Mike Here are a few issues that you should investigate in regard to material compatibility before proceeding. 1. Will the residue remaining from the no clean flux absorb the solvent from the candidate conformal coat material? 2. Will the resulting mixture of coating and no clean residue change the electrical characteristics of the circuit (i.e. dielectric constant, impedance) 3. Will the resulting mixture be prone to moisture absorption in your application? If you need further guidance on how to investigate these concerns, please contact me offline. Regards, Pat Kane Technical Sales Manager Contamination Studies Laboratories 765-457-8095 office 765-419-2080 cell ############################################################## TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c ############################################################## To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body: To subscribe: SUBSCRIBE TECHNET <your full name> To unsubscribe: SIGNOFF TECHNET ############################################################## Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information. If you need assistance - contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ##############################################################