What are threadlockers? Lockfast threadlockers are anaerobic adhesives used to lock threaded fasteners.
Absolutely nothing! Exercise is commonly associated with the term aerobic (with oxygen). Anaerobic means without oxygen, the opposite of aerobic. Anaerobic adhesives cure via a free-radical process, and they will not cure in the presence of air. The reaction begins with metal ions being present, followed by air being locked out. As a result, anaerobic adhesives such as threadlockers are well suited for locking threaded fasteners such as nuts and bolts.
Since anaerobic adhesives are 100% reactive, their initial fixing time can vary depending on the substrate. As a result of the presence of more metal ions, more reactive substrates, such as copper, brass, bronze, iron, and mild steel, can be fixed in a shorter period, compared to “passive” substrates such as stainless steel, aluminium, galvanized, zinc phosphate, silver, oxide films, chromate finishes, anodic coatings, plastics, and ceramics. They may take longer to fix, but they are still fast. Ultimate strength is usually reached after 24 hours.
(The graph depicted above is not scientific and is for illustrative purposes only.)
To inhibit the reactive curing process, threadlockers are stored and packaged with air. Because half of the bottle contains air, and the other half contains adhesive, it may look like the bottle is underfilled, but Lockfast® Threadlockers are packaged in larger bottles to allow for this, so a 10ml threadlocker is packaged in a 20ml bottle. Air can also penetrate the bottle because it is made from LDPE (low-density polyethylene), which can help preserve the products shelf life.
As Lockfast® Threadlockers replace the need to hold a variety of types and sizes of traditional fasteners, such as lock washers, split pins, and nylon lock nuts, holding a few grades can be less expensive. There is only a need for a few drops per application (depending on thread size).
Lockfast® Threadlockers cure in the joint, so they are clean and easy to use. By filling the gap between the mating threads, they prevent corrosion, leaking and loosening caused by vibration, shock and thermal expansion. UV light can also be used to identify most products.
Two indicators of strength are breakaway and prevail, both measured in Newton-metres (Nm). The breakaway strength is the force that is needed to break the bond, and the prevailing torque is the force needed to unscrew the threaded part. Higher strength threadlockers (STUDLOCK) will typically have a higher prevailing torque than breakaway strength.
There are three main categories in the Lockfast range.
A low strength threadlocker that can be disassembled with hand tools.
These are also more suited to weaker metals to prevent substrate failure.
Are medium strength threadlockers.
Are high strength threadlockers.
Some grades have other features that have associated icons for easy identification, see our article “Lockfast Icon Explained” here.
These are also colour coded, green, or red typically represents a higher strength product, blue medium or medium to high, and purple low.
For further information on Lockfast® Threadlockers please see our latest “Technical Information Sheet” here.
For more information or if you have a different question please contact us.
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