What are the main types of PCB conformal coating per IPC-CC-830C?

IPC-CC-830C recognizes 8 coating families. The four types used in the vast majority of programs are: Acrylic (AR) — fastest-drying, easiest rework, lowest cost; Polyurethane (UR) — excellent chemical and abrasion resistance, dominant in automotive and industrial applications; Silicone (SR) — widest operating temperature range up to +200°C and beyond, lowest elastic modulus, preferred for high-temperature and wide thermal cycling applications; and Epoxy (ER) — highest chemical resistance, maximum protection, effectively non-reworkable once cured.

Which conformal coating is best for automotive electronics?

For automotive cabin electronics, Polyurethane (UR) is generally recommended due to its superior moisture resistance and chemical resistance to fuels and oils. For underhood or EV power electronics subjected to wide temperature ranges and demanding thermal cycling on populated assemblies, Silicone (SR) or Polyurethane (UR) are preferred, as silicone's extremely low elastic modulus minimizes stress on component leads during real-world thermal cycling.

Does IPC-CC-830C cover salt spray testing for marine applications?

No. IPC-CC-830C does not include a salt spray test. Marine and offshore applications require additional qualification per IEC 60068-2-11 (steady-state salt mist, 5% NaCl) or IEC 60068-2-52 (cyclic salt mist), with bias voltage applied during testing to model real operating conditions. IPC-CC-830C qualification alone is insufficient for marine deployment.

Which conformal coating is easiest to rework?

Acrylic (AR) conformal coatings are the easiest to rework. They dissolve readily in ketone solvents such as acetone or MEK, and can often be soldered through without full removal. Silicone (SR) requires swelling solvents or mechanical removal. Polyurethane (UR) requires prolonged soaking in strong strippers plus agitation. Epoxy (ER) is effectively non-reworkable — only mechanical abrasion or localized thermal removal are possible, with high risk of board damage.

Do all IPC-CC-830C qualified conformal coatings pass thermal shock testing?

Yes. The IPC-CC-830C thermal shock test (50 cycles, −65°C to +125°C on a flat test board) is a baseline qualification threshold that all four chemistry types — AR, UR, SR, and ER — pass when IPC-qualified. This test does not differentiate between chemistries. The real differentiators for thermal applications are the sustained operating temperature range (Silicone exceeds +200°C; Acrylic and Polyurethane are limited to +125°C) and behavior on populated assemblies under real-world extreme cycling, where Silicone's low elastic modulus provides superior protection for component leads and solder joints.

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PCB Conformal Coating Selection Guide

This PCB conformal coating selection guide covers the four foundational chemistries recognized by IPC-CC-830C — Acrylic (AR), Polyurethane (UR), Silicone (SR), and Epoxy (ER) — with their key properties, application methods, IPC qualification standards, and industry-specific recommendations. All technical data is sourced from manufacturer data sheets and IPC standards.

1. The 4 Coating Types 2. Property Comparison 3. Key Properties 4. Application Methods 5. IPC Standards 6. By Industry 7. Products 8. Checklist

PCB conformal coating applied and inspected under UV light showing fluorescent coverage — Conformal coating fluoresces under UV light, enabling complete coverage inspection per IPC-A-610.

1. The 4 Core Conformal Coating Types: IPC-CC-830C Classification

IPC-CC-830C is the globally accepted qualification standard for conformal coatings on printed wiring assemblies. It classifies coatings by their cured polymer chemistry — which is precisely what determines a coating’s protection profile, processing requirements, and reworkability. This makes IPC-CC-830C type codes (AR, UR, SR, ER…) the most useful starting framework for material selection: each code maps directly to a distinct set of performance trade-offs, and IPC-CC-830C qualification is the baseline document that procurement and quality teams reference in most professional specifications.

IPC-CC-830C currently recognizes 8 coating families. This guide focuses on 4 — here is why:

Code	Chemistry	Why in / out of scope
AR	Acrylic	✓ In scope — the most widely used, lowest-cost, most reworkable chemistry
UR	Urethane / Polyurethane	✓ In scope — dominant in industrial and automotive applications
SR	Silicone	✓ In scope — the only chemistry rated to +200°C; essential for high-temperature applications
ER	Epoxy	✓ In scope — maximum protection against chemicals and abrasion; used when repairability is not required
UV	UV-cure	UV is a cure mechanism, not a distinct polymer chemistry. UV-cure coatings are typically acrylic- or urethane-based resins — covered under AR and UR. See Section 4.5 for application notes.
XY	Parylene	Applied exclusively by Chemical Vapor Deposition (CVD) in a dedicated vacuum chamber — not compatible with standard liquid coating equipment. Requires a completely separate process and capital investment. Out of scope for typical production environments.
UT	Ultra-Thin	A thickness category (≤12.5 µm), not a distinct chemistry. Added in Rev C (2018). UT coatings use AR, SR, or other base chemistries applied at nano-scale thickness — a niche specification for ultra-compact or weight-sensitive designs.
SC	Styrenic Copolymer	Added in Rev C (2018). Offers higher flexibility and slightly higher operating temperature than standard AR/UR. Limited commercial availability; niche adoption. Not yet widely stocked or specified in standard industrial programs.

Source: IPC-CC-830C (Rev C, 2018); HumiSeal IPC-CC-830B Qualification Guide (Chase Corporation)

IPC-CC-830C conformal coating types: Acrylic AR, Polyurethane UR, Silicone SR, Epoxy ER comparison — IPC-CC-830C classifies 8 conformal coating families. AR, UR, SR, and ER account for the vast majority of production use worldwide. Source: IPC-CC-830C Standard.

The 4 in-scope chemistries — AR, UR, SR, ER — cover the decision space for the overwhelming majority of PCB conformal coating programs. Understanding their differences is the foundation of any sound material selection process.

1.1 Acrylic (AR) Conformal Coating

IPC-CC-830C designation: AR | Cure: Solvent evaporation

Acrylic coatings are thermoplastic materials dissolved in carrier solvents. Once applied, the solvent evaporates to leave a flexible, transparent film — the fastest-drying chemistry available.

✓ Strengths

Fastest dry time — boards handleable in 15–30 min
Easiest rework: dissolves in ketones (acetone, MEK); can be soldered through without full removal
Excellent dielectric properties and flexibility
Lowest material cost of the four chemistries
UV-fluorescent for straightforward inspection

✗ Limitations

Poor chemical and solvent resistance — attacked by the same solvents used to remove it
Lower moisture vapor barrier vs. polyurethane and epoxy
Not suitable for fuel, hydraulic fluid, or aggressive industrial cleaning agents

Best for: Consumer electronics, indoor industrial equipment, white goods, telecommunications, any application where repairability is a priority.

Acrylic conformal coating usages

Source: Internet

The Complete Guide to Acrylic Adhesives →

1.2 Polyurethane (UR) Conformal Coating

IPC-CC-830C designation: UR | Cure: Moisture (1K) or Chemical reaction (2K)

Polyurethane coatings provide a significant step up in chemical and abrasion resistance over acrylics, while remaining more reworkable than epoxies. Modern isocyanate-free formulations — including the HumiSeal 1A series — eliminate handling hazards and are safe for standard production environments.

✓ Strengths

Superior moisture and humidity resistance
Excellent chemical resistance: fuels, oils, mild solvents, cleaning agents
Outstanding abrasion resistance
Strong adhesion at low temperatures
Available in aerosol, liquid (dip/spray), and thixotropic gel forms

✗ Limitations

Longer cure time: 30 days at RT; heat cure recommended (30 h @ 76°C)
More difficult to rework — prolonged solvent soaking plus agitation required
Tg of common grades near ambient (~26°C for HumiSeal 1A33, per TDS) — coating transitions between glassy and rubbery states near room temperature; a material property to factor into mechanical design, not a thermal cycling disqualifier (UR grades pass IPC-CC-830C and MIL-I-46058C thermal shock testing)

Best for: Automotive electronics, industrial controls, power supplies, marine electronics, applications requiring chemical splash resistance.

Polyurethane (UR) Conformal Coating for Automotive

Source: Internet

Epoxy, Silicone, or Polyurethane — Optimal Materials for EV Sensors Encapsulation →

1.3 Silicone (SR) Conformal Coating

IPC-CC-830C designation: SR | Cure: Moisture (RTV) / Heat / UV-hybrid

Silicone coatings are built on a Si–O polymer backbone — the source of their unmatched thermal stability and extreme flexibility across the widest temperature range of any conformal coating chemistry.

✓ Strengths

Widest sustained operating temp. range: typically −65°C to +200°C and beyond
Extremely low elastic modulus — minimal stress on fine-pitch SMDs and BGA packages during real-world thermal cycling
Excellent moisture and humidity resistance
UV-fluorescent formulations available for inspection

✗ Limitations

Poor resistance to petroleum oils, fuels, and most organic solvents
Difficult to rework once cured
Contamination risk: airborne silicone permanently prevents adhesion of other coatings — strict production segregation is mandatory
Higher material cost

Best for: Aerospace, defense, LED driver boards, EV power converters, engine control units, any high-temperature or wide thermal cycling application.

Conformal Coating for Electronics

Source: Internet

Silicone Adhesives – Complete Guide to Properties, Applications and Trends →

1.4 Epoxy (ER) Conformal Coating

IPC-CC-830C designation: ER | Cure: Two-component chemical crosslinking

Epoxy coatings deliver the highest protection level of the four core chemistries. The dense, highly cross-linked polymer network resists chemicals that defeat acrylic and polyurethane — at the trade-off of being effectively non-reworkable.

✓ Strengths

Highest chemical resistance: acids, alkalis, fuels, solvents, industrial cleaners
Superior abrasion resistance
Excellent moisture barrier
Mechanically reinforces solder joints against shock and vibration

✗ Limitations

Very difficult to rework — mechanical abrasion or localized thermal removal; high board-damage risk
2-part system requires precise mixing ratio control
Rigid film can crack under repeated thermal cycling (CTE mismatch) — validate carefully for high-cycle applications
Longer processing time

Best for: Military electronics, chemical processing equipment, offshore/subsea electronics, harsh industrial environments where long-term protection outweighs repairability.

Epoxy (ER) Conformal Coating

Source: Internet

Epoxy Adhesive and Industrial Epoxy Adhesive – Complete Knowledge Guide →

2. Side-by-Side Comparison: Key Properties at a Glance

Property	Acrylic (AR)	Polyurethane (UR)	Silicone (SR)	Epoxy (ER)
IPC-CC-830C Code	AR	UR	SR	ER
Cure Mechanism	Solvent evaporation	Moisture / Heat	Moisture / Heat / UV	2-part chemical
Moisture Resistance	Good	Excellent	Excellent	Excellent
Chemical Resistance	Poor	Good	Moderate	Excellent
Sustained Operating Temp.	up to +125°C	up to +125°C	up to +200°C+	up to +150°C
Abrasion Resistance	Moderate	Excellent	Low	Excellent
Reworkability	Easiest	Difficult	Moderate	Very Difficult
Thickness (IPC-A-610)	25–75 µm	25–75 µm	50–200 µm	25–75 µm
Relative Cost	Lowest	Medium	Higher	Medium–High
Best For	General-purpose, repairable assemblies	Industrial, automotive, chemical resistance	High-temp, wide thermal cycling	Max protection, no rework needed

Sources: IPC-CC-830C Standard; HumiSeal Technical Data Sheets (Chase Corporation); MG Chemicals Conformal Coating Guidelines. Thickness values per IPC-CC-830C test vehicle requirements.

3. Critical Properties to Evaluate Your PCB Conformal Coating

3.1 Moisture & Humidity Resistance

Moisture is the primary driver of conformal coating field failures. Water vapor diffuses through the film, condenses on metal surfaces, and enables ionic migration — leading to corrosion, leakage current, and dendrite growth (electrochemical migration).

Key test per IPC-CC-830C — Moisture and Insulation Resistance (MIR): coated IPC-B-25A test board at 85°C / 85% RH for 168 hours → minimum 10⁹ Ω required to pass.

IPC-B-25A test board used for Moisture and Insulation Resistance testing in conformal coating qualification — IPC-B-25A comb-pattern test board after 85°C / 85% RH / 168 h Moisture and Insulation Resistance test. Minimum pass: 10⁹ Ω.

Selection rule:

Tropical climates / outdoor enclosures: specify Polyurethane, Silicone, or Epoxy. Acrylic is acceptable for controlled indoor environments only.
Marine / offshore applications: IPC-CC-830C’s humidity test (85°C / 85% RH) does not cover the salt spray environment. Marine programs additionally require qualification per IEC 60068-2-11 (salt mist, steady-state, 5% NaCl) or IEC 60068-2-52 (cyclic salt mist) — with bias voltage applied during testing to model real operating conditions. IPC-CC-830C qualification alone is insufficient for marine deployment.

Important Properties When Choosing Conformal Coating Materials →

3.2 Operating Temperature Range

An important clarification: the IPC-CC-830C thermal shock test (50 cycles, −65°C to +125°C, on flat test boards) is a baseline qualification requirement — virtually all IPC-qualified coatings pass it, and it does not differentiate between AR, UR, SR, and ER. Real-world performance on populated assemblies under extreme or prolonged thermal cycling is a separate matter entirely and must be validated independently.

The properties that actually determine thermal suitability in your application are:

Property	Acrylic (AR)	Polyurethane (UR) HumiSeal 1A33 ref.	Silicone (SR)	Epoxy (ER)
Sustained Max. Operating Temp.	+125°C	+125°C	+200°C+	+150°C
Glass Transition Temp. (Tg)	Varies by grade	~26°C (DSC) — note: near ambient	Very low — remains flexible throughout range	High
CTE / Modulus behavior under cycling	Moderate	CTE 193 ppm/°C; stiffer near Tg	High CTE but extremely low modulus — absorbs stress rather than transmitting it to components	High CTE + high modulus — cracking risk under aggressive cycling
IPC-CC-830C Thermal Shock (baseline)	All 4 chemistries pass: 50 cycles, −65°C to +125°C on flat test board. This test does not differentiate between chemistries — it is a minimum qualification threshold only.

Reference: HumiSeal 1A33 TDS; IPC-CC-830C thermal shock protocol; Taylor & Kinner, “IPC-CC-830B Versus the Real World” (IPC APEX)

Practical implication: If your application involves sustained high temperatures (>125°C), wide thermal excursions on populated assemblies, or extreme cycle counts, silicone (SR) is the primary candidate — not because it passes a different IPC test, but because its inherently low elastic modulus prevents stress from being transferred to component leads and solder joints during real-world cycling.

3.3 Chemical Resistance

Chemical Agent	Acrylic	Polyurethane	Silicone	Epoxy
Humidity / Water vapor	✓	✓✓	✓✓	✓✓
Salt spray (marine / outdoor)	✓	✓✓	✓✓	✓✓
Fuels & petroleum oils	✗	✓	✗	✓✓
Solvents (ketones, alcohols)	✗ (dissolves)	Moderate	Moderate	✓✓
Acids & alkalis (industrial)	✗	Moderate	Moderate	✓✓
Corrosive gases (H₂S, Cl₂)	✗	✓	✓	✓✓

✓✓ = Excellent | ✓ = Good / Acceptable | ✗ = Not recommended. Always validate against specific chemical, concentration, and exposure duration using manufacturer TDS.

3.4 Dielectric Strength & Electrical Insulation

For high-voltage PCBs, high-frequency designs, or densely packed boards with narrow conductor spacing, the coating’s electrical properties directly affect safety and signal integrity. Always verify values at the intended film thickness from the specific product TDS.

Electrical Property	HumiSeal 1A33 (UR) — Reference Values	Test Method
Dielectric Withstand Voltage	>1,500 V	MIL-I-46058C
Dielectric Breakdown Voltage	7,500 V	ASTM D149
Dielectric Constant @ 1 MHz, 25°C	3.6	ASTM D150-98
Insulation Resistance (dry)	2.0 × 10¹⁴ Ω	MIL-I-46058C
Moisture Insulation Resistance	1.6 × 10¹⁰ Ω	MIL-I-46058C

Source: HumiSeal 1A33 Technical Data Sheet (Chase Corporation).

3.5 Reworkability & Repairability

#	Chemistry	Removal Method	Difficulty
1	Acrylic (AR)	Ketone/ester solvents (acetone, MEK); can solder through without removal	Easiest
2	Silicone (SR)	Swelling solvents; some grades peel; localized burn-through possible	Moderate
3	Polyurethane (UR)	Prolonged soak in strong stripper + ultrasonic or brush agitation	Difficult
4	Epoxy (ER)	Mechanical scraping or localized thermal removal; high board-damage risk	Very Difficult

3.6 Coating Thickness per IPC-CC-830C

Exceeding the maximum recommended thickness does not improve protection — it increases cracking risk, adds stress to component leads, and can prevent full cure through the film depth.

Chemistry	IPC-CC-830C Test Vehicle Range	IPC-A-610 Acceptance (production)
Acrylic (AR)	25–75 µm	30–130 µm
Polyurethane (UR)	25–75 µm	30–130 µm
Silicone (SR)	50–200 µm	50–210 µm
Epoxy (ER)	25–75 µm	30–130 µm

Sources: IPC-CC-830C (test vehicle thickness requirements, Table 4-II); IPC-A-610 (production acceptance). Note: IPC-CC-830C qualification testing is conducted within the narrower test vehicle range; IPC-A-610 provides the broader production acceptance window.

4. Application Methods and Material Compatibility

Robotic selective spray conformal coating machine applying coating to PCB assembly production line — Robotic selective spray system applies coating only to designated board areas, eliminating masking and enabling high-volume production.

The choice of application method and coating chemistry are interdependent. Viscosity, cure mechanism, and masking requirements vary significantly across methods. Common Methods to Apply Conformal Coating The Conformal Coating Process

Method	AR	UR	SR	ER	UV-Cure	Best For
Selective Spray (Robotic)	✓✓	✓✓	✓✓	✗	✓✓	High-volume; minimal masking; precise area control
Dip Coating	✓✓	✓✓	✓✓	✗	✗	Double-sided boards; complex geometries; high volume
Manual / Aerosol Spray	✓	✓	✓	✗	✓	Low volume; prototyping; requires full masking
Brush Application	✓✓	✓	✗	✗	✗	Rework and spot touch-up only
UV / Light-Cure System	✗	✗	Hybrid	✗	✓✓	Inline high-speed; solvent-free; instant tack-free cure

✓✓ = Fully compatible | ✓ = Compatible with constraints | ✗ = Not recommended

UV light cure conformal coating PCB board passing under LED UV lamp for instant tack-free cure — UV/light-cure systems deliver instant tack-free cure in seconds — eliminating oven queuing and maximizing throughput.

UV / Light-Cure note: UV-cure formulations offer instant tack-free cure in seconds — eliminating oven queuing and increasing throughput. For boards with deep shadow areas (BGAs, tall connectors), specify a multi-cure (UV primary + secondary heat or moisture cure) to ensure full protection under unirradiated zones. Advantages of Light-Cure Conformal Coatings

5. IPC-CC-830C Standard: What Engineers Need to Know To Optimize PCB Conformal Coating Process

IPC-CC-830C is the globally accepted qualification standard for liquid conformal coatings on printed wiring assemblies, published by IPC (Association Connecting Electronics Industries). For automotive, aerospace, medical, or defense programs, specifying an IPC-CC-830C qualified coating is typically a baseline requirement.

5.1 Qualification Test Battery

Tests are performed on standardized IPC-B-25A comb-pattern test boards. These tests establish a minimum performance baseline — a coating that passes all tests is qualified; it does not mean all qualified coatings perform identically in real-world conditions.

Test	Conditions	Pass Requirement
Visual Inspection	—	Free from foreign matter; uniformly applied
UV Fluorescence	UV lamp inspection	Coating must fluoresce uniformly
Insulation Resistance	Dry conditions	≥ 10⁹ Ω
Moisture & Insulation Resistance	85°C / 85% RH / 168 h	≥ 10⁹ Ω after exposure
Thermal Shock (baseline only — all qualified coatings pass)	50 cycles, −65°C to +125°C, flat board	No cracking, delamination, or discoloration
Fungus Resistance	28-day exposure	No fungal growth supported
Flexibility	Conical mandrel bend	No cracking
Flammability	UL94 V-0 method	Self-extinguishing
Hydrolytic Stability	Immersion test	Maintain electrical properties after immersion

Source: IPC-CC-830C Standard. Note: IPC-CC-830C does not include a salt spray test — applications requiring salt spray resistance must specify and validate against IEC 60068-2-11 or IEC 60068-2-52 separately.

IPC-CC-830C conformal coating qualification test comb pattern board IPC-B-25A after thermal shock and humidity testing — IPC-CC-830C qualification is performed on IPC-B-25A comb-pattern test boards. All 9 tests must pass for a coating to achieve qualified status.

5.2 IPC-CC-830C vs. MIL-I-46058C

Criteria	IPC-CC-830C	MIL-I-46058C
Status	Active (current standard)	Inactive since 1998
Applies to	Commercial, industrial, automotive, defense	Military / defense programs
Cross-recognition	IPC-CC-830 pass → effectively meets MIL-I-46058C requirements	MIL qualified ≠ retroactively IPC compliant
Dual-use note	HumiSeal 1A33 carries both MIL-I-46058C and IPC-CC-830B qualification

5.3 IPC-A-610: Workmanship Acceptance

While IPC-CC-830C qualifies the material, IPC-A-610 defines workmanship acceptance on the production PCB: acceptable and unacceptable coating coverage, maximum bubble and void criteria, UV inspection requirements, and thickness measurement. Both standards must be applied together for a complete quality system.

6. Selecting the Right PCB Conformal Coating by Industry Application

Conformal Coating Solution — Full Overview →

Industry / Application	Primary Environmental Challenge	Recommended Chemistry	Rework Priority	Standards / Additional Tests
Consumer Electronics	Humidity, dust, mild splash	Acrylic (AR)	High	IPC-CC-830C
Automotive (cabin)	Humidity, vibration, thermal cycling	Polyurethane (UR)	Medium	IPC-CC-830C, AEC-Q100
Automotive (underhood / EV power)	Fuels, oils, wide temp. range, thermal cycling on populated boards	Polyurethane (UR) or Silicone (SR)	Low–Med	IPC-CC-830C, ISO 26262; real-assembly thermal cycle validation required
Aerospace / Defense	Extreme thermal cycling, altitude, vibration	Silicone (SR) or Polyurethane (UR)	Low	IPC-CC-830C, MIL-I-46058C
Industrial / Factory Automation	Chemical splash, abrasion, dust	Polyurethane (UR) or Epoxy (ER)	Medium	IPC-CC-830C
Marine / Offshore	Salt spray, sustained humidity, corrosive gas	Polyurethane (UR) or Epoxy (ER)	Low	IPC-CC-830C + Salt Spray required: IEC 60068-2-11 (steady-state) or IEC 60068-2-52 (cyclic) — IPC-CC-830C alone does not cover salt spray
LED Lighting	High operating temp, thermal cycling	Silicone (SR) — do not coat LED emitter surfaces	Low	IPC-CC-830C
Harsh Chemical / Industrial	Concentrated acids, solvents, abrasion	Epoxy (ER)	Low (expect no rework)	IPC-CC-830C

General reference framework. Always validate the specific coating against your actual operating environment, cleaning process, and regulatory requirements. IPC-CC-830C provides a baseline qualification only — additional testing is required for salt spray, extreme thermal cycling on populated assemblies, and other application-specific stressors.

7. PCB Conformal Coating Products Selection Guide

Prostech is an authorized distributor of HumiSeal (Chase Corporation), Peters, Devcon, and Dymax. All products are available with TDS/MSDS documentation, free samples, and application engineering consultation.

7.1 HumiSeal — Acrylic & Urethane Series

	Product	Type	Key Characteristic	Certification
	HumiSeal 1B31	AR	Industry-standard acrylic; fast-drying; easiest rework; UV fluorescent; no-clean compatible	MIL-I-46058C & IPC-CC-830
	HumiSeal 1A33 Gel	UR	Thixotropic paste; selective dispensing on vertical surfaces; no sag; same chemistry as 1A33	RoHS, UL E105698

7.2 Peters ELPEGUARD Series

	Product	Type	Key Characteristic
	ELPEGUARD SL 1301 ECO-FLZ	AR	Eco-formulation; physically drying; higher reliability and service life for assembled PCBs

7.3 Devcon — Epoxy Series

	Product	Type	Key Characteristic
	Devcon Epoxy Coat 7000 Non VOC	ER	Solvent-free; zero-VOC; maximum chemical resistance; environmental compliance
	Devcon Epoxy Coat 7000 AR	ER	Abrasion-resistant epoxy; engineered for demanding physical and chemical environments

7.4 Dymax — UV / Light-Cure Series

	Product	Cure System	Key Characteristic
	Dymax Multi-Cure 984-LVUF	UV + Heat	100% solids; highly fluorescing; LED compatible (365/385/405 nm); instant tack-free cure
	Dymax 9483 Dual-Cure	UV + Moisture	Solvent-free; secondary moisture cure for shadow areas (BGAs, connectors); automotive-grade

→ View Full Conformal Coating Product List

8. PCB Conformal Coating Selection Checklist

Define the operating environment — sustained temperature range, thermal cycling profile on populated assemblies, humidity level, chemical exposure, salt spray exposure (marine/outdoor), mechanical stress
Define production constraints — volume, application equipment, curing capability, VOC compliance
Verify compliance requirements — IPC-CC-830C qualification, MIL-I-46058C (military), UL94 V-0, RoHS; for marine/outdoor: IEC 60068-2-11 or IEC 60068-2-52 salt spray testing
Evaluate reworkability — field or production repair expected? Select the least restrictive chemistry that still meets all performance requirements
Validate on real assemblies — IPC-CC-830C tests flat boards; request TDS; run application trials; conduct thermal cycling and SIR tests on populated PCBs before committing to production

Contact the Prostech Technical Team for a Free Consultation →