Guyson Sinterball is a high quality aluminium oxide blast medium specifically developed to provide excellent cutting power and durability. It is often used as an alternative to brown safftigrit. Sinterball is manufactured by sintering various mineral compounds at high temperatures to produce a hard, dense, spherical medium.

Due to its method of manufacture, Sinterball wears surfaces away rather than relying on the jagged profile associated with normal alumina products. This provides low dust levels and a longer product life. As the particle size remains more consistent, Sinterball is manufactured in only a few selected mesh sizes.