White glue or matte medium for securing ballast?

[Charlie B]

I wet the area with Windex, then I use a 50-50 mix of Elmer's and blue winfshield washer fluid (the blue disappears as the glue dries), then I am very generous with the liquid as I let it drip from a craft paint plastic squeeze bottle . I make sure everything is soaked. Joints on my layout are all soldered , and I think everything must be holding the expansion of the rails to the verticle much the same as rail anchors work for the prototype. I only heat the building when I am working on the trains, though it has never got below 38 degrees in the building, and haven't had any problems.
As for the Atlas "tarnish" I have noticed that Atlas track is yellowish compared to the "cheaper" model power flex track, but most of us weather the rail and it would really be hard to notice the yellowing on only the rail head.

Charlie