Good point.  The 1-2620 is a bit thinner and flows well.  If you are going
to spray coat, use Dow Cornings OS series of solvents.  I would recommend
using the OS-30, which is slower evaporating than either the OS-10 (fast)
or OS-20 solvents (medium).


Doug Pauls
Principal Materials and Process Engineer
Rockwell Collins

On Wed, Oct 5, 2016 at 11:48 AM, lduso - Diamond-MT.com <
[log in to unmask]> wrote:

> We've never tried baking it but leaving it out before baking will
> definitely help. Funny story: Had a customer hand us a spec to follow for
> using 1-2577. The spec stated that "The coating facility should maintain
> 15-25% RH when using 1-2577" We politely refused.....and recommended Wyle
> E. Coyote's facility in AZ.
>
> Another option is 1-2620---basically a pre-thinned (150 cp) version of
> 1-2577 for easier spraying.
>
> Lloyd Duso
> Plant Manager
> Diamond-MT
> (814) 535-3505
> www.Diamond-mt.com
>
> On Wed, Oct 5, 2016 at 11:43 AM, Douglas Pauls <
> [log in to unmask]> wrote:
>
>> Good point.  We usually let them dry overnight at ambient conditions
>> before
>> baking.  The longer you leave a coating to evolve the solvent gently, the
>> less chance of bubbles.  We apply it pretty thick and leaving a long
>> ambient drying time allows us to do it bubble free.
>>
>>
>> Doug Pauls
>> Principal Materials and Process Engineer
>> Rockwell Collins
>>
>> On Wed, Oct 5, 2016 at 10:18 AM, Wayne Thayer - EXT <
>> [log in to unmask]
>> > wrote:
>>
>> > When baking 1-2577 be real careful: If it is cured too quickly (depends
>> on
>> > thickness) then it will trap lots of solvent bubbles.
>> >
>> > From: Douglas Pauls [mailto:[log in to unmask]]
>> > Sent: Wednesday, October 05, 2016 8:16 AM
>> > To: TechNet E-Mail Forum; Wayne Thayer - EXT
>> > Subject: Re: [TN] Silicone Conformal Coating supplier
>> >
>> > Dean,
>> > We use Dow Corning 1-2577 as our approved silicone and it has always
>> > worked well for us.  It is about 20-30% toluene, so it is a VOC, but if
>> > memory serves, there are low VOC versions of 1-2577 out there.  While it
>> > does have a relatively quick tack time, you may want to bake it a while
>> to
>> > drive the cure reaction and improve adhesion.
>> >
>> >
>> > Doug Pauls
>> > Principal Materials and Process Engineer
>> > Rockwell Collins
>> >
>> > On Wed, Oct 5, 2016 at 10:08 AM, Wayne Thayer - EXT <
>> > [log in to unmask]<mailto:[log in to unmask]>> wrote:
>> > Isn't that stuff about half toluene?
>> >
>> > Really--I love 1-2577 too, but won't it cause all of the "VOCs" alarms
>> in
>> > the county to go off at once?
>> >
>> > Wayne Thayer
>> >
>> > -----Original Message-----
>> > From: TechNet [mailto:[log in to unmask]<mailto:[log in to unmask]>] On
>> Behalf
>> > Of lduso - Diamond-MT.com
>> > Sent: Wednesday, October 05, 2016 7:54 AM
>> > To: [log in to unmask]<mailto:[log in to unmask]>
>> > Subject: Re: [TN] Silicone Conformal Coating supplier
>> >
>> > 90% of our customers (DOD & commercial) call out Dow 1-2577. A good all
>> > around SR that is extremely easy to apply, t/u, rework and has a very
>> quick
>> > "dry" time of a mere 20 minutes @ room temp. Others are MG Chemicals and
>> > Humiseal.
>> >
>> > Lloyd Duso
>> > Plant Manager
>> > Diamond-MT
>> > (814) 535-3505<tel:%28814%29%20535-3505>
>> > www.Diamond-mt.com<http://www.Diamond-mt.com>
>> >
>> > On Wed, Oct 5, 2016 at 10:48 AM, Stadem, Richard D. <
>> > [log in to unmask]<mailto:[log in to unmask]>> wrote:
>> >
>> > > I have a client who needs to qualify a silicone coating, either an
>> > > oven cure or UV cure coating. I am looking for a good supplier or
>> > distributor.
>> > > If any of you coating experts would care to share your favorites with
>> > > me, I would greatly appreciate it, as I am not an expert on sources of
>> > > coatings (best pricing, service, stocking, etc.) Feel free to contact
>> > > me directly by answering this email.
>> > > Thanks for any info you feel comfortable sharing.
>> > > dean
>> > >
>> >
>> >
>>
>
>