Insulcap Heat Shrink Cable End Sealing Caps
Insulcap is Gala's cross-linked polyolefin heat shrink end cap that seals cable ends against water and moisture ingress, in valved, relief-valve degassing and live-cable sealing variants.
- Meets IP68 Ingress Protection
- ASTM D638
- ASTM D792
- ASTM D2240
More datasheets
Full dimensional specifications and technical data — download the sheet for your size.
Choose a size
Selection Chart
- Ds (min.)
- Minimum internal diameter as supplied
- Df (max.)
- Maximum internal diameter after free recovery
- Ls (min.)
- Minimum length as supplied
- Tf
- Wall thickness after recovery (±10%)
- Cable range
- Cable outside diameter the cap fits
| Code | Ds(min) | Df(max) | Ls(min) | Tf(±10%) | Cable range |
|---|---|---|---|---|---|
| GEC 001 S | 6 | 2 | 25 | 2.0 | 2.5–4 |
| GEC 001 SA * | 8 | 2 | 25 | 2.0 | 2.5–6 |
| GEC 001 | 12 | 4 | 40 | 2.3 | 5–8 |
| GEC 001L | 12 | 4 | 58 | 2.3 | 5–8 |
| GEC 001 A | 14 | 4 | 40 | 2.3 | 5–11 |
| GEC 001 AL | 14 | 4 | 58 | 2.3 | 5–11 |
| GEC 101 | 20 | 7.5 | 55 | 2.3 | 10–16 |
| GEC 101 L | 20 | 8 | 75 | 2.5 | 10–16 |
| GEC 101 A | 25 | 8 | 55 | 2.3 | 10–20 |
| GEC 101 AL | 25 | 8 | 75 | 2.5 | 10–20 |
| GEC 102 | 30 | 11 | 75 | 2.5 | 13–26 |
| GEC 102 L * | 30 | 11 | 110 | 2.5 | 13–26 |
| GEC 102 A | 35 | 11 | 75 | 2.5 | 13–30 |
| GEC 102 AL * | 35 | 11 | 115 | 2.5 | 13–30 |
| GEC 201 | 40 | 15 | 90 | 3.3 | 17–35 |
| GEC 201 L | 40 | 15 | 120 | 3.3 | 17–35 |
| GEC 201 A | 45 | 15 | 90 | 3.3 | 17–40 |
| GEC 201 AL | 45 | 15 | 120 | 3.3 | 17–40 |
| GEC 301 | 55 | 25 | 125 | 3.5 | 30–47 |
| GEC 301 L | 55 | 25 | 170 | 3.5 | 30–47 |
| GEC 301 A | 63 | 25 | 125 | 3.5 | 30–55 |
| GEC 301 AL | 63 | 25 | 170 | 3.5 | 30–55 |
| GEC 401 | 75 | 35 | 140 | 4.0 | 42–68 |
| GEC 401 L | 75 | 35 | 180 | 4.0 | 42–68 |
| GEC 401 A | 85 | 36 | 140 | 4.0 | 42–78 |
| GEC 401 AL | 85 | 35 | 180 | 4.0 | 42–78 |
| GEC 501 | 100 | 45 | 160 | 4.0 | 55–90 |
| GEC 501 L | 100 | 45 | 200 | 4.0 | 55–90 |
| GEC 501 A | 120 | 45 | 160 | 4.0 | 55–110 |
| GEC 501 AL | 120 | 45 | 200 | 4.0 | 55–110 |
| GEC 601 | 130 | 60 | 160 | 4.6 | 75–120 |
| GEC 601 L | 130 | 65 | 300 | 4.6 | 75–120 |
| GEC 701 | 158 | 60 | 165 | 4.6 | 75–145 |
| GEC 701 N | 158 | 65 | 165 | 5.5 | 75–145 |
| GEC 701 L | 160 | 65 | 300 | 4.5 | 75–145 |
| GEC 701 AL | 170 | 65 | 300 | 4.5 | 75–145 |
| GEC 701 XXL | 180 | 75 | 585 | 3.8 | 85–160 |
| GEC 801 S | 190 | 125 | 220 | 4.0 | 140–165 |
| GEC 801 | 230 | 125 | 220 | 4.0 | 140–200 |
| GEC 801 A | 280 | 125 | 225 | 3.8 | 140–250 |
| GEC 801 AL | 280 | 125 | 550 | 3.8 | 140–250 |
| GEC 901 | 310 | 120 | 220 | 7.0 | 140–280 |
| GEC 1001 | 400 | 204 | 220 | 6.0 | 230–360 |
| GEC 1101 | 500 | 204 | 220 | 6.0 | 230–460 |
* New sizes. Source: GALA INSULCAP catalogue sheet, Issue 2, March 2024.
Material properties
Technical Specification
| Properties | Value | Standard |
|---|---|---|
| Physical | ||
| Tensile Strength | 12 N/mm² (Mpa) (min.) | ASTM D638 |
| Ultimate Elongation | 350% (min.) | ASTM D638 |
| Density | 1.05 ± 0.2 gm/cm³ | ASTM D792 |
| Hardness | 45 ± 10 Shore D | ASTM D2240 |
| Water Absorption | 0.2% (max.) | ASTM D570 |
| Thermal | ||
| Accelerated Ageing | (120 °C for 500 hrs.) | ASTM D2671 |
| Tensile Strength | 11 N/mm2 (Mpa) (min.) | ASTM D638 |
| Ultimate Elongation | 300% (min.) | ASTM D638 |
| Low Temperature Flexibility (-40 °C for 4 hrs.) | No Cracking | ASTM D2671 |
| Heat Shock (250 °C for 30 min.) | No cracking or flowing | ESI 09-11 |
| Shrink Temperature | 125 °C | IEC 216 |
| Continuous Temperature Limit | -40 °C to +100 °C | IEC 216 |
| Electrical | ||
| Dielectric Strength | 12kV/mm. (min.) | ASTM D149 |
| Volume Resistivity | 1 x 10¹⁴ Ohm.cm (min.) | ASTM D257 |
| Dielectric Constant | 5 (max.) | ASTM D150 |
Source: GALA INSULCAP catalogue sheet, Issue 2, March 2024.
Dimensions & Drawings
Compatible with the most commonly used cable jackets: XLPE, PVC, PILC or rubber sheathed cable. The hot melt adhesive lining forms a permanent seal on irregular cable sheaths, to IP68 (Ingress Protection).
Covered on this page
- Heat Shrink Moulded Sealing Caps
- Cable End Caps - Cable End Sealing Cap - INSULCAP
Features & Benefits
- Meets IP68 Ingress Protection
- Dielectric strength 12 kV/mm min. (ASTM D149)
- Hot melt adhesive lining seals irregular cable sheaths permanently
- Custom logo/print tamper-proof marking after shrinking
- Conductive mastic option available
- GEC 001S to GEC 1101 size range
Applications
- Sealing cable ends on XLPE, PVC, PILC and rubber-sheathed cable
- Pressurised telecom cable sealing (valved variant)
- Degassing high-voltage power cable ends (relief-valve variant)
- Sealing live cable ends (Live End Cap Kit)
- Tamper-evident marking against cable-length pilferage claims
Standards & Compliance
- ASTM D638
- ASTM D792
- ASTM D2240
- ASTM D570
- ASTM D2671
- ESI 09-11
- IEC 216
- ASTM D149
- ASTM D257
- ASTM D150
FAQs
Frequently Asked Questions
What is the Insulcap Heat Shrink Cable End Sealing Caps used for?
It is used for:
- Sealing cable ends on XLPE, PVC, PILC and rubber-sheathed cable
- Pressurised telecom cable sealing (valved variant)
- Degassing high-voltage power cable ends (relief-valve variant)
- Sealing live cable ends (Live End Cap Kit)
- Tamper-evident marking against cable-length pilferage claims
How do I choose the right size?
Measure the outside diameter of the cable and choose the code whose "Cable range" covers it. For example, GEC 401 fits a cable of 42–68 mm. Where two ranges overlap, either code fits.
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:
- ASTM D638
- ASTM D792
- ASTM D2240
- ASTM D570
- ASTM D2671
- ESI 09-11
- IEC 216
- ASTM D149
- ASTM D257
- ASTM D150
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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