C-RAM: HC

Broadband Honeycomb Microwave Absorber

PPG C-RAM® HC is a series of high power radar absorbing material made from Nomex/phenolic honeycomb with a proprietary lossy coating, available in three different types listed below.

  • Standard sheet size is 12”x12” or 24”x24”.
  • Standard thicknesses are: 0.500, 0.625, 0.750, 1.000, 2.000, 3.000 and 4.000 inches.
  • Standard cell size is 3/16 inch (1/8 and 1/4 inch cell size is also available upon request).
  • PPG C-RAM® HC can be supplied in other sizes, thickness or per customer specified configurations upon request.

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Product Details
Types of C-RAM HC High Power Radar Absorbing Material
  1. The hexagonal open cell structure provides a high strength-to-weight ratio, making PPG C-RAM HC an ideal material for aircraft parts, such as fairings, covers and leading edges, which must combine strength, light weight and low radar reflections.
  2. PPG C-RAM HC is also ideal for cavity backed spiral antenna applications. The open cell structure permit forced air cooling, allowing high-power applications. On special order, skins can be applied on the PPG C-RAM HC material, typically fiberglass material.
  3. PPG C-RAM HC with no forced air can handle up to 10 W/in² of RF energy, Power handling can be increased with forced air cooling through the material cells.
Service temperature
  • 400°F
Shelf life
  • 5 yrs. Minimum