HIREC® super hydrophobic coating | Equipment Maintenance | NTT-AT NTT-AT Leading-Edge Key Technology Product Information

2025/ 11.14

PFAS-free series of super hydrophobic coating "HIREC" now on sale (PR TIMES website)
2025/ 10.09

Successfully made super hydrophobic coating "HIREC" PFAS-free
~Product design that takes into account the global trend of PFAS regulations~
2025/ 09.02

NTT-AT launches new super hydrophobic coating "HIREC-RAS" (PR TIMES website)
2025/ 06.26

NTT-AT launches new super hydrophobic coating "HIREC-R"
- Maintaining the super water repellency of HIREC100 while improving supply stability -
2024/ 12.19

Announcement of the renewal of super hydrophobic coating HIREC

super hydrophobic coating that dramatically changes the concept of conventional Super hydrophobic-repellent materials

Water droplets that resemble spheres on a HIREC-coated surface

Comparison of snow accretion between HIREC coated surface and uncoated surface — Photos provided by partner companies

Initial contact angle exceeds 150°
Extremely water repellency

The photo shows water droplets dripped onto a HIREC painted surface.
Due to the super water repellency of the coating surface, water droplets become almost spherical, so a water film is hardly formed.

Maintains long-term water repellency
Self-cleaning function

The self-cleaning function using photocatalyst ensures that a clean coating surface is always exposed.
This ensures that water repellency remains for a long period of time.
*HIREC450 and HIREC1450NF are primarily for indoor use and do not have a self-cleaning function.

Also effective in reducing snow and ice buildup

The photo shows an example of snow accumulation reduction using HIREC coating. On the left side, a large amount of snow has accumulated on the uncoated HIREC surface, but on the right side, the HIREC coated surface, the snow falls off before it can pile up too high.

Features of HIREC

Overwhelming water repellency

On a HIREC coated surface, water droplets maintain an almost spherical shape, demonstrating super water repellency that prevent them from remaining in place.

Contact angle of typical fluorine-treated products: Approximately 100°

HIREC initial contact angle: 150° or more

Self-cleaning function using photocatalyst

HIREC-R, HIREC1100, and HIREC300-W have a self-cleaning function due to the photocatalytic effect.

Dust and dirt present in the air will adhere to Super hydrophobic and generally cause water repellency to gradually decrease. In addition, the ultraviolet rays contained in sunlight will cause the coating surface to deteriorate, which will also cause water repellency to decrease.

On the other hand, the HIREC series contains photocatalytic materials that, even if dirt adheres to the surface, exhibit a self-cleaning function when exposed to sunlight, revealing a new, water repellency repellent surface.

This function is expected to enable the paint to maintain its super water repellency water repellency for approximately three years, which is a long period for a super water-repellent paint ^*.

Change in contact angle during outdoor exposure

The self-cleaning effect of HIREC has also been made clear in comparative tests with other companies' products.

Change in contact angle during outdoor exposure (comparison with competitor's products) See more details

* This is the period during which performance can be expected to be maintained when the recommended film thickness (approximately 30 μm) is applied. The period during which the super water repellency is maintained varies depending on the usage environment, etc., so we cannot guarantee the period during which performance is maintained.

Also effective in preventing snow accumulation

By applying HIREC in advance, you can prevent snow, ice, and icicles from accumulating, reducing damage caused by falling snow and ice.

Click here for customer application examples

Main usage scenarios

Prevention of water film formation

Prevents radio wave attenuation caused by water films on antennas and radomes during rain and snowfall

Communications (5G, IoT, microwave/mm wave, etc.)
Radar (X-band, C-band, etc.)
Broadcast (satellite TV, etc.)

Snow and ice prevention

Prevent accidents caused by falling snow and ice

steel tower
bridge
monorail vehicle
Structure
Wind power generation
Further measures to prevent snow buildup on communication cables

Prevention of droplet adhesion

Anemometer
Other precision equipment

Ensuring insulation

It is applied to insulators, etc. to prevent electrical conductivity caused by adhesion of seawater and sea salt particles.

HIREC's insulation properties We will introduce you to the following.

oil water separation

Repels water but not oil

Utilization of HIREC oil/water separation We will introduce you to the following.

Works of art

HIREC protects works of art from the rain in New York.A work of art that does not get wet Counting Sheep
Maze treated with Super hydrophobic HIREC. Roll the polka dots and aim for the goal!The polka dots are rolling.

HIREC demo video

Video 1: Comparison of water repellency between HIREC and general paint

Video 2: Water won't pass through the tea strainer!? The amazing water repellency Super hydrophobic coating HIREC

Various compatibility information/trademarks

super hydrophobic coating HIREC complies with the RoHS Directive.

HIREC is a registered trademark of NTT Advanced Technology Corporation.

This project is part of the "NTT G×Inno^"GX solution brand being developed by the NTT Group.
*"NTT G×Inno" is a registered trademark of Nippon Telegraph and Telephone Corporation.
It is an abbreviation for "NTT GX (Green Transformation) x Innovation" and aims to provide solutions to society through
This is an initiative to bring about innovation in the GX field and contribute to achieving carbon neutrality by 2050.

For inquiries regarding super hydrophobic coating HIREC, please contact us here.

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Super hydrophobic coating HIREC®