Loctite 243 threadlocker is a blue, medium-strength adhesive designed to lock and seal threaded fasteners while allowing future disassembly with standard hand tools. It’s the professional choice for applications where reliability and serviceability are both required.
Engineered by LOCTITE, this threadlocker prevents loosening due to vibration, seals against leakage, and offers reliable holding power across a wide range of industrial and automotive uses.
When you need a balance between holding power and removability, Loctite 243 threadlocker is the go-to adhesive. It’s formulated to work on all metal fasteners, including passive substrates such as stainless steel, aluminum, and zinc without requiring a primer.
Top Benefits:
Removable with tools: Ideal for bolts, screws, and nuts that may need service.
Oil-resistant: Bonds effectively on slightly oily or contaminated surfaces.
Medium strength: Strong enough to hold, easy enough to remove.
Temperature resistance: Withstands -65°F to 360°F (-55°C to 180°C).
Corrosion protection: Prevents seizing and galling in threaded assemblies.
This versatile adhesive is used by maintenance professionals, engineers, and mechanics around the world. It’s ideal for:
Automotive repairs (e.g., water pumps, valve covers, mounting brackets)
Machinery assembly and maintenance
Pneumatic/hydraulic systems
Power tools and appliances
General manufacturing environments
Whether you’re working in a garage or on an industrial production line, Loctite 243 threadlocker offers proven results.
Clean threads if heavily soiled (light oil is acceptable).
Apply Loctite 243 threadlocker directly to the threaded part.
Assemble and tighten as needed.
Curing time: fixtures in 10–20 minutes, fully cured in 24 hours.
Disassembly is easy with standard hand tools—making future repairs or replacements simple and efficient.
This 50ml bottle is ideal for repeated applications in a workshop, factory, or maintenance operation. It provides excellent value while offering precise, controlled use of product with each application.
Bulk capacity for frequent users
Consistent dispensing
Fits easily in toolboxes and workstations
LOCTITE has been setting industry standards for decades, trusted globally by manufacturers, mechanics, and engineers alike. Loctite 243 threadlocker continues that tradition with superior performance, reliability, and convenience.
This product meets the demands of a wide range of industries—automotive, aerospace, machinery, and more—where fastening integrity and serviceability are essential.