SCL
Semirigid, encapsulant-lined,
heat-shrinkable tubing
SCL is encapsulant-lined, heat-
shrinkable tubing that provides
moisture resistance, strain relief,
and electrical insulation for electrical
splices, terminations, breakouts,
and mechanical connections.
SCL is constructed as a dual-wall
tubing. The outer wall is a semirigid,
crosslinked polyolefin, while the inner
wall is a meltable polyolefin that flows
with the application of heat.
Heating SCL shrinks the outer jacket
and melts the inner “encapsulant”
wall to flow and fill surface
irregularities. While still hot, the
tubing can be pinched and blocked
to form a wire breakout. SCL
provides a splash-resistant,
moisture-resistant covering suitable
for many applications. SCL also
performs satisfactorily if briefly
exposed to common solvents
or chemicals.
The installed tubing provides rugged
protection against abrasion, vibration,
and flexing. A wide range of
applications can be accommodated
with only a few sizes of SCL tubing.
SCL tubing is UL-recognized at
125°C, 600 V, and meets the
requirements of AMS-DTL-23053/4,
Class 1.
Temperature rating
Full recovery temperature: 135°C
Continuous operating temperature: –55°C to 110°C
Specifications*
Type Raychem Military UL
SCL RT-1301 AMS-DTL-23053/4, Class 1 E85381
* When ordering, always specify latest issue.
Dimensions (millimeters/inches)
Inside diameter Recovered wall thickness
Additional D (min.) d (max.) W W1 (nom.)
standard Expanded as Recovered after Total Meltable
Size color supplied heating wall** wall
1/8 Brown 3.2 0.125 0.6 0.023 0.96 ± 0.15 0.038 ± 0.006 0.51 0.020
3/16 Gray 4.7 0.187 1.5 0.060 1.09 ± 0.15 0.043 ± 0.006 0.64 0.025
1/4 White 6.4 0.250 2.0 0.080 1.19 ± 0.15 0.047 ± 0.006 0.69 0.027
3/8 Red 9.5 0.375 3.4 0.135 1.27 ± 0.18 0.050 ± 0.007 0.76 0.030
1/2 Blue 12.7 0.500 5.0 0.195 1.39 ± 0.18 0.055 ± 0.007 0.89 0.035
3/4 Yellow 19.1 0.750 8.0 0.313 1.65 ± 0.18 0.065 ± 0.007 1.01 0.040
1 N/A 25.4 1.000 10.2 0.400 1.90 ± 0.18 0.075 ± 0.007 1.01 0.040
**Wall thickness will be less if tubing recovery is restricted during shrinkage.
Ordering information
Standard colors Black for all sizes, plus one additional color per size as per dimensions table
Size selection Always order the largest size that will shrink snugly over the component being covered.
Standard packaging 4-foot lengths
Ordering description Specify product name, size, and color; for example, SCL1/4-0 (0=Black).
