Lee, you are correct about the Dow 1-2577 coating (I like it); however, it is a pain to remove and makes troubleshooting difficult. I have never seen a conformal coating that is not a pain to remove. The best conformal coating is applied in a vacuum chamber (no voids in coating); however, it is impossible to remove. Usually, I design a conformal coated board to have a low failure rate and low production cost and forget about the repair.
________________________________ From: EV <[email protected]> on behalf of Lee Hart via EV <[email protected]> Sent: Monday, May 8, 2017 9:44 AM To: Willie; Electric Vehicle Discussion List Subject: Re: [EVDL] spray on PC board protectant Willie via EV wrote: > I'm in the process of testing a bunch of very grungy looking miniBMS cell > modules. The good ones, I'd like to spray with something to make them more > weather resistant. Looking for suggestions. Hi Willie, Most of the sprays provide pretty weak protection. In an outdoor environment where rain, fog, and condensation are very likely, I'd suggest a conformal coating. If nothing on the board is getting hot (no heatsinks)... I use Dow Corning 1-2577. This is a thick silicone-based conformal coating that is totally resistant to water and most solvents, and works over a very large temperature range. You paint or dip the boards in it. It's clear, so you inspect parts through it. It's soft and rubbery, and can be easily removed if you need to make repairs. If you want something cheap, you can also used paraffin. Melt the wax, and paint or dip the boards in it. It too is clear, and easy to remove if necessary. The main drawback is that it melts if anything on the board gets hot. -- Obsolete (Ob-so-LETE). Adjective. 1. Something that is simple, reliable, straightforward, readily available, easy to use, and affordable. 2. Not what the salesman wants you to buy. -- Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com<http://www.sunrise-ev.com> The Sunrise EV2 Project<http://www.sunrise-ev.com/> www.sunrise-ev.com The Sunrise EV2 Project Homepage. Welcome! We are a group of dedicated electric vehicle enthusiasts whose goal is to create an affordable, high performance electric ... _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub [http://www.evdl.org/images/evdl.jpg]<http://www.evdl.org/help/index.html#usub> EVDL Subscription Information and Help<http://www.evdl.org/help/index.html#usub> www.evdl.org About the EVDL: The Electric Vehicle Discussion List, founded in 1991 by EV enthusiast Clyde Visser, is an active and vital source of information and help for people ... http://lists.evdl.org/listinfo.cgi/ev-evdl.org EV -- Electric Vehicle Discussion List - lists.evdl.org ...<http://lists.evdl.org/listinfo.cgi/ev-evdl.org> lists.evdl.org The Electric Vehicle Discussion List is a forum for discussing the current state of the art and future direction of electric vehicles (EVs). We define an EV as a ... Read EVAngel's EV News at http://evdl.org/evln/ EVDL EV News Archive - Electric Vehicle Discussion List<http://evdl.org/evln/> evdl.org EVLN - EV News Archive Edited by Bruce {EVangel} Parmenter: EVLN: home | help | archive | news | privacy policy | terms of service Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) [https://s1.yimg.com/dh/ap/default/130909/y_200_a.png]<http://groups.yahoo.com/group/NEDRA> Yahoo! Groups<http://groups.yahoo.com/group/NEDRA> groups.yahoo.com / -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.evdl.org/private.cgi/ev-evdl.org/attachments/20170508/817c548a/attachment.htm> _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Read EVAngel's EV News at http://evdl.org/evln/ Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA)
