Based on the shared experience, 3M Positionable Mounting Adhesive is the better fit if you want a permanent mount. It has a slow-bonding action, so you can reposition the print during application, but after a few hours it cures and is no longer removable. The reported advantage is that it is archival and safe for artwork/photographs, with no yellowing or bleeding on light stock.

If you specifically need the print to remain removable, 3M ReMount is the more appropriate option. It uses a low-tack, repositionable adhesive similar in concept to Post-it note adhesive and is intended for temporary/removable mounting.

So the practical distinction is:

• positionable mounting adhesive: repositionable at first, then permanent after curing
• remount: removable/temporary

For work you plan to sell, a permanent archival adhesive is usually the safer choice, provided you test first with your exact print paper and mounting surface.