Michael, My suggestion will be that you use water soluble tape to protect your PTH pattern at the bottom side. The tape dissolves during water wash cycle of cleaning. Give me a call at the number listed below for more details about the process and how tape can be used. I used it successfully at IBM few years back ( now I am retired and building a web site with PCB process information). Will be happy to help. "McMonagle, Michael R." wrote: > I have an application where I need to mask off a through-hole SIP > through wave solder. Washable liquid mask is getting on closely adjacent > bottom-side SMT components, and I can't justify an automated dispenser with > current volumes. I remember a company back in the days of when through-hole > was king (waaaay back there) that made high-temp filled plastic masking > thingamajigs that fit standard DIP/SIP patterns. You just dropped them in > the hole pattern before wave, then removed and reused them after wave. > Anybody out there know what I'm talking about, and who makes them? > > Mike McMonagle > PCA Process Engineering Supervisor > K*Tec Electronics > 1111 Gillingham Lane > Sugar Land, TX 77478 > (281) 243-5639 Phone > (281) 243-5539 Fax > [log in to unmask] > > ############################################################## > 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 Gayatri Sardeshpande at [log in to unmask] or > 847-509-9700 ext.5365 > ############################################################## -- ____________________________________ Regards, Pratap Singh Tel./Fax: 512-255-6820, e-mail: [log in to unmask] or [log in to unmask] ############################################################## 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 Gayatri Sardeshpande at [log in to unmask] or 847-509-9700 ext.5365 ##############################################################