With Loctite 266, you permanently lock and seal heavy-duty metal threaded fasteners up to 20 mm in diameter with total confidence. This high strength threadlocker is engineered for demanding applications, delivering dependable thermal resistance up to 232 °C. Its robust formulation prevents bolts and studs from loosening under continuous vibration or severe mechanical shock, making it ideal for engines and industrial machinery. Thanks to its thixotropic liquid properties, you can apply it cleanly and accurately without unwanted dripping, even on lightly oiled metal surfaces. When needed, disassembly is straightforward by heating the joint above 250 °C. This 50 ml bottle provides the reliable holding power you need under high temperatures.