Dow DOWSIL 3140 RTV Silicone Conformal Coating Clear 493 g Can - 3140 493G MIL-A-46146
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