Silicone Rubber Cold Shrink Tubing IP68 Waterproof Insulation Sleeve for Solar Photovoltaic MC4 Connector

About Product

Highlight

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

 

About Us

Volsun, founded in 2006, is a high-tech enterprise specializing in the research, development, production, and sales of polymer materials. With two major production bases in Yangzhou and Suzhou covering over 25,000 square meters, we provide a comprehensive range of safety protection solutions, including insulation, sealing, waterproofing, thermal conductivity and electrical conductivity, widely applied across industries such as electricity, telecommunications, automotive, and electronics etc. Driven by innovation, Volsun has established strong industry-academia-research partnerships with leading Chinese universities and holds 97 technology patents, reinforcing our leadership in polymer materials technology. Our core products include cold shrink/heat shrink tubes, fiberglass sleeves, silicone self-fusing tape, silicone overhead line cover, thermal pads, shaft grounding rings, and various insulation products. Volsun is certified under IATF 16949 and ISO 9001 quality management systems, ensuring the highest product standards. As a technology-driven company, guided by our mission to innovate materials for a safer world, we have provided OEM and ODM services to over 6,000 customers in 88 countries. Committed to continuous innovation, we strive to deliver superior protection solutions that enhance the safety and performance of your projects

                   

FAQs

How long is the payment term

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

What is the normal lead time for product orders

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

What is your standard packaging

All goods will be packed in cartons and loaded on pallets. Special packing methods are acceptable when needed

What kind of certificates do you have

We have ISO9001:2015, IATF16949:2016, ISO14001:2015, ISO45001:2018 certified We have various rubber compounds approved by UL, ROHS and REACH

How to check the quality of bulk order

We provide pre-production samples to all customers before mass production if needed. We accept third-party inspection, such as SGS, TUV, INTERTEK, BV, etc

Can you provide customized service

Yes, we accept customization and can produce products in different sizes, packaging, colors according to requirements

Volsun presents its Silicone Rubber Cold Shrink Tubing IP68 Waterproof Insulation Sleeve for Solar Photovoltaic MC4 Connector, a high-performance sealing component engineered to deliver durable protection, reliable insulation, and exceptional environmental resilience for solar arrays and photovoltaic systems. Designed and manufactured by Volsun, a National High-tech Enterprise with extensive polymer materials R&D and production experience, this cold shrink tubing is a specialized solution that addresses the critical demands of modern renewable energy deployments. Built to provide solar photovoltaic insulation and MC4 connector waterproofing, it offers renewable energy sealing solutions and IP68 cable protection suitable for rooftop, ground-mounted, and utility-scale installations

Key Features and Design Advantages

- Robust Solar Photovoltaic Insulation: The silicone rubber formulation delivers outstanding dielectric strength and stable insulating properties across wide temperature ranges, making it ideal for long-term solar photovoltaic insulation. The material resists degradation from UV exposure, ozone, and environmental contaminants, ensuring continuous electrical insulation performance for photovoltaic modules and system interconnections

- Reliable MC4 Connector Waterproofing: Specifically sized and profiled for MC4 connector interfaces, this cold shrink sleeve provides precise MC4 connector waterproofing by forming a tight, uniform, stress-free seal around connector bodies and cable junctions. The engineered fit minimizes ingress risk and helps maintain system integrity under wet and harsh outdoor conditions

- IP68 Cable Protection and Sealing: Rated IP68, this silicone rubber cold shrink tubing ensures impermeable IP68 cable protection against dust and prolonged water immersion. The sleeve’s sealing geometry and material elasticity enable consistent contact with cable jackets and connector housings, producing a resilient barrier that meets stringent ingress protection requirements for renewable energy sealing solutions

- Cold Shrink Convenience: As a cold shrink solution, the tubing is supplied pre-stretched on a removable core, allowing rapid, tool-free installation that reduces labor time and eliminates heat-based application risks associated with heat-shrink alternatives. Cold shrink enables safe deployment around sensitive connectors and pre-assembled harnesses while preserving connector integrity and performance for solar photovoltaic insulation tasks

- Environmental and Mechanical Durability: The silicone compound is formulated for flexibility at low temperatures and stability at elevated temperatures, providing mechanical resilience under freeze-thaw cycles, thermal cycling, and mechanical vibration. This durability enhances long-term MC4 connector waterproofing performance and maintains IP68 cable protection in challenging climates and harsh outdoor environments

- OEM/ODM and Quality Assurance: Manufactured by Volsun, the product benefits from the company’s extensive experience in polymer R&D, 97 patents, and quality systems including IATF 16949 and ISO 9001. Custom sizing, color matching, and material tailoring are available through OEM/ODM channels, enabling integrators and EPC contractors to incorporate solar photovoltaic insulation components that align with project specifications and regulatory requirements

Applications and Use Cases

- Photovoltaic Module Interconnections: The cold shrink sleeve is ideal for insulating and protecting MC4 connector interfaces between photovoltaic modules and extension cables, offering consistent solar photovoltaic insulation to safeguard against short circuits and moisture-induced failures

- String Combiner Boxes and Junctions: Use the sleeve to ensure MC4 connector waterproofing and IP68 cable protection at combiner box entries, junctions, and field splice points, reinforcing system resilience and lowering maintenance demands

- Rooftop and Ground-Mounted Installations: The cold shrink tubing performs well across residential and commercial rooftop arrays, as well as large ground-mounted solar farms, supporting renewable energy sealing solutions that withstand environmental stressors such as rain, dust, and temperature fluctuations

- Portable and Off-grid Systems: Lightweight and easy to install, the sleeve enables reliable solar photovoltaic insulation and MC4 connector waterproofing in portable PV kits, off-grid systems, and remote installations where IP68 cable protection and minimal maintenance are essential

- Retrofit and Repair: Field technicians can quickly apply cold shrink sleeves during maintenance or retrofit operations to restore compromised seals, enhance solar photovoltaic insulation, and re-establish MC4 connector waterproofing without complex tooling or reworking existing cable assemblies

Technical Benefits and Performance Metrics

- Dielectric Strength and Insulation Stability: The silicone rubber composition yields high dielectric breakdown voltage and stable resistivity, delivering dependable solar photovoltaic insulation throughout the product lifecycle

- UV and Ozone Resistance: The material’s resistance to ultraviolet radiation and ozone prevents embrittlement and surface cracking, sustaining MC4 connector waterproofing and IP68 cable protection even after prolonged solar exposure

- Thermal Extremes Handling: Rated to endure wide temperature ranges, the sleeve retains elasticity and sealing force under extreme heat and cold, ensuring ongoing renewable energy sealing solutions in varied climates

- Chemical and Weather Resistance: The silicone rubber resists common contaminants and weathering agents, reducing degradation risk and extending service life compared with conventional polymer alternatives used for solar photovoltaic insulation

- Quick, Safe Installation: The cold shrink mechanism eliminates the need for torches or heat guns, lowering installation hazards while ensuring consistent MC4 connector waterproofing and IP68 cable protection with minimal skill requirements

Why Choose Volsun’s Silicone Rubber Cold Shrink Tubing

Volsun leverages two production bases, deep polymer expertise, and a strong patent portfolio to deliver advanced sealing products tailored for the solar market. The Silicone Rubber Cold Shrink Tubing IP68 Waterproof Insulation Sleeve for Solar Photovoltaic MC4 Connector is an engineered component that aligns performance with practical installation needs. It provides proven solar photovoltaic insulation, reliable MC4 connector waterproofing, IP68 cable protection, and renewable energy sealing solutions that reduce downtime, simplify field operations, and protect investments in photovoltaic infrastructure

Installation Guidance

- Prepare the site by ensuring connector and cable surfaces are clean and free of debris

- Slide the pre-expanded cold shrink sleeve over the connector assembly while it remains on the removable core

- Position the sleeve across the mated MC4 connector interface or cable junction

- Remove the core to allow the sleeve to recover and form a tight seal, achieving immediate solar photovoltaic insulation and MC4 connector waterproofing along with IP68 cable protection

Quality and Compliance

Backed by Volsun’s IATF 16949 and ISO 9001 certifications and extensive R&D capabilities, the cold shrink sleeve meets rigorous production and quality controls. It is manufactured to provide repeatable solar photovoltaic insulation performance and consistent MC4 connector waterproofing that conforms to industry expectations for renewable energy sealing solutions

Volsun’s Silicone Rubber Cold Shrink Tubing IP68 Waterproof Insulation Sleeve for Solar Photovoltaic MC4 Connector combines advanced silicone materials, a convenient cold shrink format, and IP68-rated protection to deliver a dependable solar photovoltaic insulation and MC4 connector waterproofing solution. Designed for durability and ease of use, it supports renewable energy sealing solutions across a wide range of photovoltaic applications, ensuring IP68 cable protection and long-term system reliability backed by Volsun’s proven manufacturing and technical expertise