Applications

LOCTITE SI 5290 – Silicone conformal coating – Protecting printed circuit boards and electronics

  • Item Name: LOCTITE SI 5290
  • Manufacturer: Henkel
  • Product Category: Conformal Coating
  • Technologies: Silicone (Alkoxy silicone)
  • Applications: Provides environmental protection for printed circuit boards and other sensitive electronic components.
  • Color: Transparent amber to yellow liquid
  • Cure Type: Ultraviolet (UV) light cure with secondary moisture cure
  • Package Size: Contact Techniq VN for details.
  • Shelf Life: Contact Techniq VN for details.

1. Product Overview

  • Technology: Silicone
  • Type: Alkoxy silicone, one-component
  • Curing: Ultraviolet (UV) light with secondary moisture cure
  • Appearance: Transparent amber to yellow liquid
  • Application: Conformal coating for PCB and sensitive electronics
  • Key Features:
    • Environmental protection
    • Enhances shock absorption
    • Operating temperature: -53 °C to 204 °C

2. Applications

  • Protects printed circuit boards (PCB) and electronic components from environmental exposure.
  • Designed for applications where UV curing is needed for rapid strength development.
  • Secondary moisture cure ensures coverage of shadowed areas.

3. Typical Properties

Properties Uncured Cured
Viscosity (mPa·s, 25°C) 100 – 350
Specific Gravity (@ 25°C) 1.0
Non-Volatile Content (%) ≥92
Shore Hardness (OO) 70 – 85
Elongation (%) 15
Tensile Strength (N/mm²) 0.5 (70 psi)
Tear Strength (N/mm) 0.8 (5 lb/in)
Glass Transition (°C) -45
Thermal Conductivity (W/m·K) 0.15
Water Absorption (24h @ 23°C, %) 0
Water Vapor Transmission Rate (g/h·m²) 1.7
Dielectric Strength (kV/mm) 18
Volume Resistivity (Ω·cm) 2×10¹⁴

4. Curing Performance

  • UV Cure: Minimum irradiance of 70 mW/cm² for 20-40 sec
  • Secondary Cure: Moisture cure begins upon exposure to air; full performance in 72 hours
  • Tack-Free Time:
    • UV Cure: 20-40 sec
    • Moisture Cure (@ 25°C, 50% RH): ≤18.3 hours
  • UV Depth of Cure: ≥0.9 mm

RELATED PRODUCT

Contact Technical Support

Leave your information or connect via Hotline, and our expert team will reach out immediately to provide professional consultation and customized solutions.

(+84) 889 901 929

Email: info@techniq.vn

Our Technical Support Team is on hand from 8:30 AM to 5:30 PM (GMT+7).

For requests outside these hours, please submit your request form and we will respond at the earliest opportunity.