GSC Flame Retardant Thin Wall Heat Shrink Tube
GSC is a halogen-free, flame-retardant thin wall heat shrink tube for light-duty wire harnessing and busbar insulation; GSC/YG adds yellow/green striping for ground-lead identification.
- Insulation up to 3.3 kV
- MIL-I-23053/5 Class 2 & 3
- UL 224 (File No. E328193), 125°C VW-1
- CSA C22.2
Choose a size
Selection Chart
| Part number / size | Supplied I.D.(mm) | Recovered I.D.(mm) | Recovered wall thickness(mm) | Spools(m / spool) | Cut length 1.2 m(per box) |
|---|---|---|---|---|---|
| GSC 1.0/0.5 | 1.0 | 0.5 | 0.28 | 400 | 600 |
| GSC 1.5/0.75 | 1.5 | 0.75 | 0.32 | 400 | 600 |
| GSC 2.0/1.0 | 2.0 | 1.0 | 0.35 | 400 | 600 |
| GSC 2.5/1.2 | 2.5 | 1.2 | 0.44 | 400 | 600 |
| GSC 3.0/1.5 | 3.0 | 1.5 | 0.44 | 400 | 500 |
| GSC 4.0/2.0 | 4.0 | 2.0 | 0.44 | 400 | 250 |
| GSC 5.0/2.5 | 5.0 | 2.5 | 0.56 | 200 | 250 |
| GSC 6.0/3.0 | 6.0 | 3.0 | 0.56 | 200 | 200 |
| GSC 7.0/3.5 | 7.0 | 3.5 | 0.56 | 100 | 200 |
| GSC 8.0/4.0 | 8.0 | 4.0 | 0.56 | 100 | 175 |
| GSC 10.0/5.0 | 10.0 | 5.0 | 0.56 | 100 | 150 |
| GSC 12.7/6.35 | 12.7 | 6.35 | 0.56 | 100 | 120 |
| GSC 14.0/7.0 | 14.0 | 7.0 | 0.69 | 100 | 100 |
| GSC 16.0/8.0 | 16.0 | 8.0 | 0.69 | 100 | 100 |
| GSC 18.0/9.0 | 18.0 | 9.0 | 0.69 | 100 | 80 |
| GSC 20.0/10.0 | 20.0 | 10.0 | 0.78 | 100 | 65 |
| GSC 25.0/12.5 | 25.0 | 12.5 | 0.78 | 50 | 40 |
| GSC 30.0/15.0 | 30.0 | 15.0 | 0.87 | 50 | 30 |
| GSC 40.0/20.0 | 40.0 | 20.0 | 0.97 | 50 | 20 |
| GSC 50.0/25.0 | 50.0 | 25.0 | 0.97 | 25 | 15 |
| GSC 60.0/30.0 | 60.0 | 30.0 | 0.96 | 25 | 10 |
| GSC 70.0/35.0 | 70.0 | 35.0 | 1.10 | 25 | 10 |
| GSC 80.0/40.0 | 80.0 | 40.0 | 1.27 | 25 | 10 |
| GSC 100/50.0 | 100.0 | 50.0 | 1.17 | 25 | 5 |
Code for yellow/green striped tubes: GSC/YG. Standard colours: black, white, yellow, red, blue, green and yellow/green. Source: GALA GSC Thin Wall Flame Retardant Tube catalogue sheet, Issue 2, February 2026.
Material properties
Technical Specification
| Properties | Value | Standard |
|---|---|---|
| Physical | ||
| Tensile Strength | 9 N/mm² (Mpa) (min.) | ASTM D638 |
| Ultimate Elongation | 300% (min.) | ASTM D638 |
| Water Absorption | 0.15% (max.) | ASTM D570 |
| Specific Gravity | 1.4 | ASTM D792 |
| Longitudinal Change | -10% (max.) | ASTM D638 |
| Thermal | ||
| Operating Temperature | -55 °C to +125 °C | IEC 216 |
| Heat Shock (250 °C for 4 hrs.) | No dripping, cracking or flowing | |
| Low Temperature Flexibility (-55 °C for 4 hrs.) | No Cracking | ASTM D2671 |
| Flammability | Pass | UL224 VW-1 |
| Chemical | ||
| Fungus Resistance | Inert | MIL-1-7444 |
| Copper Corrosion | Good | ASTM D2671B |
| Chemical Resistance | Good | ASTM D2671 |
| Electrical | ||
| Dielectric Strength | >20kV/mm. | ASTM D2671 |
| Di-electric Constant | 3.0 (max.) | ASTM D150 |
| Volume Resistivity | 1 x 10¹³ Ohm.cm (min.) | ASTM D257 |
Source: GALA GSC Thin Wall Flame Retardant Tube catalogue sheet, Issue 2, February 2026.
Dimensions & Drawings
GSC is a halogen-free, flame-retardant thin-wall tube for light-duty wire harnessing and busbar insulation; the GSC/YG variant adds a yellow/green stripe for instant ground-lead identification.
Covered on this page
- Thin Wall Tubes
- GSC: Flame Retardant Tube
- GSC Series :
- GSC/YG Series :
Features & Benefits
- Halogen-free, flame retardant and self-extinguishing
- 2:1 shrink ratio
- Insulation up to 3.3 kV
- UV stabilised, RoHS compliant
- Seven standard colours including a yellow/green striped ground-lead variant
- GSC 1.0/0.5 to GSC 100/50.0 size range
Applications
- Light-duty wire harnessing for electrical and electronic equipment
- In-line component insulation and protection
- Strain relief for wire connections
- Busbar insulation for switchgear
- Wire, cable, terminal and component colour coding
- Ground-lead identification (GSC/YG)
Standards & Compliance
- MIL-I-23053/5 Class 2 & 3
- UL 224 (File No. E328193), 125°C VW-1
- CSA C22.2
FAQs
Frequently Asked Questions
What is the GSC Flame Retardant Thin Wall Heat Shrink Tube used for?
It is used for:
- Light-duty wire harnessing for electrical and electronic equipment
- In-line component insulation and protection
- Strain relief for wire connections
- Busbar insulation for switchgear
- Wire, cable, terminal and component colour coding
- Ground-lead identification (GSC/YG)
How do I choose the right size?
A heat-shrink part is chosen by two diameters. As supplied (Supplied I.D. (mm)) it must open wider than the largest thing it has to slide over; after shrinking (Recovered I.D. (mm)) it must close smaller than the smallest thing it has to grip. Measure both on your cable or busbar and pick the first code in the selection chart that satisfies both.
How is it installed?
Clean and degrease the surface, position the part, then shrink it with a gas torch or a hot-air gun: keep the heat moving round it with a smooth, brushing motion so it recovers evenly without scorching. Start at one end and work steadily along to the other.
Which standards and test methods are quoted for it?
These, with the values in the Technical Specification on this page:
- MIL-I-23053/5 Class 2 & 3
- UL 224 (File No. E328193), 125°C VW-1
- CSA C22.2
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.
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