IP68 Waterproof Silicone Cold Shrink Sealing Kit for Solar Energy Systems

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 introduces the IP68 Waterproof Silicone Cold Shrink Sealing Kit for Solar Energy Systems, a robust and reliable solution engineered to protect outdoor power connections in demanding renewable energy environments. Designed to deliver unmatched sealing performance and long-term stability, this solar sealing kit addresses the unique challenges of renewable energy connectors and outdoor cable protection for photovoltaic arrays, inverters, junction boxes, and field-deployed electrical junctions. With a focus on durability, ease of installation, and compatibility, the Volsun IP68 silicone cold shrink system redefines how technicians secure and insulate critical connections on-site.

Key Features and Product Overview

The Volsun IP68 Waterproof Silicone Cold Shrink Sealing Kit is a pre-formed silicone sleeve assembly that cold-shrinks to form a tight, resilient seal around a wide range of connector types and cable diameters used in solar energy systems. Engineered using high-performance silicone elastomers, the kit offers IP68-rated ingress protection against dust and prolonged immersion in water, ensuring that renewable energy connectors remain dry, corrosion-free, and electrically safe throughout their service life. The silicone construction provides excellent UV resistance and thermal stability across extreme temperature cycles commonly encountered in outdoor cable protection scenarios.

Applications

This solar sealing kit is purpose-built for photovoltaic installations, including rooftop, ground-mounted, and floating solar farms. It is equally suited for use with inverters, combiner boxes, micro-inverters, optimizers, battery energy storage interconnections, and any outdoor junctions where renewable energy connectors require dependable environmental sealing. Installers will find the kit valuable for maintenance and retrofitting projects, as well as new builds, because it simplifies the process of securing outdoor cable protection without the need for heating tools or complex adhesives. The cold shrink method makes it ideal for on-site work where speed, safety, and cleanliness are priorities.

Technical Advantages and Innovation

Volsun’s IP68 silicone cold shrink design provides several technical advantages that set this solar sealing kit apart from traditional sealing methods:

- Cold Shrink Simplicity: Unlike heat-shrink tubing that requires a heat gun, the cold shrink approach uses an internal removable core that allows the silicone sleeve to recover tightly around the cable and connector once the core is removed. This results in a consistent, tool-free installation that reduces labor times and eliminates risks associated with on-site heating.

- IP68 Certification: The kit meets stringent IP68 ingress protection standards, ensuring complete protection against dust ingress and long-term immersion in water. This level of performance makes the kit ideal for harsh environments where outdoor cable protection is essential to maintain system uptime and reduce maintenance costs.

- Silicone Elastomer Benefits: Silicone’s inherent resistance to UV, ozone, and extreme temperature fluctuations provides exceptional longevity. The silicone material remains flexible in cold climates and stable under high heat, preventing cracking, hardening, or loss of sealing force that can compromise connector integrity.

- Broad Compatibility with Renewable Energy Connectors: The design accommodates a wide spectrum of connector geometries and cable sizes commonly used in solar arrays and energy storage systems. Whether sealing MC4-style connectors, multi-core cables, or custom junctions, this solar sealing kit can be adapted to secure virtually any outdoor cable protection requirement.

- Mechanical and Chemical Resilience: Besides providing waterproof performance, the silicone sleeve offers abrasion resistance and chemical inertness, protecting connections from salt spray, airborne contaminants, and aggressive cleaning agents often present near coastal or industrial solar sites.

Installation Benefits

The IP68 silicone cold shrink sealing kit simplifies installation processes for field technicians and reduces the margin for installation error:

- Rapid Deployment: Technicians can install the solar sealing kit quickly without special tools or complex procedures. The cold shrink sleeve is positioned over the connection, the inner core is extracted, and the sleeve contracts to form a tight seal. This reduces on-site labor and accelerates commissioning of solar arrays.

- Clean, Safe Application: Because no heat or solvent is required, the kit avoids fire risks, smoke, and toxic fumes, creating a safer working environment and minimizing the need for protective equipment during installation.

- Rework and Serviceability: The reversible nature of some cold shrink configurations enables easier access for inspection or repair. Where necessary, installers can remove and replace sealing sleeves without permanently altering the underlying connectors.

Performance and Reliability

Volsun’s IP68 silicone cold shrink sealing kit has been subjected to rigorous testing to validate its long-term performance under real-world conditions. The product consistently demonstrates sustained waterproof sealing, mechanical integrity, and resistance to UV degradation over thousands of thermal cycles and wet/dry exposures. For system designers and asset owners, this translates to fewer sealing failures, reduced downtime, and lower lifecycle maintenance costs for outdoor cable protection in renewable energy installations.

Design Considerations for Solar Installers

When planning deployments, installers should consider the specific connector types and cable diameters present in each system. Volsun provides the IP68 silicone cold shrink sealing kit in multiple sizes and configurations to match common renewable energy connectors and varying cable jackets. The flexibility of the silicone material enables custom adaptations for unique field conditions. Additionally, the kit’s compact profile and low weight make it a practical choice for rooftop arrays where space and load considerations are important.

Sustainability and Economic Value

By improving the durability of renewable energy connectors and reducing the frequency of maintenance interventions, Volsun’s solar sealing kit contributes to sustainable operation of photovoltaic systems. Fewer replacement parts and less frequent site visits reduce the carbon footprint associated with system upkeep. Economically, the reduced labor time and lower failure rates yield measurable cost savings over the operational life of the installation, improving return on investment for project owners.

Use Cases

- New photovoltaic installations where standardized, reliable seals are required for immediate commissioning.

- Retrofit projects where aging seals or heat-shrink sleeves have failed and a cold shrink replacement is preferred.

- Coastal and high-humidity installations where salt spray and moisture intrusion pose a heightened risk to renewable energy connectors.

- Remote or utility-scale solar farms where minimizing downtime for field repairs significantly impacts energy yield and operational expenses

Why Choose Volsun

Volsun leverages years of experience in developing solutions tailored to the renewable energy sector. The IP68 Waterproof Silicone Cold Shrink Sealing Kit for Solar Energy Systems reflects a commitment to quality, compatibility, and installer-centric design. With proven IP68 performance, superior silicone material properties, and broad adaptability to renewable energy connectors, this solar sealing kit provides a dependable path to enhanced outdoor cable protection.

For installers, system integrators, and owners seeking a high-performance sealing solution, Volsun’s IP68 Waterproof Silicone Cold Shrink Sealing Kit for Solar Energy Systems offers a straightforward, durable, and cost-effective way to protect renewable energy connectors. Combining IP68 silicone cold shrink reliability with rapid, tool-free installation and resistance to environmental degradation, the kit secures outdoor cable protection and extends the operational lifetime of photovoltaic assets. Choose Volsun’s solar sealing kit to safeguard connections, reduce maintenance, and ensure uninterrupted energy production in any outdoor solar setting.