3M Scotch-Weld TL71 Red Threadlocker, High Strength

3M Scotch-Weld TL71 red threadlocker is a high-strength grade for studs, bolts, and fasteners that should stay locked through heavy vibration and shock, and it typically needs heat to remove. It comes in 10 mL, 50 mL, and 250 mL bottles for maintenance and production use. See Blue Threadlocker for medium-strength grades that come apart with hand tools.