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LOCTITE STYCAST US 0155

  • Item Name: LOCTITE STYCAST US 0155
  • Manufacturer: Henkel Corporation
  • Product category: Urethane potting and encapsulating compound
  • Technologies: Urethane technology based on castor oil/MDI
  • Applications: Designed for potting indoor/outdoor telephone connector blocks and various electronic or electrical devices.
  • Color: Resin (Component A) is Amber; Hardener (Component B) is White; Cured appearance is Tan
  • Cure type: Room temperature cure
  • Package size: Contact to Avantek for details
  • Shelf life: Contact to Avantek for details

1. Product Overview

LOCTITE STYCAST US 0155 is a low-viscosity, flexible, flame-retardant urethane-based potting and encapsulating compound. It is designed primarily for potting indoor and outdoor telephone connector blocks and offers excellent adhesion to thermoplastic and thermoset materials, including ABS. The product provides good thermal conductivity and flame retardancy.

2. Applications

  • Potting and encapsulating electronic and electrical devices
  • Protection of indoor and outdoor telephone connector blocks
  • Suitable for applications requiring flexibility and flame retardancy

3. Typical Properties

Property Part A Part B Mixed
Appearance Amber White Tan
Density (g/cm³, 25°C) 1.24 1.47 1.38
Viscosity (cP, Brookfield RVF) 200 (Spindle 2, 20 rpm) 7,500 (Spindle 4, 12 rpm) 3,500 (Spindle 6, 10 rpm)
Curing Properties
Curing Condition Time
Room temperature cure 16 hours @ 25°C
Accelerated cure 1–3 hours @ 60–85°C
Properties of Cured Material
Physical Properties Value
Shore Hardness (Durometer A) 83
Water Absorption (24 hrs) 0.1%
Tensile Strength 320 psi
Elongation 40%
Glass Transition Temperature (Tg) 0°C
Coefficient of Thermal Expansion (ppm/°C) 109 (below Tg), 153 (above Tg)
Thermal Conductivity 0.47 W/(m·K)
Weight Loss after 168 hrs @ 125°C 1.96%
Electrical Properties Value
Dielectric Strength (20 mil) 942 V/mil
Surface Resistivity @ 25°C 8.5 × 10¹³ Ω
Volume Resistivity 1.1 × 10¹⁴ Ω·cm
Dielectric Constant / Dissipation Factor @ 25°C 6.85 / 0.09 (100 Hz)
5.96 / 0.13 (1 kHz)
4.2 / 0.08 (100 kHz)

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