Applications

Everwide JC258-1 High-Performance Epoxy Adhesive

Brand: Everwide
Product Number: JC258-1
Technology: High-Performance Epoxy Adhesive
Color: Black (Part A), Yellow (Part B)
Cure Type: Heat Curing
Package Size: Contact us for details
Shelf Life: 1 year

Product Description

Everwide JC258-1 is a two-component, medium-viscosity, toughened epoxy adhesive designed for high-performance bonding applications. The cured resin exhibits exceptional peel and shear strength, with outstanding crack and fatigue resistance for vibration-prone environments. This adhesive is compatible with plastics, metals, glass, and ceramics, offering excellent durability and passing multiple environmental test standards.

Key Features

  • Exceptional environmental resistance with high retained strength
  • Superior shear and peel strength compared to conventional epoxies
  • Higher glass transition temperature (Tg) than standard two-component epoxies
  • Strong moisture and water resistance
  • Excellent chemical and solvent resistance
  • Thixotropic formulation, providing controlled flow and sag resistance
  • Complies with 2011/65/EU RoHS regulations

Recommended Applications

  • Structural bonding of plastics, metals, glass, and ceramics
  • Industrial applications requiring high shear, peel, and fatigue resistance
  • Adhesion in vibration-prone environments

Technical Data

Typical Uncured Properties
Property JC258-1A (Part A) JC258-1B (Part B)
Appearance Liquid Liquid
Color Black Yellow
Viscosity (25°C, S14 20rpm, cps) 22,000–34,000 13,000–22,000
Viscosity (25°C, S14 2rpm, cps) 60,000–100,000 17,000–30,000
Thixotropic Index ≥2.0 ≥1.2
Mixing Viscosity (25°C, S14 20rpm, cps) 27,000–42,000
Thixotropic Index (Mixed) ≥2.5
Curing Properties
Property Value
Mix Ratio (A:B) by Weight 2:1
Pot Life (25°C) 20–30 min
Surface Dry Time (25°C) 4 hr
Through Cure Time (25°C) 7 days
Through Cure Time (80°C) 1 hr
Typical Cured Properties
Property Value
Glass Transition Temperature (Tg) (DSC) 60°C
Glass Transition Temperature (Tg) (MDSC) 62°C
Glass Transition Temperature (Tg) (TMA) 66°C
CTE (35–55°C), µm/m/°C 96
CTE (90–130°C), µm/m/°C 188
Durometer Hardness (Shore D) 76
Specific Gravity 1.07
Water Absorption (25°C, 24 hr) 0.24%
Water Absorption (80°C, 24 hr) 2.19%
Water Absorption (97°C, 1.5 hr) 0.78%
Shear Strength (Al vs. Al) 454 kgf/cm²
Degradation Temperature (TGA, 10°C/min) 288°C
Weight Loss Ratio @ 100°C 0.01%
Weight Loss Ratio @ 150°C 0.63%
Weight Loss Ratio @ 200°C 1.19%
Weight Loss Ratio @ 250°C 2.52%
Weight Loss Ratio @ 300°C 6.06%
Weight Loss Ratio @ 350°C 11.19%
Thermal Conductivity 0.3 W/mK
Thermal Resistance 0.01 m²K/W
Volume Resistivity 5 × 10¹⁵ ohm-cm
Surface Resistivity 5 × 10¹⁴ ohm
Dielectric Constant (100Hz) 4.1

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