Dowsil 3-1965 is a one-part, solventless RTV silicone conformal coating designed to protect electronic assemblies through a moisture-cure mechanism. In production use, it is applied directly from the container without solvent blending, supporting a clean handling process and consistent wetting on populated boards. After curing, it forms a clear elastomeric layer that improves assembly robustness and supports stable performance in demanding service conditions common in electronics manufacturing.

• Low Viscosity - Dowsil 3-1965 is formulated for efficient flow and capillary penetration across dense PCB layouts. Typical low-viscosity silicone conformal coatings operate in the range of 50–300 mPa·s at 25 °C, enabling uniform coverage around fine-pitch components and narrow spacing. This flow behavior helps reduce skips and improves coating continuity across complex board geometries.

  
  

• Solventless System - The coating contains no added solvent, supporting reduced volatile emissions during application and curing. With solvent content at 0 percent, VOC release is significantly lower than solvent-borne coatings that often contain 30–60 percent solvent fraction. This supports improved workplace air quality and reduces solvent flash-off variability that can affect film uniformity.

  
  

• Moisture Cure - Dowsil 3-1965 cures at room temperature by reacting with atmospheric moisture, eliminating the need for high-temperature ovens. Standard RTV moisture-cure coatings typically achieve tack-free surfaces within 10–30 minutes at 25 °C and 50 percent relative humidity, with full cure progressing through thickness over time. This enables stable throughput planning and simplified line integration for electronics coating processes.

  
  

• Soft Elastomer - After cure, the coating forms a flexible elastomer layer that supports strain relief for sensitive joints and interconnects. Cured silicone elastomers commonly show elongation values above 100 percent and maintain flexibility at low temperatures, helping reduce stress concentration under vibration or thermal cycling. 

  
  

• UV Traceability - The formulation includes a UV inspection indicator to support fast in-line quality checks. Under UV light in the common 365 nm inspection range, the coating fluoresces to reveal coverage, allowing operators to identify thin areas, missed zones, or edge gaps.

• Electronics - Dowsil 3-1965 is used as a conformal coating for electronic assemblies requiring transparent protection against humidity and contamination. The cured elastomer layer supports moisture barrier performance while maintaining mechanical compliance on mixed-component boards. This helps stabilize electrical performance and reduce corrosion-related failure risks in harsh operating environments.

  
  

• PCB Protection - The coating is applied on printed circuit boards to improve resistance to condensation, airborne pollutants, and handling contamination. Clear coverage enables post-coat inspection of marks and traces while providing a protective barrier over solder joints and component terminations. This supports higher long-term reliability for assemblies used in demanding service conditions.

  
  

• LED Packaging - Dowsil 3-1965 is used in LED-related assemblies where transparent, moisture-cured silicone protection is required. The clear cured film supports optical cleanliness while providing environmental protection for circuits and interconnections. This contributes to stable operation and reduced risk of moisture-related degradation in LED modules.