Cut Sheet

78-8126-5772-0-BPage 3 of 4
Typical Properties
3M
™
Scotchcast
™
Electrical Insulating and Sealing Compound 2104
Property Test Method Typical Value
Tensile Strength ASTM-D-412 600 psi (4.14 MPa)
Elongation ASTM-D-412 150%
Hardness Shore A 70
Apparent Free Isocyanate Distill 15 min. at 170°C (338°F) and 3mm mercury vacuum 3.5%
Distill 15 min. at 77°C (171°F) and 3mm mercury vacuum <0.1%
Viscosity Brookfield at 20 rpm 1200 cps
Gel Time 180 gm sample at 23°C (73°F) 15 min.
Exotherm 180 gm sample at 24°C (75°F) 66°C (150°F) max.
Water Absorption 7 days in 23°C (73°F) water 0.28%
Insulation Resistance Aged 28 days/35°C (95°F) 96% RH 5 x 10
10
ohms
Dielectric Constant ASTM-D-150 4.1 at 10
3
Hz
3.8 at 10
6
Hz
Dissipation Factor ASTM-D-150 0.04 at 10
3
Hz
0.05 at 10
6
Hz
Hydrolytic Stability 7 days in water at 100°C (212°F) +2.4%
-10 points Shore A hardness
Dry Heat Aging 21 days at 132°C (270°F) -4.7% wt. loss + 10 Shore A
Copper Corrosion 30 days at 35°C (95°F), 96% RH under 45 V 0
Stress Cracking On cut and stressed polyethylene for 48 hours/49°C (120°F) 0
Fungus Resistance ASTM-G-21 0
Specification
Product
(open specification)
Signal and control cable splices must be capable of
normal continuous operation at 1000 volts. The splices
must consist of a rigid polypropylene mold body with
a built-in spacer web to automatically provide for cable
centering and proper compound coverage; the mold body
shall be filled with a flexible polyurethane electrical
compound capable of continuous operation at 90°C
(194°F), with an emergency overload temperature rating
of 130°C (266°F).
Splices must have provisions for inline splicing of
shielded or unshielded, plastic or rubber jacketed, plastic
or rubber insulated, signal and control cables. The splices
shall be rated for direct burial applications.
Engineering/Architectural
(closed specification)
Splicing of all signal and control cables rated at 1000
volts or less and sized with an outside diameter of
0.25"–3.25" (6.4–82.6 mm) shall be performed in
accordance with the instructions provided with 3M
Scotchcast Signal and Control Cable Inline Splicing Kit
72-N Series.
Installation Techniques
The exact instructions for constructing each splice are
packed in each kit. The following summarizes these
instructions:
1. Prepare cable to dimension “A” for splice opening,
removing shielding and core wrapper according to steps
for shielded cable or unshielded cable, as applicable.
2. Install 3M
™
Scotchlok
™
Insulated Butt Connectors, not
provided, staggering individually or in pairs. Observe
color coding.
3. Install jumper bonding wire to shielded cables; construct
sealing collars with Scotch
®
Rubber Tape 23 provided.
4. Trim mold body ends to fit cable and install over splice.
5. Seal mold ends with Scotch Tape 23 provided.
6. Install pour spouts into kits 72-N1, 72-N2 and 72-N3.
7. Mix 3M Scotchcast 2104 compound and pour into splice
body, filling completely. Allow compound to cure.
Maintenance
The components within this kit are stable under normal
storage conditions. Normal storage and stock rotation are
recommended.
The 2104 compound is not impaired by freezing; however,
it should be warmed to 0°C (32°F) before being mixed and
poured.
Availability
3M Scotchcast Inline Splicing Kits 72-N Series are
available in six sizes from your local 3M authorized
electrical distributor. The kits will splice signal and control
cables sized 0.25"–3.25" (6.4–82.6 mm) outside diameter,
as shown in the splice selection guide table.