Features and Benefits

LOCTITE STYCAST ES 1904, Epoxy, Potting and Encapsulating
LOCTITE® STYCAST ES 1904 is an opaque, medium-viscosity epoxy resin formulation recommended for small potting and laminating applications, excellent structural, mechanical and electrical properties are required. This two-part adhesive exhibits good wetting, cures at room temperature and develops strong, low shrinkage bonds to most materials including optical fibers, glass ceramics, most metals. It has excellent dimensional stability over a wide temperature range. This product is typically used in applications with an operating range of -60 °C to +125 °C.
  • Two components - requires mixing
  • Medium viscosity
  • Good wetting
  • Excellent dimensional stability over a wide temperature range
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Technical Information

Applications Encapsulating
Coefficient of Thermal Expansion (CTE), Above Tg 190.0 ppm/°C
Coefficient of Thermal Expansion (CTE), Below Tg 68.0 ppm/°C
Color Opaque
Cure Type Room Temperature (Ambient) Cure
Glass Transition Temperature (Tg) 80.0 °C
Mix Ratio, by Volume 2 : 1
Mix Ratio, by Weight 100 : 46
Number of Components 2 Part
Shore Hardness, Durometer D 90.0
Technology Epoxy
Pot Life, Mixed @ 25.0 °C 100 g mass 8.0 - 10.0 min.
Density, Resin @ 25.0 °C 1.19 g/cc
Viscosity, Resin @ 25.0 °C 25000.0 mPa·s (cP)
Density, Hardener @ 25.0 °C 1.09 g/cc
Viscosity, Hardener @ 25.0 °C 50000.0 mPa·s (cP)