[quote=Edchris177]I thought the whole point of sealed units was to prevent any movement of moisture? In cooler climates, as soon as the temp drops at night, any moisture would fog the glass. We have units that are 20 years old with no issues. As soon as the seal comes undone, even in one little spot, the window fogs. It would also let the argon leak-out very quickly.
The sealer used to bond the panes together is not the same as the glazing tape. The stuff holding the panes is very tenacious, it is nearly impossible to separate panes without breakage, & you need a razor scraper to remove the black stuff.
The glazing tape is very mild adhesion by comparison, & is only used on the outside of the outermost pane, to provide a water/wind proof seal between that pane & the outer window frame. The interior trim holds the unit against the frame.
In reading through that fellows threads, I noticed he actually called it "glazing tape". The rolls I have were purchased about 5 years ago, they are still soft, & a bit can be stretched over a foot before breaking, & look exactly the same. I'll have to check the manufacturer, a few calls to their techie departments can often yield much information..
It certainly was an informative article, & I just rebedded the vent plugs in my Nacra hulls with marine silicone!<!-- editby --><em>Edited by Edchris177 on Jun 14, 2011 - 06:46 PM.</em><!-- end editby --> [/quote]
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