We use non-UV cure coating (Acrylic, Solithane, Arathane) and do encountered quite some wetting issue (but Acrylic is able to easily overcome this issue). Thus, will have perform extra process to remove, especially the release agent from components. We go for horse/animal hair bursh. Hi Richard, able to share what solvents or materials you used to remove the release agent of componnets? ________________________________________ From: TechNet [[log in to unmask]] on behalf of Richard Kraszewski [[log in to unmask]] Sent: Friday, 5 October, 2012 3:46:55 AM To: [log in to unmask] Subject: Re: [TN] UV40 Conformal Coating I have seen this same issue with a competitive UV coating to the UV40. It's partially an issue of surface energy and liquid surface tension. For proper coating wet-out the coating must have a lower surface tension than the substrate surface. These UV coatings (typical solventless and 100% solids) seem to have higher surface tension than typical solvent based coatings. Normally around 40 dyne cm. This limits their ability wet out properly as this is rather close many PCA surface energies. Release agents on some components compounds this issue also, as do vertical surfaces. Look on the bright side... If you are doing selective coating with a robot, it is much easier to maintain keep out zones with these UV coating. ;>) Rich Kraszewski -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Gumpert, Ben Sent: Wednesday, October 03, 2012 3:39 PM To: [log in to unmask] Subject: [TN] UV40 Conformal Coating Technetters, I'm evaluating Humiseal's UV40 conformal coating, but I'm seeing wetting issues - where the coating completely runs off of vertical lead surfaces. I see from some e-mails a couple of years ago that some of you are using this coating material, or were looking into it. Is anyone else seeing this problem, or have some suggestions to fix? Ben ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the Symantec Email Security.cloud service. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________