Mr. Gasket Blue (medium strength) thread locking compound is an anaerobic locking material that cures between the threads on nuts & bolts to prevent them from vibrating loose. Easy removal with hand tools - Ideal for use on fasteners that are frequently removed. 1/4 ounce tube. Made in the USA Features: Blue-Medium Strength Prevents Nuts & Bolts from Vibrating Loose Use w/ 1/4” to 3/4” Fasteners Easy Removal w/ Heat & Hand Tools – Ideal for Use on Fasteners That Are Not Frequently Removed Shear Strength 1,200 PSI Temperature Range: -65° to 300° F Made in the USA