Agreed with all Lee said, it is my experience also. Dow Corning silicones
are among the best.

Just a note to add is they last for a limited time if not cured, so make
sure you buy it when you need it. In my experience 6 months may be already
too much wait as the silicone will start degrading fast.
Cheers,

--=20
Ariel Rocholl
http://www.rf-explorer.com



On Wed, Feb 15, 2012 at 1:48 AM, Lee Mulvogue <lee@baudalign.com> wrote:

>
> Get some proper moulding Addition-Cured RTV silicone, like Dow Corning
> Silastic S-2 or similar.  They are initially expensive, I think I paid
> about $80 for 1.1kg, but they would make a mould that is reusable
> hundreds, if not thousands, of times, and readily flexible so your
> parts just pop right out in 2 seconds flat.  Available in different
> shore hardnesses, choose one that's flexy enough to pop your part out,
> and has a high tear strength.  You don't even need a release agent,
> but a quick spray of a proper release agent can greatly extend the
> life.
>
>        Do a youtube search and you'll find vids on how to make moulds, an=
d
> see them in action.  Well worth the initial cost if you are doing
> thousands, only need to machine up the one initial set to base the
> mould off, no more time required machining for each mould run.  And
> 1.1kg should make you a whole heap of moulds of your required size.
>
>        some info:
> http://www.erapol.com.au/english/Products/Silicone/Addition-Cured.html
> [1]
>  Lee
>
> -------------------------
> Msg sent via Webmail - http://hosting.myob.com/
>
> Links:
> ------
> [1]
> http://www.erapol.com.au/english/Products/Silicone/Addition-Cured.html
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