Weicon NSF-Approved Anti-Seize Assembly Spray ASW 400, 400 ml

Weicon NSF-Approved Anti-Seize Assembly Spray ASW 400 is a technical spray solution designed to make assembly easier on high-load bolt-nut and flanged connections, reduce the risk of seizing during disassembly, and form a protective film against corrosion. The product helps manage typical assembly-related problems such as wear, adhesion, stick-slip effects, oxidation, and “cold welding” caused by electrolytic reactions. Its spray application allows maintenance teams to create a fast, uniform film on site. The manufacturer is WEICON GmbH & Co. KG (Germany), and the product is positioned within WEICON’s assembly-focused technical spray range.

ASW 400 technical spray description and chemical/technical structure
ASW 400 is a white, metal-free anti-seize assembly product formulated to leave a separating and protective layer on the surface. The base oil is specified as a mineral oil classified as “medical white oil,” which contributes to balancing friction during assembly. It is stated to be neutral toward materials and focused on protecting surfaces through assembly/disassembly cycles. In this respect, ASW 400 offers an alternative technical spray approach, especially in processes where metal-containing products are not desired.

Field advantages of the metal-free white formulation
The metal-free structure is positioned to help reduce the risk of electrolytic reactions that metal-containing pastes may trigger in some applications. It is also highlighted for use scenarios where nickel-containing products are not preferred due to health or process requirements. The white film layer provides a more controlled appearance in assembly points where dark-colored products are not desirable. This combination supports technical spray use that brings a “protect-separate-lubricate” approach into a single application for connections operating under high temperature and high load.

NSF approval and compliance note
An NSF test/compliance statement is provided for the product, which can be considered a helpful designation for procurement and audit processes, especially in hygiene-sensitive facilities. Since certification/compliance declarations can vary depending on the application scope, if your operating procedures require a specific NSF class or impose use restrictions, it should be verified together with the relevant product documentation. This approach helps prevent incorrect product selection in regulated sectors such as food, beverage, and packaging. When compliance is ensured, ASW 400 is positioned as a safe and traceable technical spray alternative in maintenance routines.

ASW 400 performance characteristics, durability, and application method
ASW 400’s temperature resistance is given as -40 °C to +1,400 °C, supporting use on connection points exposed to high heat. In the VKA test, load values are reported as 3,600 N and 3,800 N; additionally, a compressive strength of 230 N/mm² supports maintaining the film layer under demanding assembly conditions. A salt spray test result stated as over 170 hours aligns with the intended use logic of protecting fasteners in humid and corrosive environments. The application goal is to create a thin, uniform film on a clean, dry surface; for threaded connections, applying so it penetrates into the thread roots is important for easy disassembly.

Sector-based applications and compatible surfaces
The product is intended for anti-seize use on metal surfaces such as steel, stainless steel, and cast iron, for bolts and nuts, studs, flanges, joints, and other removable connections. In the energy and process industries, it provides assembly and maintenance convenience at points exposed to temperature cycling such as furnace equipment, steam lines, and heat exchanger connections. In automotive and heavy-vehicle maintenance, it can be used on exhaust joints and bolts in high-heat areas; in metalworking and machine manufacturing, on connections requiring service; and in maritime and port applications, against corrosion risk accelerated by salty atmospheres. This range of use cases highlights ASW 400 as a practical, high-temperature-resistant technical spray for field use.