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Dow DOWSIL 3140 RTV Silicone Conformal Coating Clear 17.6 kg Pail - 3140 17.6KG MIL-A-46146
$4,752.55
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Dow DOWSIL 3140 RTV Silicone Conformal Coating Clear 493 g Can - 3140 493G MIL-A-46146

$228.44
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SKU: 3140 493G MIL-A-46146
California prop 65
Description

Description

The DOWSIL 3140 RTV Silicone Conformal Coating is a high-performance, one-component, moisture-curing silicone designed to protect sensitive electronic assemblies from moisture, corrosion, and contaminants. Developed by Dow, this solvent-free coating provides a clear, flexible barrier that maintains dielectric strength and long-term reliability in harsh environments.

Engineered for high-reliability electronics, aerospace, and industrial applications, DOWSIL 3140 cures at room temperature to a resilient rubber film. Its low-stress, non-corrosive formulation makes it suitable for delicate substrates such as PCBs, connectors, and sensors, while its MIL-A-46146 and UL 94 V-1 certifications ensure compliance with rigorous industry standards.


Key Features

• One-Component RTV Silicone: Ready-to-use coating with no mixing required.

• Transparent, Solvent-Free Formula: Provides residue-free coverage without shrinkage or outgassing.

• Exceptional Dielectric Properties: Maintains insulation integrity under high humidity or voltage stress.

• High Elongation & Flexibility: Protects delicate solder joints and components during thermal cycling.

• Meets MIL-A-46146 & UL 94 V-1: Compliant with military and UL safety standards.

• Corrosion & Moisture Resistant: Seals against humidity, salt spray, and atmospheric contaminants.

• UV-Traceable Coating: Simplifies visual inspection for uniform coverage.

• Room-Temperature Cure: Fast, convenient application process with optional heat acceleration.


Applications

• Printed Circuit Boards (PCBs): Protective coating for conformal sealing and electrical insulation.

• Aerospace & Defense Electronics: Shields avionics and mission-critical systems from moisture and vibration.

• Medical Devices & Instrumentation: Reliable dielectric barrier for sensors and control units.

• Automotive Electronics: Ensures stability of engine-control and under-hood modules in extreme conditions.

• Power Supplies & Transformers: Enhances performance and prevents corona discharge.

• Cleanroom Manufacturing: Ideal for assembly environments requiring low contamination and solvent-free materials.


Benefits

• Enhanced Durability: Long-term environmental protection for sensitive electronic assemblies.

• Reduced Processing Time: Single-component, self-leveling coating simplifies application.

• High Transparency: Enables optical inspection without removal.

• Reliable Performance Across Temperatures: Maintains flexibility from –45 °C to +200 °C.

• Trusted Brand: Backed by Dow’s proven record of silicone innovation and reliability.


Product Specs

Brand DOWSIL
Color Clear
Components 1 part
Cure System RTV
Cure Time 24 to 72 hours at room temperature
Dielectric Strength 450 V/mil
Elongation 420%
Flash Point >101.1 °C
Hardness 34 A
Specific Gravity 1.05 @ 25 °C
Tack-Free Time 105 min
Tensile Strength 495 psi
Viscosity 30,000
Volume Resistivity 2.1 × 10¹⁴ ohm-cm

Categories

• DOWSIL Silicone Coatings

• Conformal Coatings & Sealants

• Electronics Protection Materials

• Industrial & Aerospace Adhesives

• Cleanroom Assembly Products

Reviews

FAQs

What is DOWSIL Silicone Conformal Coating used for?

This solvent-free silicone coating provides long-lasting protection for sensitive electronic components such as circuit boards, sensors, and connectors. It shields against moisture, corrosion, and environmental damage, maintaining insulation integrity and performance. The coating is ideal for aerospace, automotive, and industrial applications requiring durable, flexible, and reliable electrical protection.

How does DOWSIL Silicone Conformal Coating cure and apply?

The coating cures at room temperature through ambient moisture without requiring mixing or catalysts. It forms a smooth, self-leveling film that ensures consistent coverage. For faster production processes, it can also be heat-accelerated. Its easy application makes it suitable for both manual and automated manufacturing environments.

What standards does DOWSIL Silicone Conformal Coating meet?

This coating complies with recognized military and industrial standards for quality and safety. It meets UL 94 V-1, IPC-CC-830, and other MIL specifications, ensuring high dielectric strength and flame resistance. These certifications make it suitable for mission-critical electronics in demanding industries like defense, aerospace, and advanced manufacturing.

What environmental conditions can this coating withstand?

Once fully cured, the coating remains flexible and stable under extreme temperature variations ranging from −45 °C to +200 °C. It resists humidity, dust, and corrosive environments, maintaining adhesion and dielectric strength. This reliability ensures long-term protection for devices exposed to harsh or fluctuating operating conditions.

Does DOWSIL Silicone Conformal Coating allow visual inspection?

Yes, it contains a UV-traceable additive that allows users to easily verify coverage under ultraviolet light. The coating cures to a clear, residue-free film, simplifying inspection and rework. This feature supports cleanroom use and ensures consistent, reliable application across critical manufacturing and electronic assembly processes.