How To Choose The Right Abrasive for Sandblasting?

Industry data shows that up to 80% of coating failures result from inadequate surface preparation. Often, the root cause is the wrong choice of abrasive.

Low-purity abrasives such as copper slag or coal slag contain residual heavy metals, high levels of soluble salts, and irregular particle shapes. Instead of creating a clean surface ready for coating, they leave behind contaminants that compromise adhesion. The result blistering, cracking, or peeling within months. Rust reappears. Rework drives up costs and delays projects.

Garnet offers a different outcome. As a natural mineral with Mohs hardness of 7.5–8.0, garnet delivers sharp, angular particles that cut efficiently without breaking down prematurely. Its high density provides strong impact for thorough cleaning, while its natural purity ensures no free silica or hazardous heavy metals.

High-purity garnet is naturally free of harmful impurities. Its low chloride content ensures that soluble salts do not remain on the blasted surface—eliminating the risk of under-film corrosion. Sharp, angular particles create a uniform roughness, giving coatings a strong, lasting bond. Low dust content protects both equipment and operators, while consistent particle sizing ensures stable performance.

When you choose the right abrasive, you protect your coating investment. When you choose SEPPE alluvial pink garnet, you start with a surface that is clean, compliant, and ready to perform.

For more information, please contact us at info@seppe.cn.