Permanent Strength Red Threadlocker, 50 mL, 1 in Thread, Red no checkout Reflects harmful infrared rays while Reflects harmful infrared rays while staying cooler than a conventional green filter plate Precisely shaded and optically correct Light weight and impact resistant Durable construction with brass plated joints and brass end caps which prevent the ends from splitting Marked on both sides for versatile use Embossed numbers and graduations prevent print corrosion nylon inserts and other mechanical devices as Permatex Threadlockers secure the entire fastener assembly against loosening from shock or vibration and they maintain fastener clamp forces They also seal the threads against leakage and prevent rust and corrosion Superior to conventional lock washers