Moisture Protection for Circuit Boards
In printed circuit boards and mounted components used in various electrical devices, the presence of the following substances or phenomena can cause issues such as short circuits, open circuits, and leakage, which may lead to device malfunctions and failures:
★ Condensation
★ Immersion in water
★ Metal migration
★ Acidic substances such as hydrogen sulfide and hydrogen chloride
★ Lithium battery electrolyte

A resin film created by a coating agent can protect circuits from these substances and phenomena, thereby preventing failures.
Room-temperature fluoropolymer coatings are widely used in various fields and applications due to their high moisture resistance and superior additional properties. In today’s world, where mechanical and digital technologies deeply permeate daily life, room-temperature fluoropolymer coatings have become an essential factor in enhancing product durability and quality.

Circuit Board Protection in Mobile Devices such as Smartphones
The primary application of room-temperature fluoropolymer coatings is the protection of circuit boards in mobile devices.
Lightweight design is a key performance feature in smartphones and other mobile devices. Room-temperature fluoropolymer coatings are effective even in extremely thin films, just a few microns thick, making them the ideal choice in situations where added weight is undesirable.
Moreover, mobile devices are equipped with high-performance lithium batteries that charge quickly and operate for long periods. When dropped or subjected to impact, these devices may leak battery electrolyte, which is highly acidic and can cause short circuits on the circuit board, potentially resulting in fires. Fluoropolymer coatings offer the best resistance to battery electrolyte among resin-based coatings. Even in the event of a leak, they can protect the circuit board and help prevent fire accidents.
For the same reasons (lightweight and resistance to electrolyte), our fluoropolymer coating “Fluoro Surf” is also used on circuit boards in the latest aircraft.

Circuit Board Protection in Outdoor Equipment
Outdoor equipment such as air conditioners and water heaters are exposed to the elements, making their parts and circuit boards prone to aging. By applying room-temperature fluoropolymer coatings to the circuit boards of outdoor devices, you can enjoy the same moisture protection benefits as with mobile devices. Equipment directly exposed to wind and rain requires especially careful protection.
Since these devices often operate in environments prone to dirt and grime, room-temperature fluoropolymer coatings not only provide moisture resistance but also offer water/oil repellency and anti-fouling properties, ensuring reliable circuit board protection. Similarly, they are ideal for use in outdoor equipment like LED signboards or traffic signals.

Moisture and humidity are major causes of circuit board degradation. For this reason, moisture-proof coatings are widely used in printed circuit boards across many industries. When considering the use of moisture-proof materials, it is important to select the appropriate product based on the specific application and usage environment.
In particular, room-temperature fluoropolymer coatings offer not only excellent moisture resistance but also a range of additional features, making them suitable for various fields. When introducing moisture-proof coatings, attention should also be given to whether the target product requires functions beyond moisture resistance.