Conformal Coating Service

We provide professional conformal coating services (Acrylic / PU / Silicone / UV) to meet the long-term, stable operation requirements of industrial, Automotivo, and communication applications.

What Is PCB Conformal Coating?

PCB conformal coating is a thin polymer film applied to the surface of a printed circuit board (PCB), typically ranging from 25 μm to 150 μm in thickness. It tightly conforms to the board and its components, forming a “custom-fit” protective layer—like an invisible armor that shields delicate circuitry from moisture, corrosion, and wear.

This coating is not an optional add-on but a core safeguard for electrical reliability. Whether in humid outdoor environments, oil-filled industrial workshops, or vibration-intense automotive engine bays, it effectively isolates environmental threats, preventing short circuits, component degradation, and other failures—significantly extending the product’s service life.

Core Advantages: Why Your PCB Must Have Conformal Coating

Comprehensive Environmental Protection
Effectively shields against moisture, condensation, salt spray, pó, and chemical corrosives. Provides stable protection even in harsh environments such as maritime climates or industrial pollution zones.

Enhanced Electrical Performance
Improves circuit insulation, increases dielectric withstand voltage between conductors, and reduces leakage risks, ensuring stable high-frequency signal transmission.

Strengthened Mechanical Protection
Offers mechanical support to components, alleviates solder joint fatigue, and resists vibration, shock, and other physical damage—ideal for mobile devices, automotive applications, and other dynamic scenarios.

Supports Lean Manufacturing
Compatible with spraying, brushing, and dipping application methods. Some materials cure quickly at room temperature for high-volume production, while certain coatings allow easy rework and repair, reducing manufacturing costs.

Why choose LST

Automated Coating Equipment

Utilizes Nordson / Asymtek automated spray systems, achieving coating uniformity within ±5% to ensure high consistency.

Precise Thickness Control

Tailored to PCB application requirements:
●Standard thickness: 20–50 μm
●Thick coating: 50–150 μm
●Special protective coating: ≥200 μm

Rigorous Inspection Processes

●UV lamp coverage inspection
●Coating thickness measurement
●Visual microscopic examination
●Temperature and humidity cycling tests
●Optional salt spray testing

Multiple Certifications

●IPC-CC-830 standard
●RoHS / REACH compliance
●Automotive-grade AEC-Q100

Our Conformal Coating Processes

Spray Coating (Selective Coating):
Automated selective coating allows precise control over the coverage area, ensuring that only targeted regions receive the coating. Ideal for complex PCBs where certain components or areas must remain uncoated.

Dip Coating:
Suitable for PCBs with regular structures, dip coating ensures uniform coverage across the entire board. It is highly efficient for high-volume production while maintaining consistent quality.

Brush Coating (Manual Coating):
Provides targeted coating for small batches or specific areas that require additional protection. Perfect for prototypes, retrabalho, or areas that automated equipment cannot reach.

Fully Automated Conformal Coating Line (Auto Coating Line):
Designed for large-scale industrial orders, this fully automated line combines speed, precisão, and consistency. It supports high-volume production while ensuring uniform coating quality across every PCB, meeting industrial and automotive standards.

Main Product Types: Precisely Match Your Application Scenarios

Different industries and environments have varied requirements for PCB protection. We provide five major types of mainstream conformal coating materials, and there is always one that suits your products:

Coating Type	Core Characteristics	Cenários de aplicação	Reference Advantages
Acrylic	Fast curing, high transparency, easy rework, and good moisture and mildew resistance	Eletrônica de consumo, eletrodomésticos, conventional industrial control boards	Low cost, suitable for mass production
Epoxy	High hardness, wear and impact resistance, strong chemical corrosion resistance	Módulos de potência, relés, motor control boards	Good structural stability and high protection strength
Polyurethane	Excellent barrier property, moderate toughness, e alta confiabilidade	Communication equipment, military electronics, telecommunications control boards	Cost-effective, suitable for medium protection requirements
Silicone	High temperature resistance (above 150℃), fungus resistance, and good flexibility	Automotive engine compartments, aeroespacial, energy and power	Strong adaptability to extreme environments and excellent adhesion
Urethane	Low temperature resistance, good water and oxygen barrier properties, and long service life	Cold chain logistics equipment, intelligent instruments, battery protection systems	Suitable for cold regions and low-corrosion environments

Applicable Industries

Our conformal coating solutions are widely used in electronic devices that demand high reliability and long-term stability, incluindo:

Eletrônica automotiva

Industrial control system

5G communication devices

Eletrônica de consumo

Frequently Asked Questions

Q1: How do I choose the most suitable conformal coating material?
UM: Selection should consider three main factors—environment (use silicone for high temperatures, polyurethane for high humidity), maintenance requirements (acrylic for frequent rework), and cost budget (acrylic preferred for high-volume consumer products). We also offer a free application assessment service to help you choose.

Q2: Will the coating affect PCB heat dissipation or testing?
UM: Não. Our coatings are applied at a micron-level thickness, and some products include thermally conductive components, ensuring heat dissipation is not affected. Transparent formulations allow clear visibility of components, supporting online inspection and subsequent soldering operations.

Q3: Are your coatings environmentally compliant?
UM: Sim. All products comply with the EU RoHS directive. Most are water-based, environmentally friendly formulations with zero volatile organic compounds (VOCs), ensuring safe production and environmental protection.