"Breathable" Paint Keeps Buildings Cool Even in Hot and Humid Cities

“Breathable” Paint Keeps Buildings Cool Even in Hot and Humid Cities

Written by Fabio Lucas Carvalho

Published on 25/06/2025 at 23:48

Updated on 25/06/2025 at 23:51

Foto: Reprodução

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New Paint Developed in Singapore Reduces Air Conditioning Use by Up to 40% Even in Hot and Humid Climates and Resists Yellowing for Years.

A paint developed by scientists in Singapore could transform the way houses are cooled in hot and humid regions. The new material lowers building temperatures and decreases the need for air conditioning, even in intense climates.

Combination of Technologies

Unlike conventional paints, this innovative formula combines three mechanisms: radiative cooling, solar reflection, and evaporative cooling.

The cement-based and porous structure of the paint allows it to retain water and release it slowly, much like it is “sweating.”

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High Reflectivity and Durability

Efficiency is not just in cooling. The new paint also reflected between 88% and 92% of sunlight, preventing heat from entering. Another highlight was its resistance to weather.

After two years of heat and humidity, traditional paints yellowed. The new formula maintained its white color, thanks to special nanoparticles that enhance reflectivity and preserve appearance.

Impact on Hot Cities

The discovery has the potential to drastically reduce energy use in places like Singapore and countries in the Middle East, where buildings use up to 60% of electricity just for air conditioning.

Additionally, it could help combat the urban heat island effect, common in urban centers with concrete and asphalt accumulating heat.

The study was published this month in the scientific journal Science, paving the way for new solutions in urban thermal efficiency.

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“Breathable” Paint Keeps Buildings Cool Even in Hot and Humid Cities

New Paint Developed in Singapore Reduces Air Conditioning Use by Up to 40% Even in Hot and Humid Climates and Resists Yellowing for Years.

Combination of Technologies

High Reflectivity and Durability

Impact on Hot Cities

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“Breathable” Paint Keeps Buildings Cool Even in Hot and Humid Cities

New Paint Developed in Singapore Reduces Air Conditioning Use by Up to 40% Even in Hot and Humid Climates and Resists Yellowing for Years.

Combination of Technologies

High Reflectivity and Durability

Impact on Hot Cities

In the cold desert of Ladakh, where it hardly rains, engineer Sonam Wangchuk created the ice stupa, a tower that freezes winter water and stores it for irrigating crops in the spring, a simple engineering feat that mimics nature.

Libya built over 4,000 kilometers of underground pipelines to bring water from the Sahara to coastal cities in a project that the government itself called the Eighth Wonder of the World.

Chinese woman planted trees for decades while sand buried part of her house, received $5,000 from an American in 1999, and helped transform the desert into a forest of 8 million trees in China.

Desert sand, previously discarded for being too smooth for concrete, becomes an ecological brick in the United Arab Emirates, dispensing with Portland cement, curing at room temperature, and attempting to transform dunes useless for construction into raw material for a new arid engineering.

Almost 6,000 residents live concentrated along a single street nearly 9 km long in the interior of Poland. Houses form a continuous row, and behind them, narrow agricultural strips emerge, creating one of the most unusual rural patterns in Europe.

Described by astronauts as one of the most unlikely natural phenomena on Earth, the Okavango Delta spreads over up to 15,000 square kilometers in the middle of the desert and transforms Botswana into a living labyrinth of channels, islands, and flooded areas.

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