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On January 31, 2021, 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

XRT™ Ceramax™ P Proppants



XRT™ Ceramax™ P proppants are designed to be the highest strength proppants available. Use of the eXtreme Resin Technology (XRT) system to encase a high density bauxite has yielded a proppant with high conductivity and resistance to cyclic stress.

Typical Applications

Fracture treatments:

  • At closure stress up to 14,0001 psi [97 MPa]
  • At bottom-hole static temperatures from 175 - 450°F [79 - 232°C]
  • Helps prevent proppant flowback, especially under severe stress cycling
  • When wellbore clean-out is a concern

Technical Advantages and Benefits

  • Higher conductivity than uncoated bauxite
  • Proppant flowback control even under extreme conditions utilizing Stress Bond™ technology
  • Superior cyclic stress resistance
  • Temperature stability for both extended pumping and storage times
  • Increases near wellbore conductivity over uncoated ceramics

Typical Properties

Property Standard Value Unit Test Method
API Mesh Size 20/40
Bulk Density 1.92 [16.0] g/cm³ [lb/gal]
Color brownish-black
Compatibility Fully compatible with most commonly used fracturing fluids, both water and oil-based systems. Testing with fluids prior to pumping is advised.
Composition resin coated bauxite
Particle Size Distribution meets or exceeds API RP 19C
Physical State solid granule
Pipe Fill Factor 0.521 [0.0625] cm³/g [gal/lb]
Resin Type thermosetting, curable
Solubility in Water, Brine & HCl nil weight %
Solubility in HCl/HF acid, API RP 19C ≤ 3 weight %
Solubility In Oil nil weight %
Specific Gravity 3.43
Specific Volume 0.292 [0.0350] cm³/g [gal/lb]
Turbidity < 500 NTU (FTU)

1 XRT Ceramax P uses bauxite, which is the highest strength ceramic. Conductivity testing conducted up to 14,000 psi.

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