DYMAX 9-20557
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- Flexible Low-Modulus Protection
- Light and Shadow-Area Cure
- Fluorescent Conformal-Coverage Inspection
Product Description
Dymax Multi-Cure 9-20557 Flexible Light-Cure Conformal Coating is a single-component, medium-viscosity conformal coating for printed circuit boards and electronic assemblies. UV or visible light cures exposed areas, while secondary heat cure develops coating in shadowed regions. The flexible, low-modulus cured film provides protective coverage without the rigidity of a bulk encapsulant. Blue fluorescence supports inspection, and the coating can be applied across metal, ceramic, PCB, flex, and silicon surfaces. Its solvent-free acrylated urethane form avoids component mixing and supports controlled dispensing.
Key features
- Flexible Low-Modulus Protection: The cured film combines conformal coverage with a flexible mechanical profile.
- Light Plus Shadow-Area Cure: UV or visible light cure is complemented by secondary heat cure in shaded regions.
- Blue-Fluorescent Inspection: Fluorescence under black light supports coating coverage checks.
Applications / Suitable for
- Conformal coating of printed circuit boards
- Conformal coating of electronic assemblies
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Mechanical Properties
Chemical Properties
Other Properties
Additional Information
As-supplied / before-processing properties
As-supplied characteristics used for material and process evaluation. Numerical values are typical unless otherwise identified.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Solvent content | No nonreactive solvents | - | As supplied |
| Chemical class | Acrylated urethane | - | As supplied |
| Appearance | Clear to light yellow | - | As supplied |
| Density | 1.05 | g/ml | ASTM D1875 |
| Viscosity | 2,300 nominal | cP | ASTM D1084; 20 rpm |
| Shelf life | 12 | months | Original unopened container; store at 10 to 32 deg C |
After-processing / final-state properties
Final-state characteristics after the stated cure or processing condition. Numerical values are typical unless otherwise identified.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Durometer hardness | D60 | - | ASTM D2240 |
| Tensile strength at break | 10 (1,500) | MPa (psi) | ASTM D638 |
| Elongation at break | 110 | % | ASTM D638 |
| Modulus of elasticity | 89 (13,000) | MPa (psi) | ASTM D638 |
| Boiling water absorption | 2.7 | % | ASTM D570; 2 hr |
| Water absorption | 1.0 | % | ASTM D570; 25 deg C for 24 hr |
| Dielectric withstand voltage | >1,500 | V | MIL-I-46058C |
| Volume resistivity | 1.48 x 10^15 | ohm cm | ASTM D257 |
