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W3B2(4X) Dual Wall Adhesive Lined
4 to 1 Ratio
Flexible Polyolefin
   
UL
  
VW-1 
  
CSA 
  
MIL SPEC
 
   
  Specification Reference
 
 UL 224, 125ºCm 600V
 
 File E75077 YDTU2, Cat. No. SUMITUBE W3B2(4X)
 
 
MIL-I-2503/4 Class 3 except longitudunal change
   
Rep
laces
Raychem
ATUM (4X)
   
   
   
   
Description
 
 
 
 
Uses
 
 
 
Operating Temp
 
Shrink Temp
 
Standard Put-up
 
   
  W3B2(4X) is an over-expanded flexible, flame retardant heat-shrinkable polyolefin
tubing with a thick wall of modified polyamide adhesive which melts and flows,
  encapsulatin and sealing components contained within.
   
  W3B2(4X) is recommended for applications requiring water-proofing for light cable
  and wire harnesses and protection of connector components. Its 4to 1 shrink
  ratio allows it to easily fit over irregular surfaces and large connectors.
  -55ºC, to +110ºC
  110ºC
  Bag - 4 foot lengths, packaged in plastic bags.
   
    Property (units)
Test Method
Test Method
Physical 
   Tensile Strength (psi)
ASTM D638
1500 MIN.
    Elongation (%)
ASTM D638
250 MIN.
    Cold Impact (-55ºC)
ASTM D746
No Cracking
    Heat shock (250ºC, 4 Hrs.)
MIL-DTL-23053
No Cracking
    Secant modulus (psi)
ASTM D882
25000 MAX.
    Longitudinal change (%)
MIL-DTL-23053
+1, -15
     
Electrical
  Dielectric strength (volts/mil)
ASTM D876
300 MIN.
  Volume resistivity (ohm-cm)
ASTM D876
1.0 x 10MIN
   
Chemical 
   Corrosion
UL 224
No Corrosion
 
   Water absorption (%)
ASTM D570
1.0 MAX.

  Fluid Resistance (23ºC, 24 Hrs.) Tensile Strength (psi)
MIL-DTL-23053
900 MIN.
  Flammability
UL 224
Pass
    Shrink Temperature (nominal)
110ºC

Inside
Post
Inside Diameter
Diameter
Shrink
Full
Before Shrinking
After
Wall
Spool
(minimum)
Shrinking
Thickness
Length
Price
Color Selection
(maximum)

mm


inches

mm
(inches)

mm
(inches)


in feet

per bag
per foot
BK
BR
RD
OR
YL
GN
BL
VI
GY
WH
CL
4 -
0.1574		 0.9906 (0.039) 1.016 (0.040) 200 399.50
2.35
8 -
0.3149		 2.0066 (0.079) 1.2192 (0.048) 100 303.45
3.57
12 -
0.4724		 2.9972 (0.118) 1.397 (0.055) 100 373.15
4.39
16 -
0.6299		 3.9878 (0.157) 1.8034 (0.071) 100 629.00
7.40
24 -
0.9448		 5.9944 (0.236) 2.2606 (0.089) 60 507.45
9.95
32 -
1.2598		 8.001 (0.315) 2.540 (0.100) 40 563.72
16.58

* Some types of heat shrink, for instance semi-rigid and dual wall types are manufactured in 4 foot lengths. the rigid and semi-rigid ones do not bend without kinking, the adhesives in dual walls tend to stick or block shut when spooled.

4 foot lengths, packaged in plastic pags.

Lead Time:
1 day

Lead Time:
up to 50 days

Lead Time:

up to 100 days

Lead Time:

up to 200 days

Not Possible
 


The above lead time guidelines are estimated only. They may be longer (not usually) or they may be shorter (typically). Regarding products with 100 & 200 day lead time; pricing may vary, and a
minimum order with deposit may be required. Oh... and by the way, everything can
change without notice and/or liability.