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Old 10-25-2012, 11:15 AM   #1
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Looks like tiny balls of pitch between the double pane windows........

We have just noticed that there are tiny bubbles that look like balls of pine pitch just at the edge of the black gasket, between the double paned window in the kitchen, bathroom and one of the bedroom windows...If it was on the outside, I'd think pine pitch, but in between the panes? Help please if you know what this is and what's causing it. Thank you
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Old 10-25-2012, 11:28 AM   #2
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The tiny balls that you see are most likely an agent used to remove humidity from between the layers of glass. They were installed when the windows were assembled. I'm not sure what they are exactly, but are similar to silica gel.
Silica gel - Wikipedia, the free encyclopedia
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Old 10-25-2012, 12:20 PM   #3
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Desiccant - Wikipedia, the free encyclopedia
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Old 10-25-2012, 12:58 PM   #4
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I've got similar "balls," but they look more crystalline on my trailer. They are showing up between the panes of glass on my front wing windows, the rest of the windows are single paned. These amber crystals seem to be growing right out of the rubber sealish stuff. I don't think they are a dessicant, as much as some kind of by-product of 40 year old rubber.
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Old 10-25-2012, 01:09 PM   #5
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I'm curious as to what sort of rubber by-product you suppose these crystal balls are?
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Old 10-26-2012, 07:41 AM   #6
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No they aren't a drying agent...the little white balls (silica?) are the drying agent. This substance seems to be oozing out of the rubber gasket. I thought it might be whatever glue they used to adhere the gasket. It first started on the curbside windows that were facing the sun, but is now happening in the roadside windows that are away from the sun....I may try to upload a pic.........Thanks Janet
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Old 10-26-2012, 07:44 AM   #7
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Belegedhel: Exactly, seem to be coming out of the gasket. All windows involved are side windows, none of the front windows are doing this. All are double paned as well...
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Old 10-26-2012, 08:16 AM   #8
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Could someone post a picture of these?
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Old 10-26-2012, 08:20 AM   #9
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This web page may help:
Windows, Vents & Doors - Vintage Airstream
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Old 10-26-2012, 12:27 PM   #10
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I took a couple of pics I'm going to try and upload them now...

Okay I think I got this..........
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Old 10-26-2012, 12:41 PM   #11
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A close look at the photos leads me to believe that the space between the two panes might no longer be sealed, allowing who knows what contaminants to enter the space between the panes, along with air. The stuff looking like little bits of amber might have nothing to do with the gasket/seal material.
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Old 10-26-2012, 12:56 PM   #12
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I think that is the dessicant.
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Old 10-26-2012, 02:02 PM   #13
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Quote:
Originally Posted by HairCream View Post
I think that is the dessicant.
Perhaps I could be wrong, but that's what I've always though it was too.
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Old 10-26-2012, 04:43 PM   #14
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It reminds me of what happens sometimes when you urethane a wood floor in low humidity (ie winter). The finish will flow into the cracks between the boards. This produces a thicker column of urethane between the boards.

Urethanes need air to dry, so the solvent evaporates at the surface and dries, but traps the remaining solvent in the column along with the uncured urethane. When the humidity increases and the openings between the boards begin to close due to expansion, the undried finish is forced to the surface and forms wet or tacky beads between the edges of the boards.

When I moved into my current house literally every wood floor had these crystalline beads on every board edge. They scraped off pretty easily and never reappeared.

I'm not saying your windows were urethaned!! But maybe the same sort of thing is occurring?
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