What should be considered for outdoor use of luminous powder?

Content Overview: Waterproof coated luminous powder must be used for outdoor applications. Our sky blue series is inherently waterproof, and other colors can also be treated for water resistance.

Luminous powders intended for outdoor applications must possess superior durability and stability. The most critical factor among these attributes is water resistance. Ordinary luminous powders are highly susceptible to hydrolysis upon contact with moisture—whether from rainwater, humid environments, or prolonged exposure to outdoor climatic conditions. This hydrolytic degradation compromises the structural integrity of the luminescent matrix, leading to a decline in brightness and a reduction in service life.

To ensure reliability in outdoor settings, it is imperative to select luminous powders that have undergone specialized water-resistant surface treatment.

Thanks to a proprietary surface treatment process and a unique layered crystalline structure, iSuoChem’s "Sky Blue" series achieves true water resistance. These products are ideally suited for outdoor signage, landscaping, architectural ornamentation, and marine environment applications. Furthermore, we have developed customized water-resistant coating solutions for other color families—including yellow-green, aqua-blue, purple, and pink—to safeguard the pigments against moisture penetration without compromising their afterglow brightness or light-storage efficiency.

Outdoor applications demand more than just water resistance; the luminescent material must also demonstrate robust UV stability, thermal cycling resistance, and mechanical abrasion resistance. Water proof luminous powders are engineered to excel in both indoor and outdoor environments, maintaining stable and reliable performance throughout the year. When paired with appropriate protective measures—such as encapsulation within a suitable binder (e.g., a UV-resistant clear coating or epoxy resin)—these luminous powders can continue to emit light in outdoor settings for a duration of 5 to 8 years.

For applications involving prolonged exposure to direct sunlight or potential contact with water, we invite you to contact our technical team. We will be pleased to assist you in selecting the specific grade of luminous powder and coating solution best suited to the unique requirements of your outdoor project.