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Specializing in the production of highquality silicone rubber products
PRODUCT
Specializing in the production of highquality silicone rubber products
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Cold shrink electric silicone tube
Introducing our cold shrink electric silicone tube, the ultimate solution for robust insulation. Perfect for automotive wiring, electronic devices, and industrial applications, it offers unparalleled protection against harsh environments. Its flexible design ensures easy installation, while its high-performance silicone material guarantees long-lasting durability. Keep your systems running smoothly with our top-quality insulation tubing.
Product Features
• Cold shrinkable silicone tube is an environmentally friendly sealing component, non-toxic and odorless;
• Soft, good elasticity, kink resistance without deformation;
• Strong ozone resistance and insulation performance, the product is not easy to crack in a sealed environment and has a long service life;
• Aging resistance, with higher tear strength and superior electrical performance;
• High and low temperature resistance, can maintain its original high sealing performance between -40° and 200°;
• High rebound, high expansion rate, low constant elongation deformation rate
Application
| Baby Daily Necessities | State Grid | BS/COM/ESS | Optoelectronics industry |
| mechanical seal | New energy vehicles | Home appliance | Sports equipment |
- Parameters
Product Features
• Cold shrinkable silicone tube is an environmentally friendly sealing component, non-toxic and odorless;
• Soft, good elasticity, kink resistance without deformation;
• Strong ozone resistance and insulation performance, the product is not easy to crack in a sealed environment and has a long service life;
• Aging resistance, with higher tear strength and superior electrical performance;
• High and low temperature resistance, can maintain its original high sealing performance between -40° and 200°;
• High rebound, high expansion rate, low constant elongation deformation rate
Application
| Baby Daily Necessities | State Grid | BS/COM/ESS | Optoelectronics industry |
| mechanical seal | New energy vehicles | Home appliance | Sports equipment |
Yutian · Factory-direct cold shrink tube manufacturer · 20+ years expertise · Three factories one chain
Cold Shrink Silicone Tube
4:1 shrink ratio · IP68 waterproof · -60°C to +200°C · Tool-free installation
✓ Telecom base stations · feeder cables✓ Power cables · 1kV to 35kV✓ Industrial sealing · custom profiles
Pull core – instant seal · no heat60% faster than heat shrinkBuilt-in mastic optionFree samples with COA
✅ Free samples with COA test report✅ Mass production matches sample – guaranteed✅ 1% daily penalty for delayed delivery✅ Engineer 1-on-1 selection guidance
Three factories · Full industry chain synergy
From silicone compounding to tube expansion and packaging – three integrated factories ensure complete quality control. We control the entire process from raw material to finished cold shrink tube.
🧪
Guilin Yutian
Silicone raw material · source control
⚙️
Dongguan Huahong
Compounding & auxiliaries · cost optimization
🏗️
Dongguan Yutian
Cold shrink tube expansion · packaging
Raw materialCompoundingExpansionPackaging
5,800m² facility14+ extrusion lines90+ production team10+ tons daily capacityISO 9001 certified
Why telecom & power buyers choose Yutian
4:1 shrink ratio
One tube · multiple cable sizes – reduces inventory SKUs
IP68 waterproof
Fully submersible – permanent sealing pressure
Tool-free installation
Pull core · instant seal – 60% faster than heat shrink
-60°C to +200°C
Extreme temperature – arctic to desert ready
Dielectric >25kV/mm
1-35kV rated – power cable insulation
Factory direct
Full chain control – no middlemen · consistent quality
Cold shrink vs. heat shrink – why cold shrink wins
| Feature | Cold Shrink (Yutian) | Heat Shrink |
|---|---|---|
| Installation | ✅ Tool‑free – pull core to shrink | ❌ Requires heat gun or torch – fire risk |
| Installation time | ✅ 15‑20 minutes | ❌ 40‑50 minutes + cooling |
| Fire risk | ✅ None – no heat source | ❌ High – hot work permits required |
| Interface pressure | ✅ Constant 'living seal' pressure | ❌ No interface pressure – relies on adhesive |
| Cable movement | ✅ Accommodates thermal expansion/contraction | ❌ Rigid – can crack under cable movement |
| Installation position | ✅ Any position on the cable | ❌ Must slide from end before full installation |
Key advantages – engineered for telecom & power
📐
4‑5:1 shrink ratio – one tube, multiple cable sizes
Reduces inventory SKUs · simplifies logistics
Our cold shrink silicone tube offers a 4:1 to 5:1 shrink ratio. A single tube size accommodates a wide range of cable diameters – from 8mm to 63mm depending on model. This means fewer parts to stock, simplified logistics, and lower inventory costs for telecom contractors, power utilities, and OEM manufacturers.
→ One tube · many sizes · lower inventory
🔧
Tool-free installation – 60% faster than heat shrink
Pull core · instant seal · no heat · no tools
Installation is simple and fast – position the cold shrink silicone tube, pull the core, and the sleeve instantly contracts. No heat guns, no gas torches, no special tools, no fire risk. This makes it ideal for confined spaces, tower climbs, hazardous areas, and sites where hot work permits are difficult to obtain.
→ Faster installation · lower labor cost
💧
IP68 waterproof – outdoor & submersible ready
Constant sealing pressure · permanent protection
Our cold shrink silicone tube provides IP68 waterproof protection – fully protected against dust and continuous immersion in water. The silicone material's permanent elastic force maintains constant sealing pressure, preventing water, moisture, and humidity from penetrating the cable connection. Suitable for direct burial, aerial, and submersible applications.
→ Waterproof · dustproof · worry-free
🌡️
Extreme temperature range – -60°C to +200°C
Arctic to desert · any climate
Our silicone cold shrink tubing operates reliably from -60°C to +200°C. Remains flexible at low temperatures – no hardening, no cracking. Maintains shape at high temperatures without softening or degrading. Suitable for arctic outdoor equipment, desert telecom towers, and high-temperature industrial environments.
→ Any climate · any environment
☀️
UV, ozone & weather resistant – 20+ year service life
Outperforms EPDM · proven in outdoor installations
Formulated with advanced UV stabilizers, our cold shrink silicone tube resists cracking, degradation, and aging from prolonged sun exposure. Resists ozone – a common cause of rubber degradation in electrical and outdoor equipment. With a 20+ year outdoor service life, it significantly outperforms EPDM and other rubber alternatives.
→ 20+ years · reliable · low maintenance
⚡
High dielectric strength – >25kV/mm for power applications
1-35kV rated · excellent tracking resistance
Our power cable cold shrink tube delivers dielectric strength >25kV/mm with excellent tracking and contamination resistance. Suitable for cable terminations, intermediate joints, and direct burial applications up to 35kV. High dielectric‑constant material regulates electric field stress distribution.
→ Reliable insulation · power-grade
🔗
Built‑in mastic option – enhanced waterproofing
Secondary seal layer · maximum moisture protection
For applications requiring maximum moisture protection, we offer a built‑in mastic option. The mastic provides a secondary seal layer that flows around the cable surface during installation, creating an additional barrier against moisture ingress. Ideal for underground, coastal, and high-humidity installations.
→ Double seal · double protection
📏
Customizable – ID, length, ratio, color
Any spec · any application · your design
We offer full customization: pre‑shrink inner diameter 20‑80mm, length 50‑500mm, shrink ratio 3‑5x, color black/gray/custom, hardness 40‑60 Shore A, built‑in mastic optional, flame retardancy on request. OEM/ODM orders welcome – your design, our production.
→ Your spec · our solution
Technical specifications
| Parameter | Standard | Custom |
|---|---|---|
| Material | High‑performance silicone rubber | |
| Shrink ratio | 4:1 (up to 5:1) | 3‑5x adjustable |
| Pre‑shrink ID | 28 – 70 mm | 20 – 80 mm |
| Post‑shrink length | 125 – 178 mm | 50 – 500 mm |
| Dielectric strength | >25kV/mm | Higher on request |
| Temperature range | -60°C to +200°C | Extended |
| Waterproof rating | IP68 | |
| Tensile strength | ≥9.8 MPa | — |
| Elongation at break | ≥840% | — |
| Tear strength | ≥39 kN/m | — |
| Hardness (Shore A) | 40‑60 A | 30‑70 A |
| Color | Black | Gray / Custom |
| Built‑in mastic | Optional | Available |
| Certifications | ISO 9001, RoHS, REACH · FDA/LFGB (optional) | |
Standard models – ready to ship
| Model | Pre‑shrink ID (mm) | Cable Range (mm) | Length (mm) | Application |
|---|---|---|---|---|
| SFP28/6-125 | 28 | 8‑25 | 125 | Base station feeder · coaxial |
| SFP35/10.5-178 | 36 | 10.5‑30 | 178 | Telecom base station · antenna feeder |
| SFP40/11.9-140 | 40 | 11.9‑34 | 140 | Medium‑large connector sealing |
| SFP45/13.5-152 | 45 | 13.5‑39 | 152 | Power cable · industrial equipment |
| SFP53/18.2-152 | 53 | 18.2‑45 | 152 | Large diameter cable sealing |
| SFP70/22.4-125 | 70 | 22.4‑63 | 125 | Large connectors · outdoor equipment |
💡 All standard models available from stock. Custom sizes available with low MOQ and fast turnaround.
Silicone cold shrink vs. EPDM – which one to choose?
| Property | Silicone (Yutian) | EPDM |
|---|---|---|
| UV resistance | ✅ Excellent – highest among all tubings | ⚠️ Good |
| Temperature range | ✅ -60°C to +200°C | ⚠️ -40°C to +120°C |
| Ozone resistance | ✅ Excellent | ✅ Good |
| Flexibility at low temp | ✅ Excellent – stays flexible | ⚠️ Good |
| Service life | ✅ 20+ years | ⚠️ 15‑20 years |
| Dielectric strength | ✅ >25kV/mm | ⚠️ Good |
| Best for | Telecom, outdoor, high‑UV | Direct burial, cost‑sensitive |
💡 Silicone cold shrink offers the highest UV resistance among all cold‑ or heat‑applied tubings and the widest temperature range – making it the superior choice for telecom, outdoor, and extreme environment applications.
Applications – telecom, power & industrial
📡
Telecom base stations
Feeder cables · antenna‑to‑feeder · N‑type/DIN connectors
🔌
Coaxial cable
CATV · RF cable assemblies · N‑type / 4.3‑10 / NEX10
⚡
Power cable
1kV‑35kV terminations · intermediate joints · direct burial
🏭
Industrial & OEM
Irregular connectors · reducer joints · antenna transition
🔧
Pipe repair
Damaged pipeline sealing · outdoor equipment protection
🌊
Submersible & coastal
IP68 protection · salt spray resistant · underwater applications
Base station feeder sealingCoaxial cable waterproofPower cable insulationOutdoor equipment sealingCustom cold shrink tubes
Made to your specification – custom cold shrink tubes
Pre‑shrink ID – 20‑80mm custom
Length – 50‑500mm custom
Shrink ratio – 3‑5x adjustable
Color – black / gray / custom
Hardness – 30‑70 Shore A
Built‑in mastic – optional
Flame retardancy – custom formulation
Voltage rating – 1‑35kV adjustable
Fast sampling – 3‑5 days standard / 7‑10 custom
OEM/ODM – your design, our production
Case studies – real B2B projects
Telecom infrastructure provider – supplies to 3 major telecom operators · 1,000,000+ sets annually · base station feeder sealing · 5+ years · zero field failures
Coaxial cable manufacturer – RoHS-compliant cold shrink tubes · export to EU & US · 100,000+ units · full compliance documentation
Power engineering company – 10kV cable termination seals · >25kV/mm dielectric · passed withstand voltage · long-term stable operation
Communications equipment exporter – IP68-rated antenna feeder seals · built-in mastic option · met all export requirements
Certifications & quality – ISO 9001 · RoHS · IP68
ISO 9001
Quality management
CertifiedRoHS / REACH
Environmental compliance
CertifiedIP68
Waterproof rating
Certified⭐ National High‑tech Enterprise | 🏭 ISO Class 8 cleanroom | 🏭 20+ years
🎁 Cooperation benefits – for B2B buyers
📦
Free samples
Standard sizes free · Sample with COA · Test before you commit
🎨
Custom development
Sample in 3-5 days · low MOQ · custom ID/length/ratio
⚡
Fast delivery
Stock 5-7 days · custom 5-7 days · expedite available
Frequently asked questions – for B2B buyers
What is the difference between cold shrink and heat shrink tubing?
Cold shrink requires no heat – simply pull the core and the tube contracts. Installation is 60% faster, eliminates fire risk and hot work permits, and provides constant interface pressure – a “living seal” that moves with the cable. Heat shrink requires heat guns or torches, hot work permits, and provides no interface pressure.
What does 4:1 shrink ratio mean?
A 4:1 shrink ratio means the tube can expand to 4 times its final size before installation. This allows a single tube size to accommodate a wide range of cable diameters – reducing inventory SKUs for contractors and utilities.
What temperature range can these tubes handle?
-60°C to +200°C continuous. Remains flexible at low temperatures – no hardening, no cracking. Suitable for arctic, desert, and high-temperature industrial environments.
Are they suitable for outdoor use?
Yes. Our cold shrink silicone tubes are UV resistant, ozone resistant, and weather resistant. With a 20+ year outdoor service life, they are ideal for base stations, antenna feeders, outdoor cabinets, and coastal installations.
What is the waterproof rating?
IP68 – fully protected against dust and continuous immersion in water.
Do you offer built‑in mastic / sealing adhesive?
Yes. Built‑in mastic option available for enhanced waterproofing. The mastic provides a secondary seal layer for maximum moisture protection.
Can you customize dimensions for non‑standard applications?
Absolutely. We offer custom pre‑shrink inner diameter (20‑80mm), custom length (50‑500mm), custom shrink ratio (3‑5x), custom color, and custom profiles for irregular connectors. Send your drawing – we'll produce the exact tube you need.
What is the lead time for custom orders?
Samples: 3‑5 days for standard models, 7‑10 days for custom. Production: 5‑7 days after approval. Expedited service available.
Can I get a free sample?
Yes – standard sizes free for qualified B2B buyers. Contact us to request a sample for testing.
What certifications do you have?
ISO 9001 certified. RoHS compliant. REACH compliant. FDA/LFGB available on request. Dielectric strength >25kV/mm verified.
Need cold shrink silicone tubes for your telecom, power, or industrial application?
4:1 shrink · IP68 · -60°C to +200°C · Factory-direct · Free samples · Custom sizes
🎁 First 10 inquiries → free sample + priority tooling📦 Free sample with COA test report
Request a quote →Dongguan Yutian Silicone Rubber Technology Co., Ltd. | Cold shrink silicone tube manufacturer | 4:1 shrink ratio · IP68 waterproof · -60°C to +200°C | Telecom · Power · Industrial | Custom sizes · OEM/ODM · Factory-direct
Tel/Whatsapp: +86 18028921514 | Email: salesmanager@yutiansilicone.com
Tel/Whatsapp: +86 18028921514 | Email: salesmanager@yutiansilicone.com
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