DOWSIL™ 3140 RTV Coating
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- One-part silicone coating for room-temperature curing
- Resistant to moisture, chemicals, and UV
- Low viscosity for uniform coating and complete coverage
Product Description
DOWSIL™ 3140 RTV Coating is a one-part, room-temperature vulcanizing silicone coating designed to provide durable environmental and electrical protection for electronic components and assemblies. It features low viscosity for easy application, strong adhesion, and excellent dielectric performance. Upon curing, it forms a flexible, protective coating resistant to moisture, chemicals, and temperature extremes.
Product Key Features
- One-part silicone coating for room-temperature curing
- Low viscosity for uniform coating and complete coverage
- Excellent dielectric strength and electrical insulation
- Flexible, durable protective layer
- Resistant to moisture, chemicals, and UV
- Operating temperature range: -55°C to 200°C
- Good adhesion to various substrates
- Non-flammable and UL recognized for electrical applications
Applications
- Coating of printed circuit boards (PCBs)
- Encapsulation of sensors and electronic modules
- Protection of connectors, relays, and transformers
- Industrial and automotive electronics
- Moisture and corrosion protection for sensitive electronics
- General electrical insulation and protective coating
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Mechanical Properties
Electrical Properties
Thermal Properties
Additional Information
Frequently Asked Questions About DOWSIL™ 3140 RTV Coating
What are typical applications for DOWSIL™ 3140?
DOWSIL™ 3140 is used for protective coating and encapsulation of electronics, including:
- Coating PCBs and power modules
- Encapsulation of sensors and instrumentation
- Protection of connectors, relays, and transformers
- Moisture and corrosion prevention in electronics
Why choose DOWSIL™ 3140?
This RTV coating offers excellent flowability, long-term flexibility, and strong adhesion. Its protective properties make it ideal for electronics operating in harsh environments or exposed to moisture and contaminants.
How does it cure?
DOWSIL™ 3140 cures at room temperature upon exposure to atmospheric moisture, forming a flexible, durable silicone layer. Typical cure times vary with coating thickness and humidity.
What application methods are supported?
The material can be applied by brushing, dipping, spraying, or automated dispensing to provide uniform protective coatings.
What surface preparation is required?
Ensure substrates are clean, dry, and free from oils, dust, or flux residues for optimal adhesion and performance.
Is the coating repairable?
Yes, cured coatings can be carefully removed or cut for repair. Additional RTV can then be applied to restore protection.
Learn More About DOWSIL™ 3140
DOWSIL™ 3140 RTV Coating is engineered to provide durable protection for electronic systems exposed to moisture, chemicals, and extreme temperatures. This one-part silicone coating delivers reliable electrical insulation, long-term flexibility, and strong adhesion across a variety of industrial and electronics applications.
Main Advantages of DOWSIL 3140
Low viscosity allows uniform coating over complex geometries and fine features.
Provides durable protection against water, chemicals, and environmental stress.
Stable performance over a wide temperature range for harsh environments.
High dielectric strength ensures reliable electrical insulation.
How to Choose a Coating
- ✔ Cure requirements and processing method
- ✔ Electrical insulation needs
- ✔ Environmental exposure and stress
- ✔ Application method (brush, dip, spray)
- ✔ Thermal and chemical resistance requirements
Compliance You Can Trust ✅
- UL recognized for electrical insulation
- RoHS / REACH Compliant
- Durable protection for sensitive electronics
