Engineered blends, explained

Typical sandblasting media is generally one-dimensional, containing either coarse or fine grains. GMA's range of Engineered Blend garnet abrasives are a unique mix of coarse and fine garnet grains, achieving the optimal balance between cutting power and cleaning ability. 

Grain size matters

Coarse grains can cut through thick coatings and create a deep surface profile, but leave behind significant surface embedment. Used alone they cannot thoroughly clean small valleys or pits, resulting in slow cleaning rates, high abrasive consumption, and a higher risk of corrosion and coating failure.

The cause for change

Fine grains produce a cleaner surface and are more efficient at removing thin coatings like mill scale than coarse grains. However, they are ineffective for thick coating removal and cannot produce the deep surface profile depth required for many industrial coatings.

In choosing traditional abrasives, coatings can either be removed, or the surface can be cleaned – not both at the same time.

A more efficient abrasive

GMA Garnet™ Engineered Blends deliver optimised blasting performance in specific applications. Coarse grains cut through coatings fast and create the required profile depth, while fine grains clean the anchor profile and improve blasting efficiency.

GMA Garnet™ delivers fast and effective coating and rust removal at the lowest possible consumption rate, leaving the cleanest surface ready for inspection and coating application.