STKO 22 – Alumino Silicate Sand (Grain)

STKO 22 is an alumino silicate, high-quality sand for precision investment casting use.

Engineered for superior refractoriness and thermal stability, STKO 22 is a trusted alumino silicate grain ideal for building strong ceramic shell molds in the investment casting process. With a grain size predominantly between U.S. #30 and #50 sieves (approximately 300–600 microns), it delivers excellent consistency and flow in both primary and backup slurry layers. STKO 22 offers strong compatibility with colloidal silica and ethyl silicate binders, supporting a clean, uniform build with minimal fines. The angular grain structure enhances slurry adhesion and helps reduce shell defects, leading to improved casting yields and smoother surface finishes. Ideal for foundries casting aerospace alloys, stainless steel, and other precision metals, STKO 22 is a dependable media in demanding high-temperature environments.

Common uses:

- Primary and secondary shell coat applications
- Ceramic slurry reinforcement
- Foundry casting processes requiring high dimensional stability and thermal resistance

Ships in Bags. Larger orders available in Super Sacks.