HIREC 100 is not a clear coating. The finished surface will appear opaque. HIREC100 can be colored if desired.

Key Features

Applications: Parabolic Antennas, Satellite Dishes, Radomes, Steel Towers, Bridges, and others
Undercoating: Requires primer coating
Application Equipment: Customized roller
Lifespan: Three seasons (years) outdoors
Best for Repelling: Water and snow
Film Thickness: about 30 microns
Coating Area: 4 sq. meter/kg (43 sq. ft/kg)

Additional Information About HIREC

The HIREC coating is a soft coating, and therefore is not tolerant against abrasion. Rubbing scratching, or otherwise interfering with the surface would damage the coating. For this reason, we do not recommend HIREC to be used in applications which requires constant touching, contact, or knowingly abrasive environment such as use in automobile or other mobile units.

Also to note that the repellency of the coating deteriorates from dirt, pollution, or oily substances such as mechanical oil and finger oil. However for HIREC100 series, the self-cleaning action of the HIREC 100 series exfoliates most of the contamination when it is exposed to sunlight and gradually regains its hydrophobicity.


Applications for the HIREC100 super water repellent nanocoating

HIREC is highly effective for preventing water accumulation on radars, antennas, and radomes as a water repellency preventing the formation of water film.

It is also highly effective as a countermeasure to improve and maintain performance of antennas, pylons, bridges, and towers in snowy or icy climates.

With HIREC nanocoating
Without HIREC nanocoating


HIREC Prevents Deterioration of Broadcast Reception Caused by Snow Accretion on Antennas

Antenna Coated with HIREC
  • Shows stable broadcast reception and no deterioration in carrier to noise ratio C/N during and after snow falls
  • Not much difference found between the antenna with a heater and the antenna without heater
  • No water film was formed on the surface of the antenna
Antenna without HIREC
  • Show 4-8dB deterioration in carrier to noise ratio C/N during snowfall
  • the deterioration remained after snowfall due to remaining snow and ice on the antennas
  • Even after the snow, the deterioration in C/N continued for a while due to remaining water film
  • The deterioration raised again after the snow cleared, which was caused by  the water film formed by the melting snow


Even a light rain forming a water film on the surface of a radome can cause signal reduction.

the water film thickness changes depending on rainfall intensity, radome material, surface condition and so on.

Notable signal reduction due to a water film on the radome during heavy rainfall periods can cause extreme narrowing of the observational range.

for example, a rainfall of 30 mm/hr forming a 0.2 mm thick water film on a radome without HIREC may result in a 5.0 dB attenuation. Observation range is then narrowed to 10 km compared from 80 km in normal condition.


  • Rain water runs into drops at the surface, flicking and falling out of the surface
  • No water film is formed
Without HIREC
  • Rain water wets the surface and water waves run down the surface
  • Radome surface is covered by a water film


HIREC’s Sterling Photocatalyst Self-Cleaning Mechanism

HIREC Self-Cleaning Mechanism Utilizing Photooxidation

Surfaces of the field constructions get dirty by a variety of grit and dust, oily and organic matters contained in the emissions, bird droppings, and so on.

The oily or organic materials deteriorate water repellency and grime airborne frit, dust and ash on it. The grimed dirt sticking on the surface may not be washed out by a rainfall which may cause the water repellency of the surface to deteriorate.

  • HIREC integrates photocatalytic material which has strong UV photooxidation
  • The photocatalytic material photo oxidizes and decomposes the oily and organic matters by UV light
  • The decomposed oily and organic dirt griming grit and dust become easy to peel off and are to be washed out by a rainfall
  • In addition, the surface layer of HIREC is also decomposed in molecular level, and thus a fresh HIREC surface is formed constantly