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LOCTITE STYCAST UV 7993 – Urethane Conformal Coating – Rugged moisture and chemical protection for printed circuit boards

  • Item Name: LOCTITE STYCAST UV 7993
  • Manufacturer: Henkel
  • Product category: Conformal Coating
  • Technologies: Urethane
  • Applications: Designed to protect printed circuit boards from moisture and chemicals using UV activation followed by ambient moisture cure in shadowed areas.
  • Color: Translucent yellow
  • Cure type: UV light activation followed by room temperature moisture cure
  • Package size: Contact to Techniq VN for details
  • Shelf life: 1 year

1. Product Overview

LOCTITE STYCAST UV 7993 is a one-component, UV-curable urethane conformal coating that also moisture-cures in shadowed areas. It provides rugged protection against moisture and harsh chemicals.

Key Benefits:

  • UV & moisture cure for comprehensive coverage
  • Solvent-free and one-component formula
  • Excellent moisture and chemical resistance
  • Operating Temperature: -40 to 130°C

2. Applications

  • Conformal coating for PCB protection
  • Compatible with solder masks, no-clean fluxes, metallization, and components

3. Typical Properties

Property Value
Uncured Properties
Brookfield Viscosity (mPa·s) 120
Specific Gravity 1.04
Shelf Life @ 25°C (days) 365
Curing Conditions
UVC Cure (Tack-free Surface)
Exposure Time (seconds) 5 – 10
Light Intensity (mW/cm²) >60
Cure Energy (mJ/cm²) >300
UVA Cure
Wavelength (nm) 365
Exposure Time (seconds) 10 – 20
Light Intensity (mW/cm²) 150 – 300
Cure Energy (mJ/cm²) >1,500
Moisture Cure for Shadowed Areas
Relative Humidity 50% @ 25°C 100 hours
Relative Humidity >70% @ 25°C 50 hours
Cured Properties
Hardness (Shore A) 80
Hardness (Shore D) 60
Modulus (N/mm²) 1,150 (166,650 psi)
Electrical Properties
Volume Resistivity (Ω·cm @ 25°C) 2.2 × 10¹⁶
Dielectric Strength (kV/mm) 50
Dielectric Constant 3.34
Dissipation Factor 0.0131
Performance Properties
Tensile Strength (N/mm²) 35 (5,005 psi)

BERGQUIST microTIM mTIM 1028 Thermal Interface Coating High performance thermal management solution for nickel finished heat sinks, optical transceivers, and data center liquid cooling systems

BERGQUIST microTIM mTIM 1028 is purpose built for riding cage assemblies in servers, switches, and routers, interfacing with electroless nickel plated copper or aluminum heat sinks. It ensures stable operation in high power transceiver modules while also extending applicability to liquid cooling components, heat pipes, and fin based dissipative structures.

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