What are the differences between applying glue and coating with a three-in-one protective coating?

What is Conformal Coating?

Conformal coating is a material used to protect the surface of electronic devices. It is usually applied in liquid form to circuit boards, chips, and other electronic components, forming a protective film. Its primary purpose is to protect electronic components from moisture, dust, chemicals, and mechanical impact, thereby enhancing the durability and stability of the devices. Conformal coatings have good insulation properties and temperature resistance. Common types include silicone, epoxy resin, and polyurethane, and they are widely used in fields such as LED lighting, automotive electronics, home appliances, and industrial equipment.

What is Three-Proof Paint?

Three-proof paint is a specialized coating material used to protect circuit boards and electronic components, with three main protective features: moisture-proofing, salt-spray resistance, and mold prevention—hence the name “three-proof paint.” It effectively blocks moisture, salt, and mold in the environment, preventing corrosion and damage to electronic devices in harsh conditions, thus extending their lifespan and stability.

Three-proof paint is commonly applied in electronic products that require environmental resilience, such as automotive electronics, aerospace equipment, outdoor lighting, and industrial devices. Common materials for three-proof paint include acrylic, polyurethane, and organic silicone, which offer good insulation and temperature resistance.

Difference Between Conformal Coating and Three-Proof Paint

Conformal coating and three-proof paint are both used to protect electronic components, but they have some differences in composition, function, and application:

1. Primary Function:

• Conformal Coating: Primarily used to protect circuit boards and components from moisture, dust, and chemicals, as well as to enhance impact resistance. The focus is more on physical protection and structural support, making it suitable for encapsulation and reinforcement of components.

• Three-Proof Paint: Mainly used for moisture-proofing, salt spray resistance, and mold prevention, protecting circuit boards from environmental corrosion. Its primary role is to provide environmental protection, especially in harsh operating conditions.

2. Material Composition:

• Conformal Coating: Common materials include silicone, epoxy resin, and polyurethane, often featuring good flexibility, transparency, or heat resistance. It’s ideal for applications requiring light transmittance and impact resistance.

• Three-Proof Paint: Typically made from acrylic, polyurethane, and organic silicone, with formulations specifically designed for moisture, salt spray, and mold resistance.

3. Coating Characteristics:

• Conformal Coating: Generally, the coating is thicker with a certain degree of flexibility and adhesive strength, providing strong mechanical protection.

• Three-Proof Paint: The coating is thinner and highly transparent, mainly for environmental corrosion protection, making it easier for inspection and maintenance.

4. Application Scenarios:

• Conformal Coating: Suitable for LED lighting, automotive electronics, and industrial equipment where mechanical strength and thermal stability are required.

• Three-Proof Paint: Widely used in outdoor electronics, marine equipment, and aerospace applications where long-term environmental resistance is needed.

In summary, conformal coating focuses more on physical protection and structural support, while three-proof paint is primarily for environmental protection. The choice depends on specific requirements.