This Beaver has 20 panes of SE-GI double pane windows. 3 were not afflicted with the creep. 2 were not serious. The remaining 15 are now fixed! I have enough of the replacement spacer to do the 2 that may get worse, but I likely don't have enough for the other 3. I also ran out of the black sh*t and had to get another tube sent from Bend, as I couldn't find any supplier locally, or on line. I didn't resort to going to a glass shop and begging them to get me one, but that is another possibility, if I get around to doing the other 2 windows.
Boy, does that change the look of this Beaver! Mostly from the inside, but also, for anyone coming to the door, they would have seen the worst of the creep, as the worst windows were the door, the tall one beside the door, and the two lower windows by the driver, followed closely by the small one over the sink and the big one behind the passenger seat. Getting all those in the main cabin done has taken several years off the apparent age of this Beaver.
Not a terribly difficult task, as long as you are prepared to put in the time. It was taking me about an hour for each pane, to do the seals, plus another hour getting each window out of the coach, the two panes out of the frame, and all back in again. Add still more time to getting the valances and shades off and back on again. All in, for the 15 panes that I fixed, at least 30 hours, maybe as much as 40 hours. I wouldn't want to do it in high humidity, or in a dusty place. I would need a shop to work in, if I were in a more restrictive park, or a less private site. Here the humidity has been less than 50% at all times, and as low as 17%. The spacer has dessicant in it, so will absorb any slight amount of moisture from the ambient air between the panes of glass, but I wouldn't want to stress it by, eg, working at home in BC, where humidity as low as 50% is a rarity.