HumiSeal® 1A33 Aerosol Spray Conformal Coating for PCB Protection_Products News_News | 2-Part Acrylic Adhesive, Structural Acrylics, UV Resin, Cyanoacrylate manufacturer│TEX YEAR Since 1976

Printed circuit boards are essential to modern electronic devices, but they are often exposed to moisture, contamination, corrosion, and harsh operating conditions. To ensure long-term reliability, manufacturers need a conformal coating that provides strong protection, easy application, and dependable inspection capability.

HumiSeal® 1A33 Aerosol Spray Conformal Coating is a single-component polyurethane conformal coating designed for general printed circuit board applications. With its convenient aerosol spray format, UV fluorescence, and recognized industry qualifications, HumiSeal® 1A33 provides an effective solution for protecting PCB assemblies across automotive, military, renewable energy, industrial, and general electronic applications.

What Is HumiSeal® 1A33 Aerosol Spray Conformal Coating?

HumiSeal® 1A33, product code 70662, is a single-component urethane conformal coating suitable for printed circuit board protection. It is formulated to protect electronic assemblies from environmental stressors such as humidity, salt spray, contamination, corrosion, and other harsh operating conditions.

One of its key advantages is that it fluoresces under UV light, allowing coated areas to be easily inspected during quality control. This makes it especially useful for manufacturers that require consistent coating coverage and reliable inspection during production.

The product contains no free isocyanates, offering a safer formulation while still delivering durable polyurethane protection for electronic components.

Why Use Polyurethane Conformal Coating on PCBs?

Polyurethane conformal coatings are widely used when electronic assemblies require strong environmental resistance and long-term durability. Compared with general protective coatings, urethane conformal coatings offer excellent protection against moisture, corrosion, chemicals, and mechanical stress.

For PCB assemblies used in demanding environments, a high-performance conformal coating can help prevent failures caused by humidity, contamination, salt spray, or corrosive exposure. HumiSeal® 1A33 helps protect sensitive electronic circuits while supporting operational reliability and extended product service life.

Key Features of HumiSeal® 1A33

HumiSeal® 1A33 is designed to simplify application while delivering reliable PCB protection. Its main features include:

• Single-component formulation for easier handling and simplified application
• Polyurethane conformal coating technology for durable environmental protection
• UV fluorescence for efficient inspection and quality control
• No free isocyanates, supporting safer use and handling
• Fast drying time of approximately 10 minutes to improve process efficiency
• Industry qualifications and compliance, including MIL-I-46058C, IPC-CC-830B, RoHS Directive 2011/65/EC, and UL recognition under File Number E105698

These features make HumiSeal® 1A33 a strong choice for manufacturers seeking a practical and reliable PCB conformal coating solution.

Applications Across Demanding Industries

HumiSeal® 1A33 Aerosol Spray Conformal Coating is suitable for a broad range of printed circuit board applications where environmental protection and quality control are essential.

General PCB protection

HumiSeal® 1A33 is suitable for general printed circuit board applications, helping protect assemblies from moisture, contamination, and environmental stress.

Automotive electronics

Automotive electronic components may be used in both in-cabin and exterior environments. These applications require protection against humidity, vibration, contamination, and temperature changes. HumiSeal® 1A33 supports reliable performance for automotive PCB assemblies.

Military equipment

Military electronics often operate in demanding and unpredictable conditions. With durable urethane protection and recognized industry qualifications, HumiSeal® 1A33 is suitable for applications requiring long-term reliability and robust performance.

Renewable energy systems

Solar, wind, and energy storage systems rely on electronic controls that may be exposed to humidity, outdoor conditions, and environmental stress. HumiSeal® 1A33 helps enhance the reliability of PCB assemblies used in renewable energy equipment.

Industrial controls

Industrial control boards are often exposed to high humidity, salt spray, corrosive environments, dust, and chemical contamination. A polyurethane conformal coating provides an added layer of protection to support stable operation in harsh industrial settings.

Benefits of HumiSeal® 1A33 for PCB Protection

Selecting the right conformal coating can improve product reliability, reduce maintenance costs, and extend the service life of electronic assemblies. HumiSeal® 1A33 offers several important benefits:

1. Enhanced electronic reliability
The coating helps protect PCB assemblies from moisture, corrosion, contamination, and environmental stress, reducing the risk of performance failure.

2. Easy inspection with UV fluorescence
Because HumiSeal® 1A33 fluoresces under UV light, manufacturers can easily verify coating coverage during inspection, improving quality control and process consistency.

3. Safer non-isocyanate formulation
The product contains no free isocyanates, helping reduce potential handling concerns while maintaining strong polyurethane protection.

4. Fast drying for improved productivity
With a drying time of approximately 10 minutes, HumiSeal® 1A33 helps shorten processing time and improve production efficiency.

5. Strong compliance profile
HumiSeal® 1A33 meets important industry requirements, including MIL-I-46058C, IPC-CC-830B, RoHS Directive 2011/65/EC, and UL recognition, making it suitable for regulated and reliability-focused applications.

6. Long service life for critical components
By protecting electronic assemblies from harsh conditions, HumiSeal® 1A33 helps extend product life and reduce replacement or maintenance costs.

Product Specifications

Why Choose HumiSeal® 1A33 Aerosol Spray Conformal Coating?

For manufacturers and engineers, PCB protection is essential to ensuring long-term electronic reliability. HumiSeal® 1A33 provides a practical combination of polyurethane durability, aerosol spray convenience, UV inspection capability, and recognized compliance.

Its single-component formulation simplifies application, while its fast drying time supports efficient production. The coating’s UV fluorescence makes inspection easier, helping manufacturers confirm coverage and maintain consistent quality standards.

Whether used in automotive electronics, military systems, renewable energy applications, industrial controls, or general PCB assemblies, HumiSeal® 1A33 delivers reliable protection for critical electronic components.

If you are interested in HumiSeal 1A33 or have any related inquiries, please feel free to contact us anytime.