IC-LOC Green Wicking Thread Lock. This is a wicking thread locker, and is designed to be applied after nuts or bolts have been tightened.
Threadlocker is a general term for a liquid polymer designed to brush on fastener threads just prior to installation. Threadlocker dries and locks fasteners in place, protecting the threads against water, rust, and leakage. It is especially useful in the assembly of moving parts, engines, hobby toys, and plumbing applications where, for example, a loose gasket screw can result in water damage.