As long as we're on the subject or MM, I should mention that it is heat reversible.
Heat up a drymount press to about 160-170F, press the glued-down pacakge a few minutes with a thin cover sheet. As soon as you remove it there is about a 30 second time span where the print will peel of quite easily. Before attempting this, you should practice with a reject package or one you made up for testing.
And in the unlikely event just a section or edge should ever peel up, you can re-attach it with a household iron or tacking iron.
Correct amount of glue for most purposes is about 0.003 ounces of glue per square inch of total glued area (not just the print size). The 1/8" thick, 8" wide foam rollers I use will soak up about 2.5 ounces of glue. So if I'm gluing 200 square inches of media, I would need 0.6 ounces for the media, plus 2.5 ounces for the roller, for a total of 3.1 ounces. Of course, the extra 2.5 ounces is only if the roller is dry to start with, which is usually just the first print in a mounting session.
PS always have a scrap piece of cardboard handy so you can "roll off" some of the glue in the roller if you get too much glue on the substrate. Pressing hard moves glue from the roller to the cardboard. Pressing soft goes the other way, but only slightly.
PS you can store a wet roller in a large refrigerator baggy a long time without the glue drying, at least 10 hours. Just make a half-hearted attempt to prevent too much air getting into the bag, just a couple sloppy folds will do if you can't seal the bag.