Cold Shrink Tubing
Cold Shrink Tubing is an open-ended EPDM rubber sleeve, factory-expanded on a removable core, that seals cable joints and terminations up to 1100 V without heat or tools.
- ANSI C119.1
- ASTM D-412
- ASTM D-624C
.jpg)
.jpg)
Installation instructions
Full dimensional specifications and technical data, ready to download.
Choose a size
Selection Charts
- Ds (min.)
- Minimum internal diameter as supplied
- Df (max.)
- Maximum internal diameter after free recovery
- Lf
- Length after free recovery
- Tf (±10%)
- Wall thickness after free recovery
- Application range
- Cable or connector outside diameter the tube fits
| Code No. | Ds(min.) | Df(max.) | Lf(max.) | Tf(±10%) | Application Range |
|---|---|---|---|---|---|
| GCTE 20/7 | 20 | 7 | 500 | 3.4 | 8 - 15 |
| GCTE 25/9 | 25 | 9 | 500 | 3.6 | 10 - 20 |
| GCTE 35/11 | 35 | 11 | 500 | 3.6 | 12 - 30 |
| GCTE 40/13 | 40 | 13 | 500 | 3.6 | 14 - 33 |
| GCTE 53/16 | 53 | 16 | 500 | 3.6 | 17 - 46 |
| GCTE 70/20 | 70 | 20 | 500 | 3.6 | 21 - 63 |
| GCTE 104/28 | 104 | 28 | 500 | 3.8 | 29 - 94 |
| GCTE 125/34 | 125 | 34 | 500 | 3.8 | 35 - 115 |
| GCTE 150/41 | 150 | 41 | 500 | 3.8 | 42 - 141 |
D: diameter · s: as supplied · f: after free recovery. Source: GALA Cold Shrink EPDM Tubing catalogue sheet, Issue 1, March 2026.
Cold shrink EPDM tube (GCTE), high shrink ratio
| Code No. | Ds(min.) | Df(max.) | Lf(min.) | Tf(±10%) | Application Range |
|---|---|---|---|---|---|
| GCTE 40/9 | 40 | 9 | 500 | 4.0 | 10 - 33 |
| GCTE 70/17 | 70 | 17 | 500 | 4.0 | 18 - 63 |
| GCTE 80/19 | 80 | 19 | 500 | 4.0 | 20 - 73 |
D: diameter · s: as supplied · f: after free recovery. Source: GALA Cold Shrink EPDM Tubing catalogue sheet, Issue 1, March 2026.
Material properties
Technical Specification
| Properties | Test Methods | Typical Value |
|---|---|---|
| Colour | Visual | Black |
| 300% Modulus | ASTM D-412 | 3.3 MPa |
| Tensile Strength | ASTM D-412 | 9.6 MPa |
| Ultimate Elongation | ASTM D-412 | 750% |
| Die C Tear | ASTM D-624C | 26.3 kN/m |
| Fungus Resistance | ASTM G-21 | 28 days exposure, no growth |
Source: GALA Cold Shrink EPDM Tubing catalogue sheet, Issue 1, March 2026.
Dimensions & Drawings
Open-ended, tubular rubber sleeves, factory expanded and assembled onto a removable core. Position the tube over the inline connection or terminal lug, remove the core, and the tube shrinks to form a water-resistant seal.
Made from EPDM rubber, which does not contain chloride or sulfur. Seven diameter sizes cover copper and aluminium conductor up to 1000 sq.mm at up to 1100 V.
Features & Benefits
- Water-resistant seal meeting ANSI C119.1, dielectric strength 14.3 kV/mm (ASTM D149)
- No torches, tools or heat required — installs by pulling the removable core
- Seven sizes (GCTE 20/7 to GCTE 104/42) cover an 8-94 mm application range
- Operating temperature range -40°C to 105°C
- EPDM rubber, free of chloride and sulfur
- Resists abrasion, ozone, fungus, acids and alkalis
- Tough rubber formulation withstands backfilling
Applications
- Sealing inline cable connections and terminal lugs up to 1.1 kV
- Low-voltage cable joints for copper and aluminium conductors up to 1000 sq.mm
Standards & Compliance
- ANSI C119.1
- ASTM D-412
- ASTM D-624C
- ASTM G-21
- ASTM D149
FAQs
Frequently Asked Questions
What is the Cold Shrink Tubing used for?
It is used for:
- Sealing inline cable connections and terminal lugs up to 1.1 kV
- Low-voltage cable joints for copper and aluminium conductors up to 1000 sq.mm
How do I choose the right size?
Measure the outside diameter of the cable and choose the code whose "Application Range" covers it. For example, GCTE 53/16 fits a cable of 17–46 mm. Where two ranges overlap, either code fits.
How is it installed?
No heat and no tools. Place it over the cable, then pull and unwind the spiral support core: it shrinks onto the cable as the core comes out. Remove the core completely so it recovers fully.
Which standards and test methods are quoted for it?
These, with the values in the Technical Specification on this page:
- ANSI C119.1
- ASTM D-412
- ASTM D-624C
- ASTM G-21
- ASTM D149
Where can I download the datasheet?
From the "Download datasheet" button at the top of this page, or here:
Can I get a quote, a sample or a size that is not listed?
Send your cable details, quantity and application with the "Request a Quote or Sample" form at the foot of this page. For a size or variant that is not in the chart, describe what you need there, or use Technical support at the top of the page, and the technical team will confirm what can be supplied.
.jpg)
.jpg)
47+
Years manufacturing
100+
Countries served
140
Products in range
ISO 9001:2015
Certified & tested