DYMAX 984-LVUF

Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others

DYMAX 984-LVUF

Main features

  • Ultra-Fluorescent Coverage Detection
  • Low-Viscosity Thin-Film Application
  • Room-Temperature UV Plus Heat Cure

Product Description

Dymax Multi-Cure 984-LVUF Ultra-Fluorescing Conformal Coating is a one-part, solvent-free conformal coating for electronic assemblies that require a strong inspection signal. UV light cures the low-viscosity material at room temperature, while secondary heat cure develops coating in shadowed areas. After cure, the clear film produces intense blue fluorescence under black light, supporting automated or visual coverage checks. The coating is intended for thin protective layers across lead frames, ceramic, PCB, flex, and silicon surfaces, with chemical and abrasion resistance for in-service assembly protection.

Key features

  • Ultra-Fluorescent Cure Inspection: Intense blue fluorescence supports automated or visual coating detection.
  • Low-Viscosity Thin Coating: The fluid form supports controlled application in thin conformal layers.
  • Light and Secondary Heat Cure: UV cure at room temperature is complemented by heat cure in shadowed areas.

Applications / Suitable for

  • Ultra-fluorescent conformal coating of electronic assemblies
  • Coating coverage inspection by automated or visual systems
Product Family

DYMAX 984-LVUF

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TDS, SDS & Technical Documents

Technical Specifications

General Properties
Appearance
Appearance at room temperature.
Colorless Transparent Liquid
Chemistry Type
Acrylated Urethane
Density (g)
1.05 g/cm3
Refractive index
The refractive index determines how much the path of light is bent, or refracted, when entering a material. It is calculated by taking into account the velocity of light in vacuum compared to the velocity of light in the material. The refractive index calculation can be affected by the wavelength of light and the temperature of the material. Even though it is usually reported on standard wavelengths it is advised to check the TDS for the precise test parameters.
1.49
Physical Properties
Viscosity
Viscosity is a measurement of a fluid’s resistance to flow. Viscosity is commonly measured in centiPoise (cP). One cP is defined as the viscosity of water and all other viscosities are derived from this base. MPa is another common unit with a 1:1 conversion to cP. A product like honey would have a much higher viscosity -around 10,000 cPs- compared to water. As a result, honey would flow much slower out of a tipped glass than water would. The viscosity of a material can be decreased with an increase in temperature in order to better suit an application
160 mPa.s
Mechanical Properties
Elongation
Elongation is the process of lengthening something. It is a percentage that measures the initial, unstressed, length compared to the length of the material right before it breaks. It is commonly referred to as Ultimate Elongation or Tensile Elongation at break.
4 %
Chemical Properties
Water Absorption
0.2 %
Other Properties
Storage Temperature
10 - 32 °C

Additional Information

Technical properties

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
Component count One-part - As supplied
Solvent content Solvent-free - As supplied
Viscosity 160 cP Typical; as supplied
Rheology Low viscosity - Thin-coating application
Primary cure UV light at room temperature - Directly exposed coating
Secondary cure Heat - Shadowed areas
Technical properties

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
Cured appearance Clear - After cure
Inspection fluorescence Ultra-fluorescent blue - Under black light
Recommended coating thickness 51 to 150 um Applied conformal coating
Light-cure depth 7 mil Direct light exposure
Chemical resistance Resistant - Cured coating; qualitative
Abrasion resistance Resistant - Cured coating; qualitative

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