LOCTITE Adhesive Threadlocker Blue 50mL Num.242 is a medium-strength threadlocker specifically designed for general purpose applications. The threadlocker can be removed with a hand tool, making it suitable for parts that require disassembly and adjustment. Identified by blue color on packaging, this threadlocker requires the use of primer on fasteners made of inactive metals such as stainless steel, aluminum, and plated or coated metals.