Designed to permanently lock and seal threaded fasteners that are removable by heat. LOCTITE® 263 is a red, high strength threadlocker that holds and seals bolts, nuts and studs to prevent loosening due to vibration. It is suitable for use on all metals, including inert metals such as stainless steel, aluminum and plated surfaces without the need for pretreatment. It is ideal for use on most “factory” oiled fasteners without cleaning.