Pre-applied locking coatings
Purpose of a self-locking fastener
The focus of the threadlocker is on maximum retention of the preload during the product's service life. An important side effect is its sealing properties.
How a chemical threadlocker works
The reactive precote® products are a thread coating with two encapsulated reaction partners - both reaction partners, acrylates and peroxides, are encapsulated in precote® . The curing process is based on radical polymerization.
- With the help of omniTECHNIK microencapsulation technology, droplets of the multi-component acrylate system are surrounded by a thin polymer wall. The resulting microencapsulated individual components are incorporated into a lacquer-like binder system.
- After application and drying, a dry, non-slip and corrosion-inhibiting layer is formed, which is securely bonded to the thread after application.
- A micro-encapsulated adhesive is a pre-coating applied to the thread of the screw, which is activated by the pressure and shear stress that occurs during assembly. After curing, the threads are secured against loss of preload force and reliably sealed.
- Curing begins with the first contact with the coating. The last movement between screw and nut is permitted up to 5 minutes after the start of assembly.
- After screwing, the adhesive reaches its maximum strength after approx. 24 hours.
- All our precote® products are removable when used correctly.
Sealing effect of reactive precote® products
The precote® coating is always a homogeneous, all-round coating. Polymerization seals the threads over the entire thread circumference, ensuring a reliable seal. For a reliable sealing function, a coating length of at least 4 thread turns, mounted overlapping, is required. When cured, precote® can absorb very high pressures. The sealing effect prevents corrosion in the thread gap in the area of the coating.
Locking Products
