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On February 1, 2022, Hexion Holdings Corporation announced that it has completed the sale of its Coatings and Composite businesses, which includes the epoxy specialty resins and base epoxy resins and intermediates product lines, to Westlake Chemical Corporation. For epoxy coatings and composite product inquiries, please contact customer service at or

Black Pro™ Proppants


Black Pro

Black Pro proppants are an advanced curable resin coated fracturing sand available in a 40/70 mesh size.  Black Pro resin is applied to a high quality frac sand. Incorporating Hexion’s Stress Bond technology, the proppant bonds in the fracture with closure stress, providing high conductivity and proppant flowback control.

Typical Applications

Fracture treatments:

  • At closure stress up to 12,000 psi [83 MPa]
  • Where high conductivity and proppant flowback control are desired

Technical Advantages and Benefits

  •  Reduces proppant fines generation and migration 
  •  Helps prevent proppant flowback 
  •  Stress Bond technology helps prevent wellbore consolidation 
  •  Frac fluid and breaker friendly 

Typical Properties

Property Standard Value Unit Test Method
Absolute Volume 0.385 [0.0461] cm³/g [gal/lb]
API Mesh Size 40/70
Bulk Density 1.47 [12.3] g/cm³ [lb/gal]
Color pink to red
Composition resin coated frac sand
Median Particle Diameter 0.3036 mm
Particle Size Distribution meets or exceeds API RP 19C
Physical State solid granule
Pipe Fill Factor 0.680 [0.0813] cm³/g [gal/lb]
Resin Type thermosetting, curable
Solubility in Water, Brine & HCl nil
Specific gravity 2.60
Turbidity 250 NTU (FTU)

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