Loctite Threadlocker 243 is a high-performance, medium-strength thread-locking adhesive formulated to secure threaded fasteners even on lightly oiled surfaces. Its oil-tolerant chemistry ensures reliable adhesion in real-world industrial and MRO environments where residual oils or lubricants are present.
This low-viscosity, non-toxic formula resists loosening from vibration and is resistant to most solvents and chemicals, making it ideal for general-purpose fastener locking on bolts, screws, and studs across automotive, machinery, and maintenance applications.