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LOCTITE STYCAST 2651 CAT 11 – Epoxy Encapsulant – General purpose dielectric encapsulation with excellent adhesion to diverse substrates

  • Item Name: LOCTITE STYCAST 2651 CAT 11
  • Manufacturer: Henkel
  • Product category: Encapsulation Adhesive
  • Technologies: Epoxy
  • Applications: Ideal for dielectric encapsulation with excellent adhesion to various substrates.
  • Color: Black
  • Cure type: Heat cure
  • Package size: Contact to Techniq VN for details
  • Shelf life: Approximately 9 months

1. Product Overview

LOCTITE STYCAST 2651 CAT 11 is a black, dielectric-grade epoxy encapsulant designed for general-purpose applications. It offers excellent adhesion to various substrates and can be used with different catalysts.

Key Benefits:

  • General-purpose encapsulation
  • Compatible with multiple catalysts

2. Applications

  • Electrical and electronic encapsulation
  • Protection of components from environmental exposure
  • Potting applications requiring good adhesion and dielectric properties

3. Typical Properties

Uncured Properties

Property LOCTITE STYCAST 2651 LOCTITE CAT 11 Mixed System
Appearance Black
Viscosity (mPa·s) @ 25°C 225,000 45 (at 65°C) 25,000
Density (g/cm³) 1.65 1.56
Shelf Life @ 25°C (days) 274
Work Life (100g @ 25°C) >4 hours

Curing Performance

Temperature (°C) Cure Time
80 8-16 hours
100 2-4 hours
120 30-60 min
Post-curing at the highest expected use temperature for 2-4 hours is recommended for optimal performance.

Cured Properties

Property LOCTITE STYCAST 2651 with LOCTITE CAT 11
Hardness (Shore D) 88
Water Absorption (24-hour boil, %) 0.1
Thermal Conductivity (W/m-K) 0.66
Coefficient of Thermal Expansion (ppm/°C) 40
Operating Temperature Range (°C) -55 to +155

Electrical Properties

Property Value
Volume Resistivity (ohm-cm) 5 × 10¹⁵
Dielectric Strength (kV/mm) 17.7
Dielectric Constant / Dissipation Factor @ 1 KHz 4.6 / 0.01

Mechanical Properties

Property Value (N/mm²) Value (psi)
Flexural Strength 103 15,000
Compressive Yield Strength 110 16,000
Tensile Strength 62 9,000

Outgassing Properties (ASTM E 595, 3h @ 100°C)

Property Value (%)
TML 0.63
CVCM 0.01

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