Homebrew PCBs

On Sun, 17 Apr 2005 20:27:23 -0000, retired0 <retired0@...> wrote:

>
> Ok, but I was asking the brand name and part number of the
> neutral-curing sealant.
> In the US, I've searched high and low.  The only stuff I've found
> has been Dow Corning 3145rtv.  Well, there's other stuff, but it isn't
> any cheaper.  I've personally verified that you can put this stuff
> directly onto electronic components without harming them.  Last I
> checked, it was over
> $20 for a 3oz. tube.  That's horrible even if you plan to use the
> whole tube.  But it starts hardening in the tube after you open it and
> I find
> I waste 95% of the tube.
> There was some stuff at the hardware store that claimed to be
> non-corrosive, but after researching it, I convinced myself that
> it still wasn't safe for electronic stuff.  I'd be glad to hear
> otherwise.
> mike


Well, it isn't actually in permanent contact with any electronics, it must  
only be non-corrosive to printer parts when fully cured.

There are about a dozen brands of silicone here i have seen, and there are  
sure many more than that. I just chose the one that DIY store had (the  
cheapest of them).

the one i have right now is "SOUDAL" "neutral silikon" made in belgium.  
But as said there are many, many brands and i'm quite sure all perform  
similar.
The neutral silicone is the one used for stones like marble and also it is  
used for polycarbonate and other plastics where acid curing doesn't stick.

It is damn hard to find a US source on the web, maybe it is called  
differently.
see these UK pages:
<http://www.decoratingdirect.co.uk/viewprod/s/SIRSSLMN/>
<http://www.decoratingdirect.co.uk/viewprod/r/RODMG11/>

you should buy a 310ml/10oz catridge for under 10us. I can't believe it  
can't be found in every DIY store.

ST