3M™ Heat Shrink Tubing MW
Adhesive-Lined, 2.5:1, Semi-Rigid, Polyolefin
Data Sheet
Description
November 2018
3M™ Heat Shrink Tubing MW is a semi-rigid, 110ºC heat-shrinkable polyolefin tubing
that is co-extruded and selectively cross-linked to provide an integral, meltable inner
wall.
When heated in excess of 135ºC (275ºF), the inner meltable wall of the tubing is
simultaneously softened and forced by the shrink action into intimate contact with all
underlying surfaces, interstices and small voids. Upon cooling, the 3M MW tubing
provides a tough protective and insulating barrier, highly resistant to penetration by
moisture and the introduction of chemicals and solvents. Adhesive reflow will occur
at temperatures above 80ºC (176ºF).
Agency Approvals &
Self Certifications
Meets requirements of:
• AS23053/4, Class 1*
• UL Recognized, File E-157227
• For RoHS and REACH information, please visit www.3M.com/regs
*Formerly MIL-I-23053/4, MIL-DTL-23053/4 and SAE-AMS-DTL-23053/4
Applications
Applications for 3M MW tubing include braided-shield pigtails, electrical wiring,
mechanical assemblies, electronic components, electrical wire splices, breakouts,
connections, solder joints, delicate wire terminations, end-sealing of electrical cables
and rigid tubings.
For installation that may require rework, retrofit or repair in the field, 3M MW tubing
offers the extra advantage of easy removability. For circuit and component
identification purposes, the tubings readily accept marking by means of print-wheel
or hot-stamp techniques.
Shrink Ratio
3M MW tubing has a 2.5:1 shrink ratio. When fully recovered, the tubing will shrink
40% of its original diameter. The recovered wall thickness of the tubing is
proportional to the degree of recovery.
The operating temperature range is from -55ºC (-67ºF) to 110ºC (230ºF), with a
shrink temperature minimum of 135ºC (275ºF), and will withstand higher operating
temperatures for brief periods.
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3M™ Heat Shrink Tubing MW
Standard Sizes
and Dimensions
Ordering
Size
(Nominal)
1/8
3/16
1/4
3/8
1/2
3/4
1
Typical Properties
Expanded I.D.
(Minimum)
In.
.125
.187
.250
.375
.500
.750
1.000
(mm)
(3,18)
(4,75)
(6,35)
(9,53)
(12,70)
(19,05)
(25,40)
Recovered I.D.
(Maximum
In.
.023
.060
.080
.13
.195
.313
.400
(mm)
(0,58)
(1,52)
(2,03)
(3,43)
(4,95)
(7,95)
(10,16)
Total Recovered
Wall Thickness
(Nominal)
In.
.038
.043
.047
.050
.055
.065
.075
(mm)
(0,97)
(1,09)
(1,19)
(1,27)
(1,40)
(1,65)
(1,91)
Meltable
Recovered Wall
Thickness
In.
.020
.025
.027
.030
.035
.040
.040
(mm)
(0,51)
(0,64)
(0,69)
(0,76)
(0,89)
(1,02)
(1,02)
Not for specifications. Values are typical, not to be considered minimum or maximum.
Properties measured at room temperature 73°F (23°C) unless otherwise stated.
Physical Property
Tensile Strength
Ultimate Elongation
Longitudinal Change
Secant Modulus (2%)
Heat Aging (outer wall only)
168 hrs @ 175ºC
Heat shock (outer wall only)
4 hrs @ 250 ºC
Low Temperature Flexibility (outer wall only)
4 hrs @ -55 ºC
Electrical Property
Dielectric Strength
Volume Resistivity
Chemical Property
Corrosion Resistance
Fungus Resistance
Water Absorption
Fluid Resistance
JR4 Skydrol 600 Solution Gasoline
Hydraulic Fluid
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Typical Value
US units (metric)
2200 PSI
400%
+1, -10%
27,000 PSI
Elongation 175%
No dripping, flowing,
cracking
No cracking
Typical Value
US units (metric)
900 V/mil
1015 ohm/cm
Typical Value
US units (metric)
Non-corrosive
Non-nutrient
0.1%
>1500 PSI @ V/mil
@ 600 V/mil
3M™ Heat Shrink Tubing MW
Standard Colors
Black
Also available in Blue, Clear, Red, White and Yellow. Price, MOQ and Lead Time
will vary for these colors. Please contact Local Sales Representative or Customer
Service Representative for more information.
NOTE: The clear tubing is not flame retardant or UL listed.
Shelf Life & Storage
3M™ Heat Shrink Tubing MW has a 10-year shelf life from date of manufacture when
stored in a humidity controlled storage (10°C/50°F to 27°C/80°F and
