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PRODUCTS

Specializing in the production of highquality silicone rubber products

PRODUCT

Specializing in the production of highquality silicone rubber products

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Detail

Cold Shrink Silicone Insulating Tube

Yutian manufactures cold shrink silicone insulating tubes for cable protection and insulation. Pre-stretched over a removable core – installs in seconds without tools or heat. Provides IP68 waterproof sealing, excellent dielectric strength, and -50°C to +200°C temperature resistance. Ideal for cable joints, terminations, and telecom applications. Custom sizes. Wholesale only. Free samples.

Product Features

Excellent electrical insulation properties
High temperature resistance (-60°C to 200°C)
Flexible and durable with strong elasticity
Resistant to chemicals, oils, and solvents
Non-toxic and meets FDA, LFGB standards
Available in various sizes and thicknesses for custom applications

Application

Baby Daily Necessities	State Grid	BS/COM/ESS	Optoelectronics industry
mechanical seal	New energy vehicles	Home appliance	Sports equipment

Parameters

Product Features

Excellent electrical insulation properties
High temperature resistance (-60°C to 200°C)
Flexible and durable with strong elasticity
Resistant to chemicals, oils, and solvents
Non-toxic and meets FDA, LFGB standards
Available in various sizes and thicknesses for custom applications

Application

Baby Daily Necessities	State Grid	BS/COM/ESS	Optoelectronics industry
mechanical seal	New energy vehicles	Home appliance	Sports equipment

Product Detail

Cold Shrink Insulation Tubing | Power Cable Termination & Joint | Yutian

Yutian · Three factories one chain – from silicone raw material to cold shrink tubing

Cold Shrink Insulation Tubing

For power cable termination & intermediate joints · 1kV to 35kV · No heat required

✓ Cable termination✓ Intermediate joints✓ Switchgear & transformer

Cold shrink technology1kV – 35kV-40°C to +200°CIP67 waterproofUV resistant

Pull core – instant shrinkNo heat, no torchExcellent electrical insulationFree samples

Three factories · Full industry chain synergy

🧪

Guilin Yutian

Silicone raw material

⚙️

Dongguan Huahong

Compounding & auxiliaries

🏗️

Dongguan Yutian

Cold shrink tubing extrusion & assembly

Raw materialCompoundingExtrusionCold shrink assembly

Why Yutian cold shrink insulation tubing

⚡

Cold shrink technology – safe & fast installation

Pull out the core – tube shrinks instantly. No heat, no torch.

Pre‑expanded on a removable core. After positioning, simply pull the core strip – the tubing automatically shrinks and tightly wraps the cable. Eliminates fire risk and special tooling.

→ Installation time reduced by 60%, energize immediately

🛡️

Superior electrical insulation – 1kV to 35kV rated

Volume resistivity ≥1×10¹⁴ Ω·cm · withstand voltage ≥48kV/5min

High dielectric strength prevents leakage, flashover, and short circuits. Passes power frequency withstand voltage and partial discharge tests per GB/T 12706 and DL/T 1072.

→ Reliable protection for power distribution networks

🌊

IP67 waterproof & environmental sealing

Moisture, dust, salt fog, UV – all blocked

Constant elastic force maintains tight sealing against cable thermal expansion/contraction. Prevents water ingress, corrosion, and aging even in underground or coastal installations.

→ Extends cable life, reduces failure rate

🌡️

Wide temperature range & UV resistance

-40°C to +200°C continuous · 1000h UV aging no cracks

High performance silicone rubber resists ozone, UV, and extreme temperatures. Suitable for overhead lines, desert, arctic, and high‑humidity regions.

→ 20+ years outdoor service life

🧪

Chemical & corrosion resistant

Resists acids, alkalis, oils, and industrial pollutants

Ideal for chemical plants, metallurgy, wastewater treatment – where conventional heat shrink degrades quickly.

→ Low maintenance in harsh environments

📏

Custom sizes – fit any cable type

Pre‑shrink ID up to 150mm · wall 2‑6mm · any cable cross‑section

Standard supports 10mm²‑800mm², 1kV‑35kV. Custom inner diameter, wall thickness, color, and logo printing available.

→ Perfect for non‑standard or large cables

Technical specifications & custom range

Parameter	Standard range	Custom range
Rated voltage	1kV / 10kV / 20kV / 35kV	Up to 66kV
Cable cross‑section (mm²)	25 – 800 mm²	Custom per drawing
Inner diameter before shrink	20mm – 120mm	Up to 150mm
Wall thickness after shrink	2.0 – 4.5mm	1.5 – 6.0mm
Power frequency withstand (1min)	≥48kV (for 35kV grade)	Higher on request
Volume resistivity	≥1.0×10¹⁴ Ω·cm	—
Tensile strength	≥7.0 MPa	≥8.5 MPa
Elongation at break	≥400%	—
Hardness (Shore A)	40±5 A	30A – 75A
Temperature range	-40°C to +200°C	Short‑term 250°C
Protection rating	IP67 (immersion test)	IP68 optional

Key features at a glance

⚡

Cold shrink

No heat, pull core

🛡️

High insulation

1kV‑35kV rated

🌊

IP67 sealed

Water/dust proof

🌡️

Wide temp

-40°C to +200°C

☀️

UV resistant

1000h aging tested

📏

Custom sizes

ID up to 150mm

Typical applications

🔌

High voltage cable termination

10kV/35kV outdoor/indoor

🔗

Intermediate joints

Main insulation restoration

📦

Switchgear & ring main units

Elbow connector sealing

☀️

Solar & wind farm collector lines

Outdoor UV resistant

🚇

Tunnel & subway lighting

Waterproof & anti‑corrosion

🏭

Chemical & metallurgy plants

Chemical resistant

Made to your specification

Pre‑shrink ID up to 150mm · wall 1.5‑6.0mm

Voltage rating: 1kV to 66kV

Color: black standard, custom colors for phase identification

Logo printing: company name, voltage, installation marks

Complete kit: tubing + conductive tape + sealant + installation guide

Low tooling fee for custom expansion mandrels

🎁 Cooperation benefits

📦

Free samples

Standard sizes free (shipping cost applies)
Test installation & fit

🎨

Custom development

Sample in 7‑10 days for custom specs
Low MOQ for trials

⚡

Fast delivery

Stock 3‑5 days · custom 10‑15 days
Expedite available

Certifications & quality

📜

ISO 9001

Quality management

Certified

🔬

Type test report

National inspection center

GB/T 12706, DL/T 1072

🌱

RoHS / REACH

Halogen‑free

Compliant

⭐ National High‑tech Enterprise | 🏭 Class 8 cleanroom manufacturing

Customer feedback

“Yutian cold shrink tubing was used in three 35kV substation retrofits. Installation was very convenient – no heating required, outage time cut by half. All withstand voltage tests passed on the first try. Reliable product.”

— Chief Engineer, Zhejiang Power Engineering Company

Frequently asked questions

Can this cold shrink tubing be used outdoors and in submerged environments?

Yes. It meets IP67 (temporary immersion). Custom IP68 is available for continuous underwater use. It also passes UV aging and salt spray tests – ideal for coastal and outdoor installations.

What voltage ratings are available? Do you provide test reports?

We supply 1kV, 10kV, 20kV, and 35kV grades. Full type test reports (power frequency withstand, partial discharge, impulse) are available for grid tender requirements.

Is special training required for installation?

No. Each kit includes an illustrated installation guide and video tutorial. Basic cable preparation (cleaning, sizing) is all that is needed – then pull the core and the tubing shrinks automatically.

Can you make cold shrink tubing for non‑standard or large cables?

Absolutely. We can custom‑make pre‑expanded inner diameters up to 150mm and wall thickness up to 6mm. Also possible for branch or Y‑shaped cable joints – send your drawing for evaluation.

What is the typical lead time for custom cold shrink tubing?

For standard sizes (in stock): 3‑5 days. For custom mandrel and expansion tooling: 7‑10 days for samples, 10‑15 days for mass production.

Does it resist chemicals like oil, acid, or alkali?

Yes. Silicone rubber has excellent resistance to many chemicals, making it suitable for industrial environments such as chemical plants, refineries, and wastewater treatment.

Can I get a free sample before bulk order?

Yes. We offer free samples of standard sizes (shipping cost may apply). Contact us to request a sample for your cable size and voltage rating.

Need cold shrink insulation tubing for power cables – 1kV to 35kV?

Contact Yutian for free samples, type test reports, and custom sizing.

Request a quote →

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