The MASTICORD random oriented fiber (ROF) and rubber composition pad is used primarily in precast concrete commercial structural applications, but is also used in short-span precast concrete bridges and structural steel bearings.

The firm published its original MASTICORD Design Guide in 1982. Product improvements led to a second edition in 1984 and ongoing improvements and testing resulted in a third edition published in 1987.

All research and development of the MASTICORD program has been with the collaboration of Raths, Raths & Johnson structural engineers of Willowbrook, Illinois. The MASTICORD Design Guide continues to be the "bible" of the precast concrete industry.

MASTICORD can be provided with a bonded DYNALON (PTFE) surface for use in expansion bearing. 

MASTICORD is availabe in the following stock thicknesses: 1/4", 3/8", 1/2", 3/4", 1".  For Additional thickness requests, please contact us.


  • Random-oriented Fiber Pad (ROF) -Engineering Specifications
  • Especially suited for precast prestressed concrete structures
  • Engineered for predictable performance parameters
  • High compressive loading capacity - up to 10,000 P.S.I.
  • Tough and durable as gaskets, motor mounts, and wear pads in heavy equipment
  • Homogeneous composition of rubber mastic reinforced with high strength random fiber cords
  • Economical



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