Shareware 321C(Self-fusing rubber mastic tape) is a conformable self-fusing rubber electrical insulating and sealing tape.

Shareware 321C (Self-fusing rubber mastic tape)is a conformable self–fusing rubber (Butyl rubber) electrical insulating and sealing tape. It is designed for electrical insulating and moisture sealing applications. Shareware 321C can be used on copper or aluminum conductors rated at 90°C, with an emergency overload rating of 130°C. It offers excellent resistance to moisture and ultraviolet exposure and is intended for both indoor and weather exposed outdoor applications.

Tape Features:

* Conformable for application over irregular surfaces

* Compatible with solid dielectric cable insulations

* Self–fusing tape

* Flexible over wide temperature range

* Excellent weather and moisture resistance

* Excellent adhesion and sealing characteristics with copper, aluminum and power cable jacket materials.

* Thick construction allows quick application build–up and padding over irregular connections

Applications:

* Primary electrical insulation for cable and wire connections rated up to

1000 volts

* Electrical insulation and vibration padding for motor leads rated up to 1000 volts

* Primary electrical insulation for bus bar connections rated up to 35 kv

* Padding for irregular shaped bus bar bolted connections

* Moisture seal for cable and wire connections

* Moisture seal for service drops

* Moisture seal for ground wire and rod connections

* Jacket seal on power cable applications

Typical Data:

Temperature Rating:   ASTM D–4388    194°F (90°C)

Color               Black

Thickness            ASTM D–4325    1,58 mm)

Fusion               ASTM D–4388,    Type I Pass

Tensile Strength       ASTM D–4325     1,70N/mm2)

Elongation           ASTM D–4325     560%

Dielectric Breakdown  ASTM D–149     Dry 18,1kv/mm)

Dielectric Constant    ASTM D–150     0.0071

Water Absorption     ASTM–570        0.06%

Ozone Resistance     ASTM D–1149      Pass

Heat Resistance      ASTM D–4388      Pass, 96°C 

UV Resistance        ASTM D–4892       Pass

Note: These are typical values and should not be used for specification

purposes.

Specification:

3281C tape shall be 65 mils (1,55 mm) thick. The tape must be ethylene propylene rubber based and coated with a rubber mastic pressure sensitive adhesive. The tape must be classified for normal service temperatures up to 90°C with allowable short–term exposure

up to 130°C.

 

321C tape must be applicable at temperatures of 0°C to 38°C without loss of physical properties. The tape must be classified for use in both indoor and weather–exposed outdoor environments. The tape must not split or crack when exposed to normal operating temperatures and environments. The tape must be compatible with synthetic cable and wire insulations. The tape shall not be corrosive to aluminum, or copper

conductors.

Installation:

Shareware 321C should be applied in half–lapped layers until desired insulation build up is reached. Stretch the tape to 3/4 of its original width during application for good conformability and to obtain a moisture tight seal.

Shareware 321C should be overwrapped for mechanical protection with two half–lapped layers of vinyl electrical tape.

 

Shelf Life:

Shareware 321C tape has a five year shelf life (from date of manufacture) when stored under the following recommended storage conditions.

Store behind present stock in a clean, dry place at a temperature of 70°F (21°C) and 40–50% relative humidity. Good stock rotation is recommended. 

 

321C rubber mastic tape (Butyl rubber)(Self-fusing rubber mastic tape)