Medium strength, 1700 psi. Blue color is best for scope mounting and most gunsmithing applications. Fills fine threads without binding. Locks threaded fasteners against vibration loosening. Prevents leaks and rusting of threads. Bond can be broken loose without heat. Parts disassemble with hand tools. Ideal for fasteners 1/4" to 3/4". Degrease parts thoroughly before using. 6ml tube.