Never use green locktite on anything unless you want it to be PERMANENT!Use 242 (pink / purple) sparingly if you must use threadlocker.
Have you taken into account that most scope mounts are aluminum?
GREEN color don't mien SQUAT !! without knowing the GRADE / SPEC # it is being sold as.640 & 680 are Stud & Bearing lockers and TOUGH !!!290 is penetrating / wicking and is of a med to lighter hold when not over applied and works great on small screws and on the receiver to dovetail contact with mount dovetails. THERE ALL GREEN