Heat Shrink Sleeve-Rubber-Polyolefin

Heat Shrink Sleeves & Rubber Insulation Tubing
Heat shrink sleeves are flexible polymer tubes that shrink tightly around cables, busbars, terminals and connectors when heated, forming a durable, moisture-tight electrical insulation. GoSwitchgear stocks the KableKonnect / RRE rubber-polyolefin range from Ø2 mm to Ø150 mm in seven standard colours, rated up to 600 V (HD-2 series) and 3.3 kV (RRE rubber series), all with a 2:1 shrink ratio, halogen-free, flame-retardant and RoHS-compliant.

How to choose the right size
The sleeve should shrink to a snugly smaller size than the cable, busbar or terminal you are covering. A 2:1 ratio means the sleeve shrinks to half its expanded diameter — so pick a size whose after-shrinking ID is slightly less than the outside diameter of the object being insulated. Use the reference table below or filter by Cable Size (mm²) above.

Size & Cable Reference (RRE / KableKonnect)

Size (before / after ID)Cable SizeBusbar Size (mm)

2/1 mm1 mm²—
3/1.5 mm1.5 mm²—
4/2 mm1.5 mm²—
5/2.5 mm2.5 mm²—
6/3 mm4 mm²—
8/4 mm10 mm²—
10/5 mm16 mm²10×5
12/6 mm25 mm²12×5
14/7 mm35 mm²15×5
15/7.5 mm35/50 mm²15×5, 15×10
16/8 mm50 mm²15×10
18/9 mm70 mm²20×5
20/10 mm95 mm²20×10
25/12.5 mm120 mm²30×5
30/15 mm150 mm²30×10, 40×5
35/17.5 mm185 mm²40×10
40/20 mm240 mm²50×5, 50×10
50/25 mm300 mm²60×10
60/30 mm400 mm²70×10
70/35 mm500 mm²80×10, 80×20
80/40 mm800 mm²100×10
100/50 mm1000 mm²120×10

Common Uses

Cable & splice insulation — seals joints against moisture, dust and abrasion.
Busbar insulation — colour-codes phases (R/Y/B) inside LV panels and switchgear.
Terminal & lug covering — dielectric barrier over crimped connections.
Cable identification — 7 colours plus Yellow/Green earth for site labelling.
Strain relief — reinforces flex points at connector exits.
Chemical & UV protection — resists oils, coolants, sunlight and copper corrosion.

General properties

Halogen-free, flame-retardant and self-extinguishing (FT2)
Electrical insulation up to 3.3 kV (RRE rubber) / 600 V (HD-2 polyolefin)
Resistant to chemicals, copper corrosion and fungus
UV-stabilised for indoor and outdoor use
Shrink ratio 2:1; standard colours: Black, Red, Blue, Yellow, White, Green, Yellow/Green, Brown, Grey, Clear
Meets RoHS and SGS compliance