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DuPont Starblast


Starblast® is a general-purpose staurolite abrasive used in steel fabrication and bridge maintenance to remove rust, mill scale, and weathered coatings. Starblast® XL, at less than 1% free crystalline silica, meets the most stringent industry and military specifications.

Starblast® and Starblast® XL offer the same product advantages, such as:


Department of Transportation (DOT) Hazard Classification:* NOT REGULATED.

Typical Screen Analysis

U.S Sieve No
Sieve Opening, µm
Retained on Sieve
40 420 3
50 300 13
70 212 25
100 150 36
140 106 18
200 75 3
270 53 <1
PAN <53 <1
Grit #54/90 - -
*U.S. Sieve Series according to ASTM E-11-70.

Physical Properties

Bulk Density (compacted) 143-148lb/ft³
Bulk Density (loose) 128 lb/ft³
Specific Gravity 3.5-3.85
Hardness (Mohs) 6.5-7.0

Mineral Composition

Starblast® Typical, %
Starblast® XL Typical, %
Staurolite Minerals (FeAL5Si2O12OH) 87 90
Titanium Minerals (Fe2Ti2O7) 6 6
Kyanite (Al2SiO5> 2 1
Zircon (AZSiO5) 3 2
Quartz (Free Silica) 2 0.8
*This column gives typical analyses based on historical production performance. DuPont does not express or imply any warranty guaranteeing that future production will demonstrate or continue to possess these typical properties.

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