SUMITUBE™ W3C

CatalogNo.842

[Dual wall heat-shrinkable tubing with meltable adhesive for waterproofing of irregular-shaped objects]

■ Watertight sealing with good adhesion to metals, polyolefin and PVC
■ Flexible
■ Thicker adhesive (than SUMITUBE™ O2C)
✔RoHS directive 10 substances

Applications

■ Waterproof sealing for electronic devices with irregular shapes
■ Encapsulation for wire branches
■ Insulation and protection of wire joints

Basic Properties

Category	Heat shrink tubing
Material	Outer: Irradiated cross-linked flexible polyolefin Inner: Meltable adhesive
Flammability	Non Flame Retarded
Shrink temperature	min. 115℃
Shrink ratio	min. 60%
Longitudinal change	min. -15%
Continuous operating temperature	-55 to 105℃
Specifications/Approvals	SFP standard (RE4-2081)
Marking on Surface	―
Available colors	Black, Clear
Flexibility	Flexible
Environmental Compliance	RoHS,ELV
Industry	Automotive,Construction machinery,Industrial machinery,Electronics

Gasoline	Gas oil	Lubricant	Alcohol	Acid	Alkali
○	○	○	○	○	△

Gasoline

Gas oil

Lubricant

Alcohol

Acid

Alkali

○

△

Features

Properties	Items	Requirements	Typical values*1
Mechanical	Tensile strength (before aging)² Tensile strength (after aging)² Elongation (before aging) Elongation (after aging)	min. 10.4MPa 136℃ x 7 days, min. 7.3MPa min. 200% 136℃ x 7 days, min. 100%	13.9MPa 12.9MPa 562% 500%
Electrical	Dielectric withstand Volume resistivity	AC2.5kV x 60 sec., no breakdown min. 1.0 x 10¹⁴Ω・cm	Pass 1.6 x 10¹⁶Ω・cm
Chemical	Corrosion against bare copper Flammability	121℃ x 16 hours, no corrosion Flammable	Pass ―

Properties

Items

Requirements

Typical values*1

Mechanical

Tensile strength      (before aging)*²
Tensile strength      (after aging)*²
Elongation                (before aging)
Elongation                (after aging)

min. 10.4MPa
136℃ x 7 days, min. 7.3MPa
min. 200%
136℃ x 7 days, min. 100%

13.9MPa
12.9MPa
562%
500%

Electrical

Dielectric withstand
Volume resistivity

AC2.5kV x 60 sec., no breakdown
min. 1.0 x 10¹⁴Ω・cm

Pass
1.6 x 10¹⁶Ω・cm

Chemical

Corrosion against bare copper
Flammability

121℃ x 16 hours, no corrosion
Flammable

Pass
―

*1: For reference use only *2: Calculated by using outer cross section

Sizes

Trade size（inch）	As supplied（mm）		After recovered（mm）			Unit length（min.）（m）
Trade size（inch）	Inside diameter（min.）	Wall thickness＊（nom.）	Inside diameter（max.）	Wall thickness＊（nom.）	Adhesive thickness（nom.）	Unit length（min.）（m）
1/8	3.20	0.35	0.60	0.95	0.35	1.22
3/16	4.80	0.45	1.50	1.10	0.60	1.22
1/4	6.4	0.45	2.00	1.20	0.65	1.22
3/8	9.5	0.50	3.00	1.30	0.65	1.22
1/2	12.7	0.55	4.00	1.40	0.75	1.22
3/4	19.1	0.65	8.0	1.60	0.80	1.22
1	25.4	0.75	10.2	1.90	0.80	1.22

*: Including inner adhesive