Heat-Shrink & Cold-Shrink Sleeves

Heat Shrink
Heat shrink tubing is a type of extruded plastic tube that reduces in size when heated to a pre-determined shrink ratio to fit a specific application. A sleeve should be selected in a size larger than required to cover both the wire and components it is to be used with, before being shrunk to fit. Once fitted, the sleeve provides long lasting durability.

Materials and Types
Heat shrink is available in various different materials, colours, sizes and shrink ratios to suit the application required. Some are available with an adhesive lining that helps to bond the tubing with the cables and components.
Polyolefin is the most common material as it is highly durable and can withstand high temperatures without a restricted shelf life. They are also manufactured from PVC, fluoropolymer, neoprene and elastomeric materials. The material is often cross linked to assist with the tubing shrinking back to its original dimensions.
The pre-determined shrink ratio, for example, 2:1 or 3:1, is the measurement of how small the sleeve goes in comparison to its expanded size. When the number is higher in the shrink ratio the greater the shrinkage. It allows a precise, secure fit that does not come off easily.
Applications
Heat shrink tubing is versatile and easy to use therefore it can be applied in an assortment of applications, the most common uses being:
• Electrical insulation – covering joints and repairs
• Strain relief – relieving pressure from the cable
• Wire bundling – in harness building and cable organisation
• Environmental and mechanical protection – preventing damage from abrasion, moisture, dust and chemicals
• Identification – the wide range of colours the tubing is manufactured in allows it to be used for colour coding and component ID
Installation
When selecting the right size tubing, you should consider the maximum and minimum diameter of what you are covering. Use this information to check against the recovered diameter (the diameter after shrinking) and expanded diameter (the pre-shrinkage diameter) of the sleeve.

You can cut most tubing to a suitable length using standard scissors. The unshrunk tubing can be slid over the area or objects it is to cover. Then with a hand held heat gun or heat shrink oven, the sleeve is shrunk tightly. To prevent uneven shrinkage or overheating, check the recommended heating temperature beforehand.

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Description Price Sleeve Diameter Shrunk Diameter Colour Sleeve Type Adhesive Lined Shrink Ratio Sleeve Length Material Flame Retardant Halogen Free Series Standards Met
RS Stock No. 818-7978
Mfr. Part No.91-WT31-0442
BrandKroy
$180.65
Each
units
4.8mm - White Heat Shrink - 3:1 55m Polyolefin Yes - - -
RS Stock No. 818-7922
Mfr. Part No.98-WT21-0442
BrandKroy
$36.94
Each
units
4.8mm - White Heat Shrink - 2:1 30m Polyolefin Yes - - -
RS Stock No. 818-7969
Mfr. Part No.98-YT21-1242
BrandKroy
$56.63
Each
units
12.7mm - Yellow Heat Shrink - 2:1 30m Polyolefin Yes - - -
RS Stock No. 818-7975
Mfr. Part No.91-WT31-0342
BrandKroy
$165.58
Each
units
3.2mm - White Heat Shrink - 3:1 55m Polyolefin Yes - - -
RS Stock No. 818-7944
Mfr. Part No.98-YT21-0342
BrandKroy
$32.79
Each
units
3.2mm - Yellow Heat Shrink - 2:1 30m Polyolefin Yes - - -
RS Stock No. 818-7928
Mfr. Part No.98-WT21-0342
BrandKroy
$32.79
Each
units
3.2mm - White Heat Shrink - 2:1 30m Polyolefin Yes - - -
RS Stock No. 818-8004
Mfr. Part No.91-YT31-1242
BrandKroy
$381.19
Each
units
12.7mm - Yellow Heat Shrink - 3:1 55m Polyolefin Yes - - -
RS Stock No. 818-7956
Mfr. Part No.98-YT21-0642
BrandKroy
$42.26
Each
units
6.4mm - Yellow Heat Shrink - 2:1 30m Polyolefin Yes - - -
RS Stock No. 818-7947
Mfr. Part No.98-WT21-1942
BrandKroy
$95.01
Each
units
19.5mm - White Heat Shrink - 2:1 30m Polyolefin Yes - - -
RS Stock No. 818-7934
Mfr. Part No.98-WT21-0942
BrandKroy
$54.32
Each
units
9.5mm - White Heat Shrink - 2:1 30m Polyolefin Yes - - -
RS Stock No. 818-7962
Mfr. Part No.98-YT21-1942
BrandKroy
$89.50
Each
units
19.5mm - Yellow Heat Shrink - 2:1 30m Polyolefin Yes - - -
RS Stock No. 818-7938
Mfr. Part No.98-WT21-1242
BrandKroy
$56.63
Each
units
12.7mm - White Heat Shrink - 2:1 30m Polyolefin Yes - - -
RS Stock No. 818-7984
Mfr. Part No.91-WT31-1242
BrandKroy
$381.19
Each
units
12.7mm - White Heat Shrink - 3:1 55m Polyolefin Yes - - -
RS Stock No. 818-7931
Mfr. Part No.98-WT21-0642
BrandKroy
$43.13
Each
units
6.4mm - White Heat Shrink - 2:1 30m Polyolefin Yes - - -
RS Stock No. 818-7953
Mfr. Part No.98-YT21-0442
BrandKroy
$43.95
Each
units
4.8mm - Yellow Heat Shrink - 2:1 30m Polyolefin Yes - - -
RS Stock No. 818-7994
Mfr. Part No.91-YT31-0442
BrandKroy
$180.65
Each
units
4.8mm - Yellow Heat Shrink - 3:1 55m Polyolefin Yes - - -
RS Stock No. 818-7972
Mfr. Part No.91-WT31-0642
BrandKroy
$223.12
Each
units
6.4mm - White Heat Shrink - 3:1 55m Polyolefin Yes - - -
RS Stock No. 818-7981
Mfr. Part No.91-WT31-0942
BrandKroy
$303.60
Each
units
9.5mm - White Heat Shrink - 3:1 55m Polyolefin Yes - - -
RS Stock No. 818-7950
Mfr. Part No.98-YT21-0942
BrandKroy
$52.21
Each
units
9.5mm - Yellow Heat Shrink - 2:1 30m Polyolefin Yes - - -
RS Stock No. 818-7940
Mfr. Part No.98-WT21-2542
BrandKroy
$161.88
Each
units
25.4mm - White Heat Shrink - 2:1 30m Polyolefin Yes - - -