DOWSIL™ CC-8033 UV and Dual Moisture Cure Conformal Coating
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
Product Description
DOWSIL™ CC-8033 Conformal Coating is a one-part, solvent-based silicone conformal coating designed to protect printed circuit boards (PCBs) and electronic assemblies operating in demanding environments. The coating provides excellent flexibility, moisture resistance, and electrical insulation while maintaining protection through temperature fluctuations, vibration, and mechanical stress. Once cured, it forms a soft, elastomeric silicone coating that helps protect sensitive electronic components, solder joints, connectors, and exposed circuitry while reducing stress on components during thermal cycling.
Key features
- Medium viscosity (~15,000 cP) - Enables controlled application ideal for spray or needle dispensing
- Dual UV and Moisture-cure chemistry - Cures in seconds with UV light exposure and continues to cure with secondary moisture mechanism at room temperature.
- Soft elastomer after cure - Provides low-stress protection for sensitive components and solder joints.
- Spot and localized application control - Suitable for spray and needle applications
- Electrical insulation performance - Provides reliable dielectric protection for PCB assemblies.
- UV indicator - Enables inspection and verification of coating coverage under UV light.
Applications
DOWSIL™ CC-8033 RTV Coating is used for conformal coating of printed circuit boards and electronic assemblies where localized protection, controlled application, and higher coating build-up are required.
- Pin/solder joint coverage: suitable for localized protection of exposed conductive areas such as pins, solder joints, and lead terminations where environmental sealing and electrical insulation are required.
- Thin-section encapsulation: suitable for encapsulating small electronic features and components where flexible, low-stress silicone protection is required in confined or delicate areas.
- Spot protection of pins or other devices: suitable for targeted application on connectors, pins, and sensitive components requiring localized environmental protection and moisture resistance.
Related resources
TDS, SDS & Technical Documents
Technical Specifications
No specifications available.
Additional Information
DOWSIL™ CC-8033 UV and Moisture Dual Cure Conformal Coating
DOWSIL™ CC-8033 Conformal coating is a one-part, dual cure conformal coating designed to protect printed circuit boards and electronic assemblies from moisture, corrosion, thermal cycling, and environmental contaminants. The coating features a low viscosity of approximately 520 cP and cures quickly through UV curing. A secondary moisture cure takes care of any shadowed areas not fully cured by the UV.
UL 94 V-0
Review the technical data sheet and SDS before handling, processing, or qualifying the material.
Silicone Conformal Coating for Electronic Protection
DOWSIL™ CC-8033 RTV Coating cures upon exposure to atmospheric moisture, eliminating the need for solvent evaporation during processing. Its room-temperature cure can be accelerated with mild heat to support faster production cycles. The coating's high-viscosity, self-leveling formulation is suitable for a range of application methods and provides consistent coverage of electronic assemblies.
As a cured elastomer, DOWSIL™ CC-8033 UV RTV Coating delivers excellent flexibility and low-modulus properties, helping to minimize mechanical stress on sensitive components, solder joints, and interconnections during thermal cycling and environmental exposure.
Key features
- Dual cure system - Cures instantly upon exposure to UV light. A secondary moisture cure continues to cure the coating.
- Medium viscosity coating - ~15,000 cP viscosity enables easy application and good adhesion to most circuit board materials
- Flexible elastomer after cure - Shore A 30 material reduces mechanical stress on sensitive components and solder joints.
- UV indicator - Facilitates inspection and verification of coating coverage under UV light.
- Reliable environmental protection - Provides resistance to moisture, corrosion, and contaminants in harsh environments.
Processing summary
Product Documents and Dow Coating Resources
Review the technical data sheet for typical product properties, the safety data sheet for handling and storage requirements, and the Dow conformal coatings selection guide for broader context on the coating family.
Use the selection guide to compare DOWSIL™ conformal coating options by viscosity, cure profile, hardness, and agency listing context.
The Dow conformal coatings selection guide explains how silicone coatings are positioned by viscosity, cure profile, hardness, stress relief, abrasion resistance, UV inspection, and agency listing context. It also includes a solventless coating section for applications where reducing solvent-handling complexity is a key selection driver, along with comparison tables for solventless RTV, solventless heat-cure, and solvent-based RTV conformal coatings.
Performance Properties
Cure basis and test conditions are per technical data sheet unless otherwise stated.
| Property | Typical value | Unit |
|---|---|---|
| One or Two Part | one | |
| Color | Translucsent | |
| Non-Volatile Content | 95 | % |
| Viscosity | 15,000 | cp |
| Specific Gravity, Cured | 1 | |
| Durometer | 30 | Shore A |
| Tensile Strength | 150 | psi |
| Elongation | 105 | % |
| Dielectric Strength (Non-dried) | 415 | Volts/mil |
| Volume Resistivity (Non-dried) | 1.10E13 | ohm-cm |
| Dielectric Constant at 100 Hz | 2.66 | |
| Dielectric Constant at 100 kHz | 2.66 | |
| Dissipation Factor (Permittivity) 100 Hz | 0.0054 | |
| Dissipation Factor (Permittivity) 100 kHz | <0.002 | |
| UL Flammability Classification | 94 V-0 | - |
Where DOWSIL™ CC-8033 fits
UV VS led CURE PROFILES
A broad-spectrum “H” bulb or 365 nm LED UV curing equipment is recommended:
• UV and LED curable;
• No oxygen inhibition;
• 2J/cm2 UV irradiation depth of cure up to 3+ mm;
•Secondary moisture cure: tack-free time 48-72 hours;
Technical guidance
Tips and troubleshooting
| Issue | Recommended action |
|---|---|
| Air entrapment or voids |
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| Adhesion below target |
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| Curing |
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| Moisture exposure during storage |
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| Repair or rework requirement |
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Frequently asked questions about DOWSIL™ CC-80303 UV RTV Coating
What is DOWSIL™ CC-8033 Conformal Coating used for?
It is used as a protective conformal coating for rigid and flexible circuit boards and PCB system applications, particularly where flexibility, abrasion resistance, dielectric protection, and quick cure are part of the application review.
How does this coating cure?
DOWSIL™ CC-8033 has a dual curing mechanism. After application, it is exposed to UV light, which cures the coating in seconds. The secondary cure is a moisture cure, and happens over the course of a few days at room temperature.
Which application methods are supported?
DOWSIL™ cc-8033 has a medium viscosity ideal for spray and needle applications. Process fit should be confirmed against the target wet-film thickness, board layout, masking approach, and keep-out areas.
What does the UV indicator confirm?
The UV indicator supports inspection of coating presence. It should not be treated as proof of final dry-film thickness, full cure, adhesion, absence of defects, or long-term electrical reliability.
