelerated by elevated temperatures, but not exceeding 60C. Ian Slater, P.Eng. Manufacturing Engineer GE Harris Energy Control Systems --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------