Blue Diamond Materials was established by sister company, United Rock Products, which has been mining construction aggregates in the San Gabriel Valley since 1916. Blue Diamond Materials provides hot and warm mix asphalt materials for projects within Los Angeles, Orange, Ventura, San Bernardino and Riverside County.  Six strategically positioned Blue Diamond Materials plant locations safely process the asphalt; emulsion and seal coat are also available at select plant locations. Blue Diamond Materials is part of Sully-Miller Companies consisting of Sully-Miller Contracting, United Rock and Blue Diamond Materials.


Every one of Blue Diamond Materials’ six plants are recognized for superior asphalt plant operations, asphalt production, and asphalt terminal operations by the National Asphalt Pavement Association (NAPA):

  • Diamond Achievement Award
  • Diamond Quality Award

No other asphalt producer in Southern California has achieved this status.


Blue Diamond Materials provides Hot and Warm Mix Asphalt materials and specialty mixes for use on runways, seaports, parking lots and public highways - meeting or surpassing the standards of Caltrans, Greenbook, City of Los Angeles Brownbook and the FAA.

  • Terminal Blend TR
  • EcoMat®- Warm Mix Asphalt
  • Perpetual Pavement
  • Super Cold Mix "Temporary Asphalt"

Plus more >