Do boards have to be cleaned before you apply conformal coating? *Maybe. Does it depend on what type of flux is used? *Maybe Example would be no-clean flux, you can apply conformal coating over it right? *Maybe And you can quote me on that.... Doug Pauls Rockwell Collins OK, to be a little more helpful. If your boards and components are "clean enough" as they enter your process, and if you are using a "benign enough" flux, and your coating of choice "adheres enough" to your flux of choice, then no, you don't need cleaning, i.e. a true no-clean process. Deciding the "enough" part above is the big trick and it varies from application to application, end-use environment to end-use environment, and site to site. There is no easy way to answer your broad broad question. --------------------------------------------------------------------------------- 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 To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL 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 ---------------------------------------------------------------------------------