Red Loctite (272) is used for bearing and stud mounting, Extreemly strong stuff. Blue Loctite (242) is for service removable with standard size screws 1/4-20 and above. There is a Purple loctite that is made for small screws, but the nunber escapes me. If you get a good grip with the blue you might strip the heads out on smaller screws. When using the red, touch the screw head with a pencil type soldering iron for a few minutes. Heat will cause the loctite to disintergrate, allowing you to remove the screws