Screw Loosening Adhesive - low strength. It can be removed easily. Suitable for all metal threaded connections. LOCTITE 222 is a low-strength threadlocker that allows adjustment, including countersunk head and set screws. It is useful on low strength metals such as aluminum or brass that can break while being removed. It is effective on all metals, including passive surfaces such as stainless steel, aluminum and coated surfaces. It has proven to withstand the small amount of surface contamination from industrial oils such as engine oils, anti-corrosion oils and cutting fluids.