Re: [ATM] RE: RTV Silicone question

["Jim Miller" <jim@jtmiller.com>]

Kevin

PVC is slippery stuff. I'd drill a hole in it wherever a RTV pad was 
intended and make sure the RTV squirts through the hole for a mechanical 
hold as well as adhering to the surface of the PVC.

jtm (whose 30+lb 18" mirror was shipped cross country upside down...in a box 
carefully marked with red arrows on all sides "THIS SIDE UP!)

----- Original Message ----- 
From: "Kevin Whitefire" <chaosopher23@yahoo.com>
To: "Guy Brandenburg" <gfbrandenburg@yahoo.com>; "lou krajci" 
<loukrajci@comcast.net>; <atm@atmlist.net>
Sent: Thursday, September 30, 2004 9:44 PM
Subject: Re: [ATM] RE: RTV Silicone question


Thanks to everyone - I don't plan on storing it upside
down, and my secondary is the one I plan on sticking
to a piece of PVC.  The primary will be held in with
silicone as its backup plan.

As for the Silicone II stuff, that's mostly acrylic
latex that has little or no adhesive qualities that's
supposed to smell better than Silicone RTV whiile
retaining waterproofing qualities.

I will use alcohol and a scouring pad to clean my PVC
holder, and a sanding block to make sure the mirror is
flat with the plastic.

Kevin of Eastern Iowa
Seeker of the Darkness


--- Guy Brandenburg <gfbrandenburg@yahoo.com> wrote:

> I had a mirror come off, too, from sheer stupidity.
> I
> stored the telescope in a VERTICAL orientation,
> because I thought that if I had the mirror at the
> bottom facing up then it would get covered with
> dust.
> So why not have the mirror at the TOP facing DOWN,
> where it would stay clean?



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