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  5. Heat-insulating paint for exterior walls (roofs, rooftops, etc.)
  6. Radiative cooling + heat-insulating paint "Radicool" [Heat stroke prevention for summer warehouses and factories]

Radiative cooling + heat-insulating paint "Radicool" [Heat stroke prevention for summer warehouses and factories]

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Radicool

last updated:Mar 06, 2026

ISHIGURO Co.,Ltd.
ISHIGURO Co.,Ltd.
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There are cases where the internal ceiling temperature has been reduced by about 20 degrees! The cutting-edge class of 'heat insulation + radiative cooling technology (high reflection + high radiation)' improves the high-temperature issues indoors! CO2 reduction as well.

We would like to introduce the cooling effect of our product 'Radi-Cool.' It is a high-performance coating that combines heat insulation and radiative cooling effects. By applying it to roofs and windows, it helps lower indoor temperatures and perceived temperatures, contributing to reduced air conditioning costs. With the addition of the technology of 'radiative cooling,' which allows materials to release absorbed heat through thermal radiation, it exhibits even higher cooling effects than insulation and heat-blocking materials! 【Examples】 - Automotive Manufacturer Service Center: Coated the roof → The internal temperature of the ceiling dropped to about 33°C without air conditioning running. The perceived temperature decreased, contributing to reduced air conditioning costs. - Trading Company Distribution Center: Coated the roof → A maximum temperature difference of about 20.7°C in the ceiling before (July) and after (August) coating! Improved working environment with a cool feel even in summer! - Public Transportation Agency: Applied to outdoor units to prevent high-pressure cuts → The internal temperature of the outdoor unit dropped by 3°C compared to using a sprinkler system, and the effectiveness and CO2 reduction were appreciated! *For more details, please download the PDF or feel free to contact us.

    Heat-insulating paint for exterior walls (roofs, rooftops, etc.)
キャプチャ.JPG

Radiative cooling + heat-insulating paint "Radicool" [Heat stroke prevention for summer warehouses and factories]

キャプチャ.JPG
キャプチャ.JPG 断熱・遮熱と放射冷却の違い.PNG サブ画像9.PNG サブ画像7.PNG 3日産自動車_サービスセンター.PNG 5通信機器.PNG 8検証データ(抜粋).PNG 9検証データ(抜粋).PNG サブ画像6.PNG 透明フィルム 放射率・透過率修正済み.PNG
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Detailed information

  • 3日産自動車_サービスセンター.PNG

    Performance verification by Nissan Motor Co., Ltd. When painted on the roof of the Nissan Service Center Co., Ltd. Kyushu branch, it was able to suppress the rise in ceiling temperature.

  • 11日産自動車_性能検証.PNG

    Performance verification by Nissan Motor Co., Ltd. - Salt spray test (paint adhesion): Tests conducted according to automotive standards (Nissan internal standards) confirmed maintenance of cooling performance. - Weather resistance test (xenon irradiation): No structural changes, no changes in radiative cooling performance.

  • 1空港施設.PNG

    Introduced measures for environmental improvement for customers and employees at the airport facilities. The surface temperature improved to -16.5°C, and the indoor temperature improved to -6.0°C. This not only enhances the perceived temperature but also contributes to reducing air conditioning costs.

  • 2空港施設.PNG

    Introduced energy-saving measures for air conditioning load at the airport facilities. The surface temperature improved to -8.3°C, and the indoor temperature improved to -4.5°C. The average energy-saving rate is 30%, which not only enhances the perceived temperature but also leads to a reduction in air conditioning costs.

  • 5通信機器.PNG

    Install film on outdoor communication equipment. The energy-saving rate before and after installation is 36%!

  • 10検証データ(キュービクル).PNG

    To prevent failures due to heat, in the solar power plant's cubicle! A difference in surface temperature of -31.6℃ was observed.

  • 12検証データ(サイロ).PNG

    Film and paint were applied to silos and tanks that require temperature management. The maximum temperature difference on the roof surface was 26.1°C, and the result inside the storage was 5.6°C.

  • 6夏季の省エネ検証.PNG

    Summer Energy Saving Verification! Maximum energy saving rate of 63.4% per day during air conditioning operation. Indoor temperature can drop by up to 16°C when air conditioning is not in operation.

  • 7冬季暖房消費電力検証.PNG

    Winter heating power consumption verification! The increase rate of heating power consumption for roofs with radiation cooling construction is 3.2% or less compared to untreated roofs. When verified throughout the year, the energy-saving rate increases.

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Paint When installed on the roof, it reduces radiant heat from the ceiling due to radiative cooling effects, resulting in a lower perceived temperature and contributing to reduced air conditioning costs.

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New technology published in the world's top scientific journal "Science"! Heat-insulating + radiative cooling paint "Radicool" _ Brochure (featuring characteristics, delivery results, etc.)

New technology published in the world's top scientific journal "Science"! Heat-insulating + radiative cooling paint "Radicool" _ Brochure (featuring characteristics, delivery results, etc.)

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We have opened a service site for the heat-shielding and radiative cooling paint "Radicool"! It is a high-performance material that contributes to compliance with regulations, heat stress measures, and energy conservation.

  • Product news

Our company offers "Radicool," a high-performance coating that not only reflects solar heat but also has a radiative cooling effect that emits infrared radiation to dissipate heat. We have recently launched an official product website aimed at companies considering heat mitigation and energy-saving measures for factories, warehouses, and logistics centers. The site clearly presents the technology's mechanism, construction examples, and effectiveness data. If you are concerned about rising roof temperatures or air conditioning costs, please take a look!

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The RADI-COOL umbrella has been selected for the "My Favorite Umbrella Selection" hosted by Tokyo Metropolitan Government!

  • Product news

On September 25, 2025 (Thursday), at the South Observation Room of the Tokyo Metropolitan Government Building, the event "My Favorite Umbrella Selection" was held, where the 55cm lightweight folding umbrella from Ogawa Co., Ltd. (Headquarters: Naka Ward, Nagoya City, President: Kyorei Ogawa), which utilizes the radiative cooling material "RADI-COOL" developed by Radicool Japan Co., Ltd. (Headquarters: Chuo Ward, Tokyo, President: Jun He), was selected as one of this year's "favorite umbrellas." For more details, please check the link below!

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From June 1, the Ministry of Health, Labour and Welfare will mandate "heat stroke prevention measures (with penalties)!" Reduce the risk of heat stroke with the heat-shielding and radiative cooling paint "Radicool."

  • Product news

From June 1, the Ministry of Health, Labour and Welfare will further strengthen measures against heat stroke in the workplace, making them mandatory. In particular, companies operating in high-temperature work environments such as warehouses, factories, and construction sites will be required to implement specific measures. Our heat-insulating and radiative cooling paint "Radicool" is a highly effective product for reducing the risk of heat stroke. With its dual effect of solar reflection and thermal radiation, it can lower the surface temperature of roofs and exterior walls by more than 20°C, contributing to reduced air conditioning loads and improved working environments. ■ Target Companies - Companies with facilities in high-temperature environments such as warehouses, factories, and construction sites (metal roofs show clear effects!) - Manufacturing, infrastructure, and distribution industries that are working on labor safety and environmental measures.

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Cooling revolution with zero energy! Implement CO2 reduction with zero energy.

New technology! Heat-insulating + radiative cooling paint "Radicool" brochure has been published!

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A new technology, the heat-insulating and radiative cooling paint "Radicool," has been published in the world's top scientific journal, "Science." "Radicool" combines traditional heat insulation effects with radiative cooling effects (i.e., heat radiation), significantly reducing the heat entering indoor spaces. It is a product that can be utilized primarily in warehouses, factories, and office buildings with metal roofs for "heat stroke prevention," "improvement of working conditions," and "CO2 reduction." We hope you take a look and find it useful.

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ISHIGURO

ISHIGURO Co.,Ltd.

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Ishiguro Co., Ltd. is a comprehensive piping materials trading company with a history of 80 years. Piping materials rarely catch the eye in everyday life, but Ishiguro has supported the supply chain of piping materials that allow people to live comfortably in various buildings, including large-scale plants, factory piping, air conditioning and sanitary facilities in skyscrapers and landmark buildings across the country, as well as in residential and non-residential structures. We purchase products such as valves, pipes, and fittings from over 600 suppliers both domestically and internationally, with a product lineup exceeding 400,000 items and a stock system of over 20,000 items in warehouses nationwide. Ishiguro Co., Ltd. is committed to connecting and supporting industries and people's lives by providing piping materials such as valves, pipes, and fittings. As a leading company in the piping materials industry, we will continue to take on new challenges and respond to the diversifying needs of our customers. As part of our new business initiatives, we handle antiviral and antibacterial coatings called "Health Bright" and heat-insulating plus radiative cooling paint called "RadiCool." We provide a safe and secure space free from the fear of infectious diseases in daily life and contribute to heatstroke prevention and improvement of working environments through radiative cooling technology.

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