Weicon WEICONLOCK AN 302-45 Anaerobic Thread Sealant

Weicon WEICONLOCK AN 302-45 Anaerobic Thread Sealant is an anaerobic industrial adhesive designed to provide sealing—especially on coarse-threaded connections—and to reduce loosening due to vibration. Thanks to its anaerobic curing mechanism, it hardens between metal threads where oxygen is limited, aiming to fill the thread gaps and form a sealing line. Its medium-strength class allows the joint to be removed with standard hand tools during service while focusing on maintaining assembly security. The blue, fluorescent character is a practical detail that makes application control easier.

Threaded-joint sealing with WEICONLOCK AN 302-45
This product is positioned as a high-viscosity anaerobic industrial adhesive/thread sealing compound used in threaded joints of pipes and fittings. The high viscosity helps the product stay on the thread without running and supports more controlled application, especially on coarse threads. The mention of DVGW approval can be a reason for preference in water-related installation applications in terms of process compliance. By filling thread voids, it aims to reduce micro-leak paths while also providing a locking effect that supports resistance to loosening.

Technical performance and resistance parameters
AN 302-45 is specified with a Brookfield viscosity of 6,000–30,000 mPa·s at 25 °C, indicating that a “thick” behavior should be expected during application. A maximum gap-filling capacity of 0.30 mm is defined to support continuity of the sealing line on tolerance-prone threads. The medium-strength class is described with a breakaway torque of 10–15 Nm and a prevailing torque of 12–18 Nm, aiming to balance security with removability. Reaching handling strength in 15–30 minutes and requiring 3–6 hours for full strength supports maintenance-window planning. Since temperature resistance is specified as -60 °C to +150 °C, a stable, non-elastic sealing line is targeted under varying service conditions.

Application method and surface preparation
For best results with this type of anaerobic industrial adhesive, cleaning and degreasing the threads is recommended; a cleaner surface supports more consistent performance. The product is applied circumferentially onto the thread using the dosing nozzle, and direct contact between the nozzle and metal is to be avoided. The parts are assembled and tightened to the desired alignment; in uses such as flange sealing, a continuous bead can be applied to one surface for fast assembly. It is especially emphasized not to pour product that has contacted metal back into the bottle, because even very small metal particles can cause premature curing inside the container. In serial applications, using a dosing device offers advantages in both cleanliness and repeatability of quantity.

Sector-specific use areas and compatible systems
This industrial adhesive is used on points that require sealing and loosening control, such as coarse-threaded pipe connections and fittings (couplings, connectors). A specified use range up to M 80 / R 3″ thread sizes provides an application area for large-diameter installations and process lines as well. Together with DVGW approval, it can offer an option that helps simplify documentation for water installations and related equipment assembly. In HVAC installations, maintenance units, industrial piping, and equipment assembly, it focuses on supporting the sealing line in threaded joints exposed to vibration, pressure changes, and thermal cycling. With proper surface preparation and controlled dosing, the goals are to reduce leakage risk, keep the joint stable throughout service, and preserve removability when needed.