Radiative Cooling Principle: Rare Earth Coatings Explained

Radiative Cooling Principle for Coatings

Stay Cooler, Naturally with Rare Earth Technology

Easyto’s EnduRE30C™ Rare Earth Coatings use advanced radiative cooling to keep building surfaces dramatically cooler under the sun. Unlike traditional paints that only reflect visible light, our coatings combine thermal barrier, solar reflection, and natural radiative emission for all-round heat control. This results in lower indoor temperatures, reduced HVAC loads, and improved energy efficiency.

How Radiative Cooling Works

Radiative Cooling Principle Diagram

The coating structure consists of multiple functional layers: a protective surface, a rare earth radiative cooling layer, and a heat-insulating substrate. Together, these layers reflect, block, and re-radiate solar energy — ensuring surfaces stay cooler without compromising durability or aesthetics.

Three Key Mechanisms

1. Thermal Barrier

Heat conduction is reduced by using rare earth materials with low thermal conductivity, preventing excess heat from transferring indoors.

2. Thermal Reflection

The coating reflects solar radiation energy across a wide wavelength range (200–2500nm), reducing the amount of heat absorbed by the building surface.

3. Thermal Radiation

Any absorbed solar energy is re-emitted as harmless far-infrared radiation (8–13μm) back into the sky through the atmospheric window — a natural, maintenance-free cooling process.

Why Rare Earth Makes the Difference

Unlike conventional titanium-based paints, Easyto’s rare earth coatings maintain high stability, strong solar rejection, and long-term weather resistance. This ensures performance does not fade with time and continues to deliver measurable energy savings year after year.

Real-World Benefits

  • ✔ Surface temperature reduction up to 30°C
  • ✔ Indoor cooling by 5–11°C
  • ✔ 25–40% reduction in air conditioning energy load
  • ✔ Longer service life with no yellowing or chalking
  • ✔ Passive, maintenance-free cooling

Applications

Radiative cooling coatings are ideal for metal roofs, warehouses, demountable, telecom cabinets, tanks, animal barns, and more. By staying cooler naturally, these coatings extend material lifespan, improve occupant comfort, and lower operating costs.