Eliminate fastener loosening because failure is not an option
Differences between Threadlocker Grades
LOCTITE® Red Threadlocker
LOCTITE® red threadlocker is the highest strength of threadlocker adhesive. This product cures fully in 24 hours and is available in both a liquid and as a semisolid anaerobic. The red high strength threadlocker products are so powerful they may require heat to be disassembled. A primerless grade red threadlocker is also available.
LOCTITE® Blue Threadlocker
LOCTITE® blue threadlocker is medium strength threadlocker adhesive. This product cures fully in 24 hours and can be disassembled with hand tools. Blue threadlockers are removable with standard hand tools on 6mm to 20mm fasteners, have fast fixture times, and are available in liquid, stick, paste and gel form. Moreover, there is also LOCTITE® QuickTape 249™ Threadlocker, the one and only of its kind globally. A primerless grade blue threadlocker is available as well.
LOCTITE® Green Threadlocker
LOCTITE® green threadlocker is recommended for locking preassembled fasteners, e.g. electrical connectors and set screws, and prevents against loosening, rust, and corrosion. This wicking grade threadlocker is categorized as a medium-to-high-strength adhesive. Also available in a liquid form, LOCTITE® green wicking threadlocker cures in 24 hours and can be removed with hand tools and, in rare instances, may require heat to assist when threads have excessive engagement lengths.
LOCTITE® Purple Threadlocker
LOCTITE® purple threadlocker, also known as LOCTITE® 222™, has become one of our most successful products. LOCTITE® 222™ cures in 24 hours. This low strength threadlocker can be used on metals such as aluminum and brass and offers a lot of flexibility to the user.
LOCTITE® purple threadlocker has many uses, from carburetor screws to eyeglasses to small screws on laptops. Due to the threadlocker being low strength, it can be removed with the same tool used to put the project together. It is available in an easy-to-use liquid application, which makes the product especially efficient with very small screw applications, less than ¼ inches in diameter.
Find a TDS/RoHS/SDS
Discover the full range of threadlockers and download product specific technical data sheets (TDS), restriction of hazardous substances sheets (RoHS), and safety data sheets (SDS).
Learn with LOCTITE®XPLORE
Learn how to effectively increase your threaded assemblies’ strength and reliability with threadlockers. Download our threadlocker MSDS and user guide below, or discover more about the LOCTITE® range of products with the threadlocker flyer and manual.
Benefits of Using LOCTITE® Threadlockers
- Locks mating threads to prevent loosening from vibration & shock
- Seals against fluids & corrosion
- Provides lubricity to achieve controlled strength during assembly
- Prevents galling and seizing for reliable disassembly
Blue or Green? How to Choose a LOCTITE® Threadlocker
There are 3 things to consider when choosing a threadlocker and color is key, as it represents strength:
- Low Strength (Purple)
- Medium Strength (Blue) – most applications can be served with blue threadlocker
- High strength (Green)
2. Fastener Size
- From < ¼” (6 mm) fasteners on up, there’s a LOCTITE threadlocker
3. Application Methods
- Pre-Assembly: Most LOCTITE® liquid threadlockers are designed to be applied at the moment parts are assembled
- Post-Assembly: Wicking grade formula can be applied on parts that are already assembled