5051 Epoxy

A low viscosity, optically clear epoxy

An electrically isolating epoxy compound, 5051 bonds well to most substrates such as metals, glass, ceramics, and most plastics. The material is free flowing, making it ideal for potting and underfill applications.

This product will exotherm if cured at high temperatures in masses greater than 5 grams. Contact Appli-Tec for step cure instructions if curing in larger masses.


Work Life @ 25°C8 hours
Mixed Viscosity @ 25°C320 cPs
Pot Life @ 25°C4 hours
Shelf Life12 months @ 25°C (2‐part Kits) 12 months @ ‐40°C (Cryo‐Pac®)
Mix Ratio100A : 34.5B Parts By Weight

Cure Options

6 hours @ 80°C 8 hours @ 65°C 8 days @ 25°C

Cured Properties

Based on cure of 6 hours @ 80°C

Shore D Hardness83
Glass Transition Temp (°C)85
Lap Shear 2024T3 Clad (psi)3,300
Density (g/cc)1.15
Refractive Index1.56
Shrinkage Linear (%)0.2

Electrical Properties

Based on cure of 6 hours @ 80°C

Dielectric Constant3.013 @ 60 Hz 3.052 @ 1k Hz 2.846 @ 100k Hz
Dissipation Factor0.0061 @ 60 Hz 0.0118 @ 1k Hz 0.0382 @ 100k Hz
Volume Resistivity (ohm‐cm)1.7E 16 @ 500 VDC

Thermal Properties

Based on cure of 6 hours @ 80°C

Glass Transition Temp (°C)85
Degradation Temp. (°C)250

Outgassing Properties

Based on cure of 6 hours @ 80°C

TML (%)0.58
CVCM (%)0.01
WVR (%)0.26

Acoustic Properties

Based on cure of 6 hours @ 80°C

Velocity (m/s)2,645
Impedance (MRayls)3.05
Loss (dB/cm-MHz)-6.2
Density (g/cc)1.15

Key Features

  • Bonds Well to Most Substrates
  • Free Flowing
  • Low Outgassing
  • Wicks Easily Into Tight Spaces
  • Long Work Life
  • Low Viscosity
  • Optically Clear
  • User‐friendly Packaging

The data contained herein is provided for informational purposes only and are believed to be reliable. APPLI-TEC does not guarantee suitability of this product for any resultant application or freedom from patent infringement. Furthermore, APPLI-TEC disclaims any liability for incidental and consequential damages of any kind including but not limited to lost profits.

Rev F

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