Permatex Medium Strength Threadlocker Blue 2.5ml 24206Permatax's blue threadlocker is designed for providing extra strength to your nuts and bolts. Not only will this product help prevent parts loosening over time from vibrations, it also helps provide extra corrosion protections.Medium Strength Threadlock Key Features All-purpose medoium strength; Locks and seals parts to prevent loosening; Protects threads from corrosion; Ideal for nuts and bolts 1/4" - 3/4"; Keeping your parts safe from corrosion or loosening from vibrations is an important part of trailer safety.