STKO 150 – Alumino Silicate Flour

STKO 150 is an alumino silicate, high-quality flour for precision investment casting use.

STKO 150 is one of the finest refractory flours in the STKO line, specifically formulated for high-detail primary slurry coats. It delivers ultra-fine particle performance—typically 30–40 µm (approximately U.S. #400–#500 mesh)—to ensure exceptional surface finish, sharp detail definition, and smooth castings. This flour blends seamlessly with colloidal silica binder systems, maintaining stable suspension and uniform coverage during slurry application. Its tightly controlled particle size distribution and low impurity levels help reduce surface defects, inclusions, and inconsistencies. STKO 150 offers the high refractoriness and low expansion characteristics essential for demanding applications like aerospace, medical, and intricate industrial castings, while its consistency supports reliable slurry performance across production cycles.

Common uses include primary slurry applications where maximum surface smoothness, fine detail reproduction, and binder compatibility are essential.

Ships in Bags. Larger orders available in Super Sacks.