Thread locking agent to the screw of M20 or less  Thread-locking agent is also called anaerobic adhesive. It means that when the glue is not exposed to air, the screw glue will be solidified. Therefore, on the packaging, the bottle contains only half of the glue, and the other half is air. It is to prevent the glue from curing.  The screws below M20 can use Xinwei 243 screw locking agent. The characteristics of this glue are as follows: 1 , fast curing, can be used for inert surfaces, good oil retention, easy to disassemble. It can be used on working surfaces that are slightly oily. 2. Can be used for locking and sealing of M20 thread below.  If you still need to learn more about the three anti-paint related information, you can log on to the official website of Xinwei to check, the information inside is very complete: http: Hydrophilic Fumed Silica,Fumed Silica Powder,Silica Fume,Amorphous Fumed Silica Guangzhou Quanxu Technology Co Ltd , https://www.anticorrosionpigment.com