Has anyone had any success using a no-clean flux on thick (0.090") multi-layered thru-hole PCB assemblies? We want to switch to a no-clean flux from our present aqueous system. Our Electovert currently has a foam fluxer but would get a jet-sprayer if the flux was right. However, we tried a few demo no-clean fluxes and experienced problems with our larger and thicker multilayer boards as far as solder wicking up to the top-side on feed-thru's. We even added extra heated air-knives and to no avail. If you have had success with any particular no-clean fluxes, please let me know what they are. Thank you. Fred ############################################################## 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. For the technical support contact Dmitriy Sklyar at [log in to unmask] or 847-509-9700 ext.311 ##############################################################