Technical Data Sheet
Vibra-Tite® 933
Epoxy
November 2012
Product Description
VIBRA-TITE 933 is a long working life, heat curing,
and two component formulation. It was designed
especially for potting high voltage coils. The
combination of low viscosity, excellent high
temperature electrical properties and good thermal
shock resistance makes this epoxy ideal for this
application.
Use:
The VIBRA-TITE 933 is best handled with automatic
mix/meter-dispensing equipment. The mixed
material is introduced into preheated coils under
vacuum. Depending on coil depth, pressure may be
applied to insure complete penetration of the system
into the coil windings. The potted coils are then
cured at elevated temperatures.
Process Description:
Summary of potting ignition coils:
1. Preheat coils to 105-100°C for 2 hours
2. Preheat the resin to 95-105°C
3. Preheat the hardener to 60-70°C
4. Vacuum both resin and hardener to 0.5 torr
5. Intorduce the epoxy system into coils under
vacuum of 1 torr
6. Subject the filled coils to vacuum of 1 torr
or less for 10 to 20 seconds
7. Cure using one of the following schedules:
a. 12 to 16 hours at 80-90°C
b. 2 hours at 90-95°C plus 2 hours at
115-125°C
c. 4 hours at 80-85°C plus 2 hours at
115-125°C plus 2 hours at 124155°C
Handling Properties:
Mix Ration (resin to hardener)
By Weight: 100:35
By Volume 100:48
Viscosity @25°C
Resin 50,000
cps
Hardener 80
cps
Mixed TBD
Weight/Gallon @25°C
Resin 13.8
Hardener 10.1
Working Life @25° C 1 -2 Days
Typical Cure Schedules
12-16 hours @ 80-
90°C
Or 2 hours @9095°C
Plus 2 hours
Physical Properties:
Hardness (Shore D) 92
Specific Gravity @25° C 1.54
Glass Transition Temp (Tg) 98° C
Coefficient of Thermal Expansion:
CLTE1: 57 μm/m/° C
CLTE2: 122μm/m/°C
General Information
Storage
Product should be stored in cool, dry conditions.
VIBRA-TITE 933 when un-mixed has a shelf life of
12 months when stored at 25°C. Storage in cool,
clean areas is recommended. Usable shelf life may
vary depending on method of applications and
storage conditions.
Note
The data are furnished for information only and are
believed to be reliable. We cannot assume
responsibility for the results obtained by others over
whose methods we have no control. It is
recommended that the product be tested in the
application for which it is to be used.
Technical data contained within this document is intended for reference only
For assistance and recommendations on specifications for this product, contact ND Industries
info@ndindustries.com
11/13/2012 Page 1 of 1
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