For an opaque coating, look at Electrolube DCB. I have used it before for
customers with the same security concerns.

On Fri, Aug 30, 2019, 14:13 Graham Collins <[log in to unmask]> wrote:

> Hello Technet
>
> So I've got a customer who wants to dip coat their circuit board.  It is
> a small thing, 1/2" x 2", with wires attached at one end.  So for dip
> coating I can actually hang it by the wires for curing, no masking
> required - works out OK.
>
> A couple of questions though.
>
> 1) any gotcha's with dip coating?  I've only done spray (manual and
> automated) thus far.  Is viscosity critical?
>
> 2) does anyone make a black colored coating? They are somewhat concerned
> with IP protection so a color block would be a plus.
>
> Happy labor day weekend to all on this side of the pond!
>
> thanks,
>
> --
> Graham Collins
> Senior Process Engineer
> Sunsel Systems
> (902) 444-7867
>