Applications

Everwide JA940-23 Epoxy for Potting and Bonding

Brand: Everwide
Product Number: JA940-23
Technology: Epoxy for Potting and Bonding
Color: Black (Part A), Milky to Creamy (Part B)
Cure Type: Room Temperature or Heat Curing
Package Size: Contact us for details
Shelf Life: 1 year

Product Description

Everwide JA940-23 is a two-component epoxy designed for structural bonding and potting applications. This high-performance adhesive provides excellent toughness, low thermal stress, and superior thermal shock resistance. It exhibits strong adhesion to various materials, fast curing at low temperatures, and outstanding electrical insulation retention in high-humidity conditions.

Key Features

  • Excellent toughness, low thermal stress, and thermal shock resistance
  • Strong electrical insulation, even in high humidity
  • Cured surface remains smooth, with no oiliness or poor gloss
  • Fast curing at low temperatures, reducing working time and increasing efficiency
  • Ideal for electronic encapsulation and casting
  • Complies with 2011/65/EU RoHS regulations
  • Certified to UL94V-0 flame retardant standards

Recommended Applications

  • Potting and encapsulation of electronic devices
  • Structural bonding of various materials, including plastics, metals, and ceramics
  • Applications requiring high electrical insulation and mechanical strength

Technical Data

Typical Uncured Properties
Property JA940-23A (Part A) JA940-23B (Part B)
Appearance Liquid Liquid
Color Black Milky to Creamy
Viscosity (25°C, cps) 12,000–18,000 (S14 20rpm) 20,000–30,000 (S14 20rpm)
Viscosity (25°C, cps) 28,000–44,000 (S14 2rpm) 44,000–66,000 (S14 2rpm)
Thixotropic Index 3–4 2.2
Specific Gravity 1.45 1.33
Curing Properties
Property Value
Mix Ratio (A:B) by Weight 2:1
Pot Life (25°C) 1–2 hr
Surface Dry Time (25°C) 8 hr
Through Cure Time (25°C) 5–7 days
Typical Cured Properties
Property Value
Glass Transition Temperature (Tg) (MDSC) 55°C
Glass Transition Temperature (Tg) (TMA) 66°C
CTE (<Tg), µm/m/°C 49
CTE (>Tg), µm/m/°C 184
Durometer Hardness (Shore D) 85
Specific Gravity 1.36
Water Absorption (25°C, 24 hr) 0.3%
Degradation Temperature (TGA, 10°C/min) 337°C
Weight Loss Ratio @ 100°C 0%
Weight Loss Ratio @ 150°C 0%
Weight Loss Ratio @ 200°C 0%
Weight Loss Ratio @ 250°C 0.2%
Weight Loss Ratio @ 300°C 2.3%
Weight Loss Ratio @ 350°C 6.3%
Volume Resistivity 5 × 10¹⁵ ohm-cm
Surface Resistivity 5 × 10¹⁴ ohm
Dielectric Constant (100Hz) 4.5
Temperature Range -40 to 105°C

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