Weicon WEICONLOCK AN 302-44 Anaerobic Threadlocking Sealant

Weicon WEICONLOCK AN 302-44 Anaerobic Threadlocking Sealant is a single-component anaerobic industrial adhesive designed to secure metal threaded connections against loosening while also supporting sealing. Thanks to its higher viscosity, it provides controlled spreading in thread gaps, improving application comfort during assembly. Positioned in the medium-strength class, it aims for a locking effect that can be removed with normal hand tools under proper design and assembly conditions. Its blue color and fluorescent property offer a practical advantage for maintenance teams who want easier application control.

WEICONLOCK AN 302-44 (Blue): anaerobic locking and sealing approach

This product belongs to the industrial adhesive category, based on anaerobic chemistry that cures in metal surface gaps where oxygen is limited. By filling the microscopic voids within the thread profile, it aims to create an additional safety layer against loosening under vibration and dynamic loads. Being developed for use on passive materials indicates a target of more stable curing behavior, especially on surfaces such as stainless steel. The product is positioned for threaded connections up to M36 and helps combine both locking and sealing needs in one solution. The manufacturer is WEICON GmbH & Co. KG, and the country of origin is Germany.

Curing on passive metals, viscosity, and gap filling

The higher viscosity range of AN 302-44 (3,000–8,000 mPa·s) improves run control on threads while focusing on maintaining sufficient wetting. A maximum gap-bridging capacity of up to 0.25 mm in threaded connections can contribute to sealing continuity in assemblies where tolerances are not perfectly tight. Thanks to its fluorescent property, checking the applied areas can be faster, especially in serial production or periodic maintenance. The stated temperature resistance range of -60 °C to +200 °C is valuable for defining usage limits in many machine and equipment connections exposed to heat. Within this technical framework, the product can be considered an industrial adhesive for threaded joints that require both locking and sealing.

Removability and torque characteristics

The product is in the medium-strength class and positioned as “removable with normal hand tools,” which is important for joints requiring disassembly during maintenance. The breakaway torque is specified as 8–12 Nm and the prevailing torque as 5–8 Nm; these values represent threadlocking performance under standardized tests. According to DIN 54452, the shear strength is reported as 9–13 N/mm², helping describe the level of locking formed within the thread profile. This combination offers a more balanced solution for applications needing controlled strength rather than “permanent locking.” Proper tightening torque and suitable joint design directly affect the performance achieved with this industrial adhesive.

Application method, surface preparation, and curing process

For best results, it is recommended that assembly parts are cleaned and degreased; the cleaner the surface, the more stable the locking and sealing performance. During application, it is stated that the dosing tip should not come into direct contact with the metal surface to reduce the risk of unwanted curing inside the packaging. For sealing purposes, the product is applied in a circular pattern on the thread, the parts are assembled and tightened, and any product that has contacted metal should not be poured back into the container. Reaching handling strength typically within 20–40 minutes makes it easier to plan intermediate waiting time in the assembly flow. Final strength developing within 4–8 hours should be considered when scheduling commissioning or checks such as pressure/leak tests.

Sector-based applications, compatible systems, and key advantages

This type of anaerobic industrial adhesive is preferred in machine manufacturing and maintenance/repair to reduce the risk of loosening in bolt-nut joints exposed to vibration. The formulation suitable for passive materials can provide practical benefits in process equipment, pump/compressor groups, and general industrial plant assembly where stainless-steel fasteners are widely used. The intended application range up to M36 offers flexibility for maintenance teams working with standard fasteners in different sizes. The presence of DVGW and drinking-water-related approval information supports technical assessment for installations where compliance is required, and a hygiene-focused reference is also given under UBA KTW-BWGL. A minimum shelf life of 24 months at room temperature makes product cycle management more predictable in stock control. The combination of blue color, fluorescent visibility, and higher viscosity stands out as advantages for application inspection, reducing rework, and process standardization.