Permatex Permanent Strength Red Threadlocker, 10 Ml, 3/8 In - 1 Indesigned For Securing Parts That Must Withstand Heavy Shock, Vibration, Or Extreme Chemical Or Environmental Conditionsheat Required For Removalpermanent, High-Strength Threadlocker Directly Applied To Fasteners Ranging From 3/8" To 1"Prevents Loosening Resulting From Vibration.