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From: "Marvin Dickens (mpdickens AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Date: Thu, 16 Feb 2017 11:01:26 -0500
Message-ID: <CANEvwqh1q19j1QYhZkxTmTRdeL_GOH8TCYhE+xt_9Tq8N7mcMw@mail.gmail.com>
Subject: Re: [geda-user] [Offtopic] Application of silicone based conformal coatings?
To: geda-user <geda-user AT delorie DOT com>
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Precedence: bulk

A cheap airbrush with adjustable nozzle works in a tight - They key is
dry air and stable air flow.
This is how we do it with our prototypes...


Regards

Marvin

On Thu, Feb 16, 2017 at 4:38 AM, Peter Clifton
(petercjclifton AT googlemail DOT com) [via geda-user AT delorie DOT com]
<geda-user AT delorie DOT com> wrote:
>  Hi all,
>
> I bought some Dow Corning silicone based conformal coating from a supplier I
> use for solder paste syringe tips etc...  this was repackaged into 50ml
> syringes by them.
>
> Turns out I've no idea how to apply it. I have an air dispensing setup
> (Fisnar), but the material is more viscous than I anticipated and does not
> flow as much as I'd hoped when simply dispensed by syringe onto the board.
>
> Brushing leaves ugly brush strokes.
>
> I think I may need some kind of spray setup. Does any one know how this is
> done "properly", or have any experience DIYing such a setup?
>
> The place I bought the coating also sell spay dispensing valves (moderately
> expensive), controllers for them and xyz dispensing gantry robots (spendy
> items).
>
> Possibly looking to rig something simple up to approximate £expensive setup.
>
> Any thoughts?
>
> Kind regards,
>
> Peter Clifton