Acrylic Conformal Coating | Easy-to-Apply, Re-workable PCBA Protection

Acrylic conformal coating (AR coating) is a versatile, fast-drying protective film widely used for printed circuit board assemblies requiring moisture resistance, dielectric insulation, and easy reworkability. Unlike hard epoxies or high-temperature silicones, acrylic coatings are thermoplastic — meaning they can be softened with solvents for straightforward repair and component replacement.

What Is Acrylic Conformal Coating?

Acrylic conformal coating (also known as conformal coating acrylic) is a clear, flexible polymer film applied to printed circuit boards to protect against moisture, dust, corrosion, and mild chemical exposure. It is typically supplied as a solvent-based system that dries at room temperature or with mild heat, leaving a transparent, resilient layer.

At Tengxinjie, we provide professional acrylic coating PCB services using automated selective spray, manual spray, or dip-coating methods. Our acrylic PCBA protection process is fully compliant with IPC-CC-830, RoHS, and UL standards, making it a trusted choice for cost-effective, high-volume electronics manufacturing.

Acrylic Conformal Coating

Key Benefits of Acrylic Conformal Coating

🔄 Easily Reworkable & Repairable

The thermoplastic nature of acrylic conformal coating means it can be softened and removed using common solvents (such as isopropyl alcohol or proprietary strippers) without damaging the board or components. This makes field repairs, component replacement, and rework significantly faster and more cost-effective compared to epoxies or parylene.

💧 Excellent Moisture & Humidity Resistance

Conformal coating acrylic provides an effective barrier against moisture ingress, preventing corrosion, dendritic growth, and electrical leakage in humid or condensing environments. It is particularly effective at protecting boards in consumer electronics, lighting, and HVAC applications.

☀️ UV & Oxidation Stability

Acrylic coatings offer excellent resistance to UV degradation and yellowing over time, making them ideal for applications exposed to sunlight or indoor lighting (e.g., LED drivers, outdoor displays, signage).

💨 Fast Drying & Simple Application

Acrylic coating PCB dries quickly at room temperature (typically 10-30 minutes tack-free) or can be force-dried in minutes with mild heat. This enables fast throughput and minimal production delays.

How Does Acrylic Compare to Other Conformal Coatings?

Acrylic vs. Epoxy

Acrylic conformal coating is much easier to rework and recoat than epoxy. Epoxy is harder and more chemical-resistant but is thermoset and cannot be easily removed. Choose acrylic for assemblies requiring field service, repair, or component replacement. Choose epoxy for permanent, harsh-chemical environments.

Acrylic vs. Silicone

Silicone offers superior thermal stability (-40°C to +200°C) and flexibility but is more expensive and can be difficult to remove completely. Conformal coating acrylic is more cost-effective, easier to rework, and provides adequate protection for most consumer and industrial applications with normal temperature ranges.

Acrylic vs. Urethane

Urethane provides better chemical and abrasion resistance but is more difficult to rework and may yellow under UV. Acrylic PCBA protection is preferred for UV-exposed applications (LEDs, outdoor) and designs requiring future rework.

Acrylic vs. Parylene

Parylene is ultra-thin, pinhole-free, and biocompatible — ideal for medical and aerospace. Acrylic coating PCB is significantly less expensive, easier to apply, and reworkable, but thicker and not recommended for implantable medical devices or high-reliability aerospace.

Acrylic Conformal Coating Technical Specifications

Parameter	Acrylic Coating Capability
Coating Type	Solvent-based acrylic (AR) — various viscosities available
Application Methods	Automated selective spray, manual aerosol spray, dip coating, brush
Typical Thickness	25 – 75 µm (1 – 3 mils) — multiple coats possible
Curing Method	Air dry at room temperature (10-30 min tack-free, 24hr full cure) or forced warm air (5-15 min at 60°C)
Temperature Range	-40°C to +125°C (intermittent)
Dielectric Strength	1,500 – 2,500 V/mil (depending on thickness)
Water Absorption	< 0.3% (24-hour immersion)
UV Stability	Excellent — minimal yellowing after extended exposure
Compliance	IPC-CC-830, RoHS, UL 746E (specific grades)
Color	Clear, fluorescent (for UV inspection), or custom tint

Typical Applications for Acrylic Conformal Coating

📱 Consumer Electronics

Smartphones, tablets, wearables, smart home devices, and appliances requiring moisture protection and reworkability for cost-effective manufacturing.

💡 LED Lighting Modules & Drivers

Acrylic conformal coating provides UV-stable, moisture-resistant protection for LED boards, drivers, and lighting controls exposed to indoor or outdoor environments.

🏠 HVAC & Appliance Controls

Control boards for air conditioners, refrigerators, washing machines, and thermostats benefit from acrylic’s humidity resistance and repairability.

📡 Telecommunications

Router, switch, and base station boards requiring reliable protection against dust, humidity, and mild chemical exposure.

⚡ Power Supplies & Chargers

AC-DC converters, battery chargers, and power adapters where cost-effective moisture and corrosion resistance is needed.

🖨️ Office Equipment & Peripherals

Printer, scanner, and copier control boards exposed to paper dust and moderate humidity.

Why Choose Tengxinjie for Acrylic Conformal Coating?

✅ High-Volume & Prototype Capability

From single-board prototypes to millions of units, our automated selective spray lines and batch dip systems deliver consistent acrylic coating PCB quality at any scale.

🔬 Fluorescent Additives for Inspection

We offer coatings with fluorescent tracers for easy UV inspection, ensuring every board receives complete, uniform coverage — no missed areas or pinholes.

🧪 Masking & Selective Coating Expertise

We provide precision masking for connectors, test points, switches, and other keep-out zones, with fixturing designed for your specific board layout.

📋 Full Quality Documentation

Our processes are IPC-CC-830 compliant. We provide thickness measurements, UV inspection records, and CoC for every batch.

Ready to Protect Your PCBA with Acrylic Conformal Coating?

Upload your files and coating specifications. Our engineering team will review your design and provide a detailed quote within 12-24 hours.

Request a Quote →

✔ NDA Available ✔ ISO 9001:2015 ✔ IPC-CC-830 Compliant ✔ Fast Turnaround

Frequently Asked Questions (FAQs)

1. What is acrylic conformal coating?

Acrylic conformal coating (AR coating) is a transparent, thermoplastic polymer film applied to printed circuit boards to protect against moisture, dust, corrosion, and mild chemical exposure. It dries quickly, is easy to rework, and provides reliable dielectric insulation.

2. How does conformal coating acrylic compare to silicone or epoxy?

Conformal coating acrylic is significantly easier to rework and recoat than epoxy or silicone. It offers good moisture resistance and UV stability at a lower cost. However, it has lower thermal stability (max 125°C) than silicone and lower chemical resistance than epoxy. Choose acrylic for cost-effective, reworkable protection in consumer, lighting, and general industrial applications.

3. Is acrylic coating PCB removable for component replacement?

Yes. Acrylic coating PCB is thermoplastic and can be dissolved using common solvents such as isopropyl alcohol, glycol ethers, or proprietary conformal coating strippers. This allows non-destructive removal for component replacement, rework, or recoat — a major advantage over epoxy or parylene.

4. How is acrylic conformal coating applied?

We apply acrylic conformal coating using automated selective spray equipment for precision and high volume, manual spray for prototypes, or dip coating for simple geometries. The coating air-dries at room temperature (10-30 minutes tack-free) or can be force-dried in minutes at 60°C.

5. What thickness should acrylic conformal coating be?

Typical thickness for acrylic PCBA protection ranges from 25 to 75 microns (1 to 3 mils) per coat. For most applications, a single coat is sufficient. Multiple thinner coats are preferred over one thick coat to avoid cracking and ensure consistent drying.

6. Is acrylic conformal coating UV stable?

Yes. Acrylic conformal coating offers excellent resistance to UV degradation and yellowing over time, making it suitable for applications exposed to sunlight or indoor lighting (e.g., LED drivers, outdoor signage, solar equipment).

7. What standards apply to acrylic conformal coating?

Our acrylic conformal coating processes comply with IPC-CC-830 (qualification and performance), RoHS, and UL 746E (flammability) for applicable grades. We can provide full documentation including Certificates of Conformance (CoC) and material traceability.

8. Can acrylic conformal coating be applied selectively?

Yes. Using automated selective spray equipment, we apply conformal coating acrylic only to designated areas, leaving connectors, test points, switches, and other keep-out zones uncoated. This reduces masking costs and improves reliability for critical interfaces.

9. What is the temperature range for acrylic conformal coating?

Standard acrylic coating PCB grades are rated for continuous operation from -40°C to +125°C. For applications exceeding 125°C, silicone or specialized high-temperature coatings are recommended.

10. How do I get a quote for acrylic conformal coating?

To receive a quote for acrylic conformal coating, please upload your Gerber files, assembly drawings, or sample boards. Indicate any keep-out areas requiring masking, and specify any thickness or cure speed requirements. Our engineering team will review and provide a detailed quotation within 12-24 hours.