Re: [ATM] RE: RTV Silicone sucks

[Kevin Whitefire <chaosopher23@yahoo.com>]

I think the bond formed with silicone between glass
and another surface is a perfect vacuum.

Silicone is a liquid until cured.  While it is liquid,
it displaces air.  The air stays out when the stuff is
solidified, thus it's an excellent vacuum, and because
of this property that it sucks as an adhesive - a bond
is formed.

I would think that smooth surfaces would form a better
bond, because the silicone will hold fewer air bubbles
in its suction zone.

So the stuff sucks.  Metal clips on the outside of a
mirror are even worse.  They block light.

Kevin

--- Mark Holm <mdholm@telerama.com> wrote:

> >
> >
> >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.
> >
> 
> PVC is not a good surface to try to get silicone to
> stick to.  For best 
> results, scuff up the PVC with coarse sandpaper,
> drill the holes as 
> suggested and clean it well with alcohol.  I'm not
> sure even that will 
> provide a really strong adhesion.
> 
> Mark Holm
> 
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