Plastic threadlockers are adhesive compounds used to secure threaded fasteners, such as screws and bolts, to prevent them from loosening due to vibration, shock, or thermal expansion. These threadlockers are typically anaerobic adhesives, meaning they cure in the absence of air and in the presence of metal ions. They are applied as a liquid to the threads of a fastener before assembly, and once the fastener is tightened, the threadlocker fills the gaps between the threads, hardening to form a solid bond.
Plastic threadlockers are available in various strengths, ranging from low to high, to accommodate different applications. Low-strength threadlockers are suitable for fasteners that may need to be removed or adjusted frequently, while high-strength versions are used for permanent assemblies where disassembly is not intended. Medium-strength threadlockers offer a balance between secure fastening and removability.
These adhesives are resistant to a wide range of environmental factors, including chemicals, moisture, and temperature variations, making them suitable for use in automotive, aerospace, industrial, and consumer electronics applications. They help maintain the integrity of assemblies by preventing loosening, corrosion, and leakage.
Plastic threadlockers are advantageous because they eliminate the need for mechanical locking devices like washers or lock nuts, reducing weight and simplifying assembly processes. They also distribute stress evenly across the fastener, enhancing the overall durability of the joint.
When using plastic threadlockers, it is important to ensure that the surfaces are clean and free of contaminants to achieve optimal adhesion. Additionally, the correct strength and type of threadlocker should be selected based on the specific requirements of the application.