DOWSIL™ 3-1953 Conformal Coating is a one-part, solventless silicone elastomer designed to protect electronic assemblies. It cures at room temperature to form a soft, stress-relieving coating, offering excellent dielectric properties and environmental protection.
Product Overview
Composition : One-part, translucent silicone elastomer.
Cure Mechanism : Moisture-cure at room temperature; optional mild heat acceleration.
Appearance : Translucent after curing.
Viscosity : Approximately 350 mPa=s.
Tack-Free Time : Approximately 8 minutes at 25°C and 50% RH.
Durometer Hardness : Shore A 34.
Dielectric Strength : Approximately 425 V/mil.
Volume Resistivity : Approximately 5.5 × 10¹⁵ ohm=cm.
Non-Volatile Content : Approximately 99.4%.
Source : Ellsworth Technical Data Sheet
Key Features
Solventless Formulation : Reduces VOC emissions and environmental impact.
Room Temperature Cure : Eliminates the need for ovens; suitable for temperature-sensitive components.
UV Indicator : Facilitates automated inspection under UV light.
Compliance : Meets UL 94 V-0 flammability rating, UL 746E, IPC-CC-830B, and MIL-I-46058C standards.
Application Methods : Versatile application via spray, dip, or flow coating.
Applications
DOWSIL™ 3-1953 is ideal for:
Protective Coating : For rigid and flexible circuit boards, offering protection against moisture, dust, and mechanical stress.
Printed Wiring Boards (PWB) : Particularly suitable for applications requiring toughness and abrasion resistance.
High-Performance Electronics : Used in environments where electronic assemblies are exposed to harsh conditions.
Safety and Handling Overview
Handling Precautions:
* Ensure adequate ventilation during application to minimize inhalation of vapors.
* Avoid contact with skin and eyes; use appropriate personal protective equipment.
* In case of skin contact, wash thoroughly with soap and water.
* In case of eye contact, flush with water and seek medical attention if irritation persists.
Storage Recommendations:
* Store in a cool, dry place away from direct sunlight.
* Keep containers tightly closed when not in use.
* Shelf life is up to 36 months when stored at room temperature in unopened containers.
First Aid Measures:
* Inhalation: Move to fresh air; seek medical attention if symptoms occur.
* Skin Contact: Wash with soap and water; remove contaminated clothing.
* Eye Contact: Rinse thoroughly with water; consult a physician if irritation develops.
* Ingestion: Do not induce vomiting; seek medical attention if necessary.
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