6 Pack 3M PHOTO MOUNT 4 OZ 3M Photo Mount™ Spray Adhesive A strong, clear, professional-grade adhesive developed especially for mounting black and white and color photos quickly, easily, permanently. Also excellent for mounting art prints, maps, illustrations, etc. Photo safe, pH neutral, non-yellowing, and nonstaining. Recommended mounting surfaces include good quality cardstock board, Plexiglas™, plastic, glass, clean metal, and smooth surface foam core. Not suitable for outdoor applications.