Thread-locking adhesive is a thin fluid applied to the threads of fasteners such as screws and bolts to prevent loosening. These adhesives cure anaerobically (away from the presence of air) and electrochemically, care must be taken to avoid contaminatin the container of threadlocker with threadlocker fluit that has contacted metal (never suck excess back into the bottle). Thread-locking fluid is a thixotropic fluid meaning under shear stress, it exhibits a time-dependent decrease in viscosity. This allows it to flow well over time, yet still resist short-duration shearing, as in vibration or shock.
MTL425B Blue Medium Strength Threadlocker 5g/.176oz
DESCRIPTION: Mercury MTL425B Brush-in-Cap Thread locker is a general purpose, medium-high strength, thixotropic anaerobic thread locker. The product cures when confined in the absence of air on close-fitting metal surfaces.
APPLICATIONS: Mercury has revolutionized the threadlocker industry by introducing the first Brush-in-Cap designed bottle for a cleaner application to small nuts and bolts. The bottle itself contains a small applicator brush attached to the cap. This design allows for very precise application of threadlocker to your project.
The MTL425B is formulated to lock all metric and imperial nuts and bolts, preventing vibration loosening and leakage through the threads. MTL425B is slightly oil tolerant, so it will bond some 'as received' parts, but best results are obtained with clean substrates. The thixotropic nature of the product prevents run off, dripping and migration after assembly. MTL425B is typically used on mounting bolts, housing screws, etc. MTL425B prevents corrosion of assembly parts.
USEFUL HINTS/NOTES: The higher viscosity material can create a thick film when bonding uneven surfaces or large gaps.
Vibration from motors and engines works fasteners loose over time, and a dab of thread locker keeps screws and nuts where you set them while still allowing removal later. This category collects thread-locking adhesives in the strengths RC builders use.
Strength Grades
Choices span the usual range: Flash Thread Locker in a low-strength purple for small screws you will remove often, and a high-strength red for fasteners meant to stay put. Mercury Threadlocker offers a medium-strength formula in a brush-in-cap bottle for controlled application.
Small-Batch Options
The Vibra-Tite two-milliliter vial suits builders who only need a little on hand. Matching the grade to the fastener matters, since a high-strength locker on a tiny screw can make later removal difficult.
A small amount applied to clean threads is enough, and the different colors here signal different strengths so you can tell them apart at the bench. For plastic parts, choose a locker rated as compatible to avoid crazing the material.
Select the thread locker grade that suits your hardware below.
 "Mercury Threadlocker 5g Medium Strength Brush-in-Cap")
