Keep in mind that threadlocking compound doesn't keep screws tight. It just prevents relaxation due to acoustic noise, which a snowboard (especially at high speed or over textures like granular snowpack) experiences lots of. The actual tightness of threaded members is caused by the longitudinal stresses developed by straining the bolted members when tightening past the point where physical interference occurs. This increases the normal forces on the planes of the threads which is what develops the friction that causes resistance to torque. In other words, if you don't put some muscle behind it, threadlocker won't do anything by itself. Get yourself a quality number 3 phillips head screwdriver with a good handle.