The VC3 is what I have been using as well.I like Vibra Tite VC3 which was not tested. It is applied to thread and allowed to dry 10-30 minutes then assembled. It stays flexible and it can be disassembled and reassembled without need to reapply depending on use. Both types are for sale on Amazon in small tubes so you can try them yourself at less than $6 each. Some slow minded folks complain the bottles of Vibra Tite are only half full. But there is a reason for that. The anaerobic formula needs air space in bottle so it will not harden.
Based on these results I am going to give the test winner Vibra-Tite a try for my scope rings.