Optically Clear Epoxy
Encapsulating and Potting Compound
8321C

M.G. Chemicals has successfully formulated an optically clear epoxy that can be cured with or without heating. It is tough, water and chemical resistant, an electrical insulator, and has excellent machining properties. Excellent for potting LED lights for maximum light transmission and electronic assemblies where component identification is desirable.

• Water clear potting
• Non-porous, water and chemical resistant
• Extremely impact resistant
• Electrically insulative
• RoHS Compliant

Specifications

Uncured Properties - Resin [Part A] Color   Optically Clear Viscosity @ 25°C Brookfield 30 RPM 900 cps (0.900 Pa·s) Density   1.140 g/mL Flash Point   95 °C (203 °F) Odor   Mid Uncured Properties - Hardener [Part B] Color   Optically Clear Viscosity @ 25°C Brookfield 30 RPM 10 cps (0.010 Pa·s) Density   0.946 g/mL Flash Point   125 °C (225 °F) Odor   Amine like Uncured Properties – Mixed (3 Part A:1 Part B) Color   Optically Clear Viscosity @ 25°C Brookfield 30 RPM 260 cps (0.260 Pa·s) Density   1.09 g/mL Mix Ratio by volume (A:B)   3.0:1.0 Mix Ratio by weight (A:B)   3.6:1.0 Solids Content (w/w)   ~92% Curing Schedule Curing Time (100 g) @ 25°C / 77 °F 4 days   @ 80°C / 176 °F 2 hours Working time   2 - 3 hours Cured - Physical Properties Density (at 26 °C) ASTM D695 1.153 g/cm3 Hardness (shore D)   76-78 Lap Shear Strength ASTM D1002 41.5 kg/cm2 Compression Strength ASTM D695 935 kg/cm2 Flexual Strength ASTM D790 871 kg/cm2 Outgasing (Total Mass Loss) ASTM E 595 7.62% Total Reflectance for 350–700 nm & 0.25‖ thick sample ASTM E 595 10% Cured - Electrical Properties Breakdown Voltage ASTM D149-09 60.6 kV @ 0.139" thickness  Dielectric Strength ASTM D149-09 436 V/mil @ 0.139" thickness  Surface Resistivity @ 24°C/30%RH ASTM D257 > 1 x 1017 Ohms/square Volume Resistivity @ 24°C/30%RH ASTM D257 2 x 1016 Ohms·cm Dielectric constant, K/ Dissipation Factor, D ASTM D150-98   @ 60 Hz   3.37 / 0.012 @ 1 KHz   3.33 / 0.011 @ 10 KHz   3.27 / 0.014 @ 100 KHz   3.19 / 0.017 @ 1 MHz   3.13 / 0.019 Cured - Thermal Properties Coefficient of thermal expansion ASTM E831   CTE prior Tg   83.0 ppm/°C CTE after Tg   236 ppm/°C Glass Transition Temperature (Tg) ASTM D3418 41 °C / 106 °F Cured Properties - Reflectance Total Reflectance in the 350-700 nm Range   10%

Available Sizes

Catalog Number Sizes Available Description 8321C-320ML 320 mL (10.8 fl. oz.) Liquid 8321C-4L 4 L (1 gallon) Liquid