JPD-5525735 ZAPPT42 Z-42 Thread Locker Blue – 6g/0.2oz Finest thread locker you can buy! Prevents loosening due to high vibration, yet parts disassemble with simple hand tools. High-strength, premium grade red liquid locks and seals metal nuts, bolts, and studs or metal fasteners up to 1" (26mm) in diameter. Holds in temperature ranges from -65°F – 300°F (-54°C – 149°C). Blue- Medium strength Red- Permanent strength