Silicone Rubber Cold Shrink Tubing for Solar Plants Generation for Connector MC4

Product Description

Silicone rubber cold shrink tube - special for photovoltaic connectors

Silicone rubber cold shrink tube, specifically designed for photovoltaic connectors, is an insulating sleeve made from special silicone rubber, pre-expanded over a removable support tube. Its very high expansion ratio allows it to accommodate the radial size differences between photovoltaic connectors and optical cables. When in use, simply position it and remove the support tube. It utilizes its radial shrinking force to form a tight encapsulation, providing insulation, dust prevention, waterproofing, and sealing effects

Support customization, ODM & OEM available

Applications for Offshore Photovoltaic MC4 Connectors-UV Resistant, Salt Spray Corrosion Resistant, Waterproof, Sealing

Features:

1. Continuous operating temperature: -55°C～180°C
2. Shrink Ratio : 6:1 or so. Suits for an extensive range of cable sizes because of the shrinkage
3. Retains its resiliency and pressure even after prolonged years of ageing and exposure, seals tight against moisture and water
4. Good weather resistance, ozone ageing, ultraviolet and salt mist corrosion resistance, performs stably under long-period exposure to the sun
5.  Simple installation, requires no special heating tools, and adhesive to seal the connections
6. Standard color: black. Other colors can be customized

Click chat now to contact us for free samples！

VR

Technical Performance

Properties	Typical Data	Test Method
Hardness	40±5	GB/T 531-2008
Tensile strength	≥7.0MPa	GB/T 528-2009
Tensile strength after aging MPa - 232℃×7 D	≥ 60% of initial value	/
Elongation at break	＞800%	GB/T 528-2009
Elongation at break after aging % - 232℃×7 D	≥25% of initial value	/
Tear strength	≥25kN/m	GB/T 529-2008
Volume resistivity	≥10 12Ω/m	/
Flammability	HB	UL 94
Requirements for UV/ light aging resistance test	Tensile strength ≥75% of initial value, no surface damage	/

Structure

Dimensions

Size	Inner Diameter - mm	Min Cable Outer Diameter - mm	Max Cable Outer Diameter - mm	Full Recovered Length - mm
VS-25*220	Ф25	6.0	20.0	220
	Ф25	6.0	20.0	175
Note: Special sizes & packing are available on request

Company Show

Suzhou Volsun Electronics Technology Co., Ltd. was founded in 2006. We keep focusing on the R&D, production and sales in insulation, sealing & protection solutions for over 20 years

Quality is our culture. Volsun has a modern quality management system, which has passed a series of quality system certification such as IATF16949, ISO9001 etc

Up to now, Volsun cooperated with customers from 88 countries, we offer suitable sealing, waterproof solutions for some well-know enterprises in communication, Automobile, Power industry etc

Quality Assurance

Our management and employees are committed to providing the highest quality products and services. This ongoing commitment is recognized through ISO9001, ISO14001, ISO45001, IATF16949, UL, ROHS, and REACH certifications. We employ rigorous quality assurance standards to guarantee our customers the highest quality standards

We also have the ability to be your just-in-time supplier. This helps you keep your production lines running and provides better cash flow management by eliminating inventory requirements

Because every manufacturer has different needs and challenges to overcome, we are committed to providing exceptional service to each of our customers. We will work with you to provide the best solution to meet your needs

Abroad Exhibition

Packing & Delivery

Trade terms	FOB, EXW, CIF, DDU, DDP, CFR
Payment terms	T/T, L/C, Negotiable
Supply capability	1,000,000 pieces per month
Lead time	Usually 2-3 working days
Shipment	Express, Air, Sea
Port	Shanghai, Ningbo, Shenzhen
Sample availability	Yes
Sample time	Usually 1-2 days
Packaging	Normal: Plastic bag & Carton & Pallet Special: Customized packing

FAQ

Q 1. How long is the payment term
A: We accept T/T 50% deposit and 50% balance against B/L or L/C copy at sight, also accept Western Union, VISA and Paypal

Q 2. What is the normal lead time for product orders
A: The average lead time for prototype/first piece is 7~10 days, if tooling is involved, the lead time for production tooling  is 10 days, and the average production time after sample approval is 2-3 weeks

Q 3. What is your standard packaging
A: All goods will be packed in cartons and loaded on pallets. Special packing methods are acceptable when needed

Q 4. Can you tell us the monthly production capacity of your products
A: It depends on the model, we produce more than 1500 tons of rubber materials per month

Q 5. What kind of certificates do you have
A1: We have ISO9001:2015, IATF16949:2016, ISO14001:2015, ISO45001:2018 certified
A2: We have various rubber compounds approved by UL, ROHS and REACH

Q6: How to check the quality of bulk order
A1: We provide pre-production samples to all customers before mass production if needed
A3: We accept third-party inspection, such as SGS, TUV, INTERTEK, BV, etc

Q 7: Can you provide customized service
A: Yes, we accept customization and can produce products in different sizes, packaging, colors according to requirements

Volsun Silicone Rubber Cold Shrink Tubing for Solar Plants Generation for Connector MC4

Volsun introduces Silicone Rubber Cold Shrink Tubing designed specifically for solar connector protection and MC4 connector sealing in renewable energy cabling. This silicone cold shrink tubing product delivers a reliable, long-lasting field-installable solution that enhances solar connector protection and improves MC4 connector sealing performance across diverse environmental conditions. The silicone cold shrink tubing by Volsun is engineered for ease of installation and superior protection, offering installers and system designers a dependable option for renewable energy cabling challenges. When specifying products for solar connector protection and MC4 connector sealing, Volsun silicone cold shrink tubing stands out for its material quality, application versatility, and contribution to system longevity.

Product Description and Features

Volsun silicone cold shrink tubing is made from high-grade silicone rubber compound formulated to resist UV, ozone, and extreme temperatures, providing robust solar connector protection and consistent MC4 connector sealing. The silicone cold shrink tubing is supplied in a pre-stretched tubular form that shrinks to its original size without the need for heat, tools, or adhesives, ensuring straightforward field deployment for renewable energy cabling projects. This cold shrink tubing is designed to compress uniformly around MC4 connectors and cable joints to achieve effective MC4 connector sealing and to prevent water ingress, dust accumulation, and corrosive exposure that can compromise system performance.

Key features include:

- Superior solar connector protection through resilient silicone rubber that resists environmental degradation and maintains elasticity over long service life.

- True MC4 connector sealing with a compression fit that forms a tight barrier around connector housings and cable insulation.

- Easy installation: silicone cold shrink tubing requires only removal of the internal support core, enabling rapid deployment without heat sources or specialized tools, reducing installation time and enhancing safety during renewable energy cabling work.

- Excellent dielectric strength and electrical insulation properties suitable for PV system requirements, providing additional solar connector protection and reducing risk of short circuits or tracking.

- Wide operating temperature range and UV resistance, giving consistent MC4 connector sealing integrity under prolonged sun exposure and temperature cycling in solar plants.

- Chemical and moisture resistance to protect connectors and cable interfaces from corrosive agents and humidity intrusion, promoting durable renewable energy cabling installations.

Applications in Solar Plants and Renewable Energy Systems

Volsun silicone cold shrink tubing is optimized for use in solar plants and other renewable energy cabling contexts. It is particularly effective for solar connector protection and MC4 connector sealing in the following applications:

- PV module connector joints: Providing MC4 connector sealing and solar connector protection at module-to-module connections and string junctions.

- Combiner boxes and string termination points: Safeguarding connector interfaces and cable terminations with silicone cold shrink tubing to ensure reliable renewable energy cabling.

- In-field repairs and retrofits: Quick and dependable MC4 connector sealing when performing maintenance or upgrading older PV arrays, leveraging the ease of cold shrink tubing deployment.

- Harsh climates: Solar farms in coastal, desert, or high-humidity environments benefit from Volsun silicone cold shrink tubing for improved solar connector protection and MC4 connector sealing against salt spray, sand, and moisture.

- Custom cabling assemblies: OEM and system integrators can incorporate silicone cold shrink tubing into pre-assembled renewable energy cabling harnesses to provide factory-applied solar connector protection and durable MC4 connector sealing.

Innovation and Technical Advantages

Volsun’s silicone cold shrink tubing presents several technical advantages tailored to the demands of solar connector protection and MC4 connector sealing in modern renewable energy cabling:

- Cold shrink technology eliminates the need for heat shrink equipment, reducing installation complexity and risk. Installers can implement MC4 connector sealing with minimal training, while maintaining high standards for solar connector protection.

- The silicone rubber formulation offers superior flexibility and memory retention, enabling the silicone cold shrink tubing to conform tightly around irregular connector shapes and cable profiles, ensuring a reliable MC4 connector sealing interface for the life of the installation.

- Enhanced environmental resistance extends the service life of both connectors and cabling systems. The silicone cold shrink tubing maintains its sealing performance under UV exposure and temperature extremes, delivering consistent solar connector protection and reducing maintenance cycles for renewable energy cabling.

- Compatibility with standard MC4-compatible connectors and common PV cable diameters simplifies specification and inventory management for installers focused on solar connector protection and MC4 connector sealing solutions.

- The product provides robust dielectric isolation and mechanical protection, strengthening the overall integrity of renewable energy cabling systems and decreasing the likelihood of failure due to moisture ingress or contaminants.

Performance Specifications and Compliance

Volsun silicone cold shrink tubing is produced to meet industry expectations for renewable energy cabling protection. Typical performance characteristics include:

- High dielectric strength and low electrical conductivity, enabling reliable solar connector protection and MC4 connector sealing without compromising electrical safety.

- Resistance to UV radiation and ozone to maintain MC4 connector sealing effectiveness over extended outdoor exposure.

- Broad operating temperature range suitable for common PV installations, ensuring consistent silicone cold shrink tubing performance in both hot and cold climates.

- Chemical and humidity resistance to preserve solar connector protection and prevent degradation of MC4 connector sealing in corrosive or humid environments.

- Durable mechanical resilience to resist abrasion and mechanical stresses encountered in the field, supporting long-term renewable energy cabling system reliability.

Installation Guidance

For effective MC4 connector sealing and solar connector protection, Volsun provides clear installation guidance for silicone cold shrink tubing:

- Select the correct silicone cold shrink tubing size to match connector and cable diameters, ensuring complete coverage for optimal solar connector protection.

- Position the pre-expanded tubing over the connector or joint and remove the internal core to allow the silicone cold shrink tubing to recover and compress uniformly around the MC4 connector sealing interface.

- Verify that the tubing fully encloses the connector body and cable insulation to achieve a continuous seal and to deliver enduring solar connector protection.

- For added mechanical security in highly dynamic installations, complementary strain relief or cable clamps can be used alongside the silicone cold shrink tubing without compromising MC4 connector sealing.

Why Choose Volsun

Choosing Volsun silicone cold shrink tubing for renewable energy cabling ensures that solar installers and system owners receive a practical, durable, and field-proven option for solar connector protection and MC4 connector sealing. Volsun’s focus on material science and field usability yields silicone cold shrink tubing that simplifies installations, enhances safety, and preserves PV system performance. For projects demanding reliable MC4 connector sealing and robust solar connector protection, Volsun delivers a high-quality silicone cold shrink tubing solution tailored to the needs of modern renewable energy cabling