Black Lightning® Coal Slag
Black Lightning® Coal Slag is one of the most versatile abrasives available and is generally used for the removal of thick coatings, rust, and mill scale. Black Lightning® Coal Slag is a widely used abrasive due to its profiling ability, economical price point, and availability. Black Lightning® Coal Slag is frequently used in new steel and steel maintenance applications such as; blasting of storage tanks, water towers, bridges, ships, structural and plate steel, offshore platforms, and oil field maintenance.


Black Lightning® Coal Slag’s unique combination of angular shape, bulk density, and hardness provides fast cleaning performance, which significantly increases production rates versus most subangular or round abrasives.


Coal Slag contains less than 0.1% free silica and is composed primarily of Aluminum Oxide and amorphous Silicon Dioxide, meeting stringent safety requirements.


Marco has Coal Slag available from over 20 shipping locations. Marco’s unmatched Coal Slag availability provides quick delivery and reduced freight costs.

Black Lightning Coal Slag Screen Analysis


Shape: Angular
Hardness: 6.0–7.0 Mohs
Bulk Density: 80–90 lbs./cu. ft.
Specific Gravity: 2.7 g/cc
Free Silica: Less Than 1%
By-product Abrasive


Recommended nozzle pressure: 90–125 psi
Recommended working distance from surface: 18–36 inches


Bulk Truck
Bulk Bags: 3,000 and 4,000 lbs
Bags: 50 and 100 lbs


Coarse (1040) Typical Profile: 4.0–5.0 mils
Medium (1240) Typical Profile: 3.5–4.0 mils
Fine (2040) Typical Profile: 2.0–2.5 mils
Extra Fine (3060) Typical Profile: 1.5–2.0 mils

Optional Accessories

Blast Hose

Blastmaster® Abrasive Blasting Hose

Blastmaster® Abrasive Blasting Hose is available in standard lengths of 50, 100 and 400 feet, and custom lengths up to 200 feet.

Blast Nozzles

Abrasive Blasting Nozzles

A wide variety of blast nozzles are available to meet even the most challenging work site requirements.

Blastmaster® Abrasive Metering Valves

Blastmaster® Abrasive Metering Valves

Marco’s wide selection of Blastmaster® Abrasive Metering Valves give you variable and instant abrasive control for great results on every work site.

Couplings and Blast Nozzle Holders

Couplings and Nozzle Holders

Marco offers several types of couplings and blast nozzle holders to meet the needs of a wide variety of applications.


Technical Information


Inhaling dusts from abrasive blasting may result in serious injury, disease, or death.
According to OSHA, only a Type CE NIOSH-certified blasting airline respirator with positive pressure blasting helmet should be used for abrasive blasting.

Product details are based on published information at the time of publication. Product details are subject to change without notice. Contact Marco for more information.