Protective conformal coating. Dow DOWSIL Q1-4010 Conformal Coating Clear is a one-component, heat-curing, solvent-free elastomer used as a protective coating for printed wiring boards, sensitive components, and flexible and rigid circuit boards. It offers medium viscosity, UV indicators for inspection, and mechanical and environmental protection. This 453 g bottle is a Dow product repackaged by KitPackers, an authorized repackager of Dow.
How conformal coatings work. Conformal coatings are applied in thin layers, typically a few mils or microns, onto printed circuits or other substrates. They provide proven, cost-effective environmental and mechanical protection that can significantly extend the life of the components they cover, guarding against moisture, contaminants, and mechanical stress.
Cure and processing. Q1-4010 is a stress-relieving, no-solvent-added coating with rapid, versatile cure processing controlled by temperature. Time to cure depends on film thickness, oven type, and board population density; large, heavily populated boards can take longer because their greater thermal mass takes extra time to reach temperature.
Adhesion and recognition. Dow conformal coatings are formulated to adhere to most common substrates; on difficult, low-surface-energy surfaces, adhesion may be improved by priming or surface treatment such as chemical or plasma etching. Q1-4010 is UL, IPC, and MIL recognized, and its good adhesion allows use with many low-solids (no-clean) and no-lead solders.
Recommended For
Protective coating of printed wiring boards
Protecting sensitive components
Flexible and rigid circuit boards
Smaller-volume or bench-scale coating work
Applications needing UV-inspectable coatings
Product Details
Product type: One-part silicone conformal coating
Color: Clear / transparent
Viscosity: Medium viscosity
Cure: Heat cure (temperature-controlled)
Solvent: Solvent-free / no solvent added
Inspection: UV indicators for inspection
Recognition: UL, IPC, and MIL recognized
Packaging: Repackaged by KitPackers; 453 g bottle
Primary Industries
Electronics and PCB manufacturing
Aerospace and defense electronics
Industrial electronics
Communications equipment
Standards and Certifications
UL recognized
IPC recognized
MIL (military specification) recognized
FAQs
What is DOWSIL Q1-4010 used for?
It is a one-part silicone conformal coating applied in thin layers to printed wiring boards, sensitive components, and flexible or rigid circuit boards. It provides environmental and mechanical protection that helps extend component life, and its UV indicators let inspectors verify coverage under ultraviolet light after application.
What does the 453 g bottle format offer?
The 453 g bottle is a smaller, bench-friendly format of the same Q1-4010 coating, repackaged by KitPackers, an authorized Dow repackager. It suits lower-volume production, rework, and laboratory use where a full pail would be excessive, while delivering the identical Dow material and its documented properties.
Why does the coating contain UV indicators?
UV indicators cause the clear coating to fluoresce under ultraviolet light, allowing operators and automated optical inspection systems to confirm that every intended area is coated and to spot any gaps. This supports quality control on populated boards where a transparent coating would otherwise be difficult to see and verify.
Is Q1-4010 solvent-free, and how is it cured?
Yes, it is a solvent-free, no-solvent-added elastomer, and it is heat-cured with cure controlled by temperature. Time to cure depends on film thickness, oven type, and board population density, so large or densely populated boards take longer because their greater thermal mass requires more time to reach the required temperature.
Does the coating meet industry standards?
Dow states that Q1-4010 is UL-, IPC-, and MIL-recognized, making it suitable for applications that require these recognitions. Because listings and revisions can change over time, users needing formal qualification for a specific standard should confirm the current recognition status for their exact grade and application.
