Permatex blue gel threadlocker in the Gel Twist pin point applicator. An all-purpose medium strength blue treadlocker gel that reliably secures all nut and bolt applications 1/4" to 1" (6mm to 25mm). Locks and seals threaded assemblies while preventing parts from loosening due to vibration or thermal differential expansion. Removable with hand tools for easy disassembly. Ideal for valve cover bolts, water pump bolts, oil pan bolts, drive shaft bolts, rocker arm adjustments nuts, and carburetor studs. Puts you in control of your threaded assemblies. Secures threaded assemblies with the same quality as other chemical solutions, without the problems. No more liquid drips or solid stick globs to deal with.