About Product
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RUBLS-EPDM a series of open-ended, tubular rubber sleeves, which are factory expanded and assembled onto a removable core. They are supplied for field installation in this pre-stretched condition. The core is removed after the tube has been positioned for installation over an in line connection, terminal lug, etc., allowing the tube to shrink and form a waterproof seal. The insulation tube is made of EPDM rubber, which contains no chlorides or sulphurs. Various diameter sizes will cover a range of 1000 volt cables, copper and aluminum conductors
Compared with the heat shrink tube, it has better resistance to weather and ultraviolet aging, and does not brittle after long-term use
Compared with silicone rubber cold shrinkable pipe, more puncture resistance, wear resistance, acid and alkali resistance
It can synchronize thermal expansion and contraction with the workpiece in the harsh environment, without producing gaps and sealing tightly
Even in a state of wind sway, it can still breathe synchronously with the workpiece, and the sealing effect remains excellent
Suitable for power cables below 1KV and a wide range of specification, and can be used in indoors and outdoors, overhead, water or buried occasions
Strong toughness and rebound resilience, maintaining a constant radial pressure and providing a tight seal for the cable in the long run
Easy installation without heating or special tools and no need for hot melt adhesive or tape to strengthen the seal at the joint
Standard color: Black
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 an advanced EPDM Rubber Cold Shrink Tube Waterproof Insulation Sleeve Cold Shrink Tubing for Power Cable Joint Protection that redefines field-ready solutions for cable maintenance, emergency repair, and long-term infrastructure resilience. Engineered to meet the rigorous demands of modern power distribution networks and designed for rapid, reliable installation, this cold shrink tubing product from Volsun integrates superior material science, practical form factor, and proven performance to deliver dependable power cable protection where it matters most.
Product Overview and Core Features
The cold shrink tubing offered by Volsun is manufactured from high-grade EPDM insulation formulated for exceptional elasticity, aging resistance, and environmental robustness. This EPDM insulation cold shrink product provides an optimal combination of flexibility, dielectric stability, and sealing performance. The cold shrink tubing features a pre-expanded sleeve that is stabilized on a removable core and readily contracts upon core removal to form a tight, uniform fit around irregular shapes and varied cable diameters. The waterproof joint sleeve design ensures consistent power cable protection by creating a continuous barrier against moisture ingress, contaminants, and corrosive agents. Quick to deploy and easy to handle, Volsun’s cold shrink tubing minimizes installation time while maximizing long-term reliability.
Material Advantages: EPDM Insulation Excellence
EPDM insulation in this cold shrink tubing provides several critical technical advantages for power cable protection. EPDM rubber is inherently resistant to ozone, UV radiation, and extreme temperatures, ensuring that the cold shrink tubing maintains elasticity and sealing force across diverse climates. The EPDM compound used in Volsun’s waterproof joint sleeve has been optimized for electrical insulation properties, providing reliable dielectric strength that complements the mechanical sealing performance. This EPDM insulation contributes to long service life and reduced maintenance cycles, making the cold shrink tubing a cost-effective measure for protecting power infrastructure assets from environmental degradation.
Waterproofing and Joint Protection Performance
As a waterproof joint sleeve, Volsun’s cold shrink tubing creates a high-integrity seal for cable joints and splices. The cold shrink tubing is designed to conform tightly to cable shapes and splice configurations, preventing water penetration and minimizing the risk of partial discharge or insulation failure. The waterproof joint sleeve is particularly valuable in underground, wet, or coastal installations where moisture and salt exposure accelerate degradation. Volsun’s manufacturing controls and material selection ensure that the waterproof cold shrink tubing remains dimensionally stable and retains sealing pressure for extended periods, enabling effective power cable protection in both permanent and temporary installations.
Ease of Installation and Field Efficiency
One of the most important attributes of cold shrink tubing is rapid installation without the need for heat, special tools, or lengthy curing times. Volsun’s EPDM cold shrink tubing requires only the removal of the inner core to achieve full recovery around the cable joint. This simplifies logistics and reduces safety risks compared with heat-shrink solutions, which demand hot-air tools or open flames. Technicians can apply the cold shrink tubing quickly in confined spaces or live environments, improving uptime for critical power systems. The waterproof joint sleeve design is forgiving and accommodates varying joint geometries, which reduces rework and ensures consistent results even under time pressure.
Applications Across Power and Telecommunications
Volsun’s cold shrink tubing is tailored for multiple sectors requiring robust power cable protection. In power distribution and transmission systems, the waterproof joint sleeve is ideal for insulating medium-voltage and low-voltage cable joints, terminations, and accessories. Utility crews benefit from the cold shrink tubing’s fast application during outages and routine maintenance. Telecom operators use the waterproof joint sleeve to shield critical feeder lines and cable splices from moisture-related faults. The cold shrink tubing is also suited for industrial environments, renewable energy installations, and transportation infrastructure where durable EPDM insulation contributes to prolonged operational reliability.
Compliance, Quality, and Manufacturing Credibility
Backed by Volsun’s decade-long expertise and recognized R&D capabilities, the cold shrink tubing adheres to stringent quality management processes. Volsun’s facilities operate under IATF 16949/ISO 9001 frameworks, and the company’s polymer engineering know-how ensures consistent EPDM insulation performance. The cold shrink tubing benefits from Volsun’s patent portfolio, quality controls, and manufacturing discipline, delivering predictable product attributes across production batches. Customers receive a waterproof joint sleeve and cold shrink tubing solution that aligns with professional installation standards and long-term asset protection goals.
Adaptability and Customization Options
Recognizing diverse installation requirements, Volsun offers customization for cold shrink tubing dimensions, wall thicknesses, and hardness levels to match specific power cable protection needs. The EPDM insulation compound can be formulated with tailored mechanical or electrical properties for specialized applications. OEM and project customers can work with Volsun to specify lengths, diameters, and kit configurations that address unique splice types, multi-core bundles, or environmental constraints. This adaptability makes Volsun’s waterproof joint sleeve an attractive option for utilities, EPC contractors, and equipment manufacturers seeking reliable cold shrink tubing solutions.
Innovation and Technical Differentiators
Several innovation points distinguish Volsun’s cold shrink tubing in the market. First, the EPDM insulation compound is optimized for a balance of recovery force and long-term elasticity, ensuring that the cold shrink tubing maintains a secure seal over years of service. Second, the waterproof joint sleeve design incorporates profiles and adhesive-less sealing geometry that reduce reliance on additional sealing materials while maintaining excellent protection. Third, Volsun’s manufacturing precision guarantees consistent pre-expansion and controlled shrink-back behavior, enabling predictable installation outcomes and reduced field failure rates. These technical differentiators combine to elevate the cold shrink tubing’s overall effectiveness for power cable protection.
Economic and Operational Benefits
Investing in Volsun’s EPDM cold shrink tubing yields measurable benefits for asset owners and installation teams. The ease of application reduces labor hours and the need for specialized tools, lowering installation costs and improving crew productivity. The waterproof joint sleeve’s durable EPDM insulation reduces the frequency of service interventions and mitigates costly cable failures, enhancing system availability. For large-scale deployments, the predictable performance of cold shrink tubing contributes to better lifecycle planning and lower total cost of ownership for power cable protection programs.
Volsun’s EPDM Rubber Cold Shrink Tube Waterproof Insulation Sleeve Cold Shrink Tubing for Power Cable Joint Protection is a high-performance, field-proven solution designed to meet contemporary demands for reliable, efficient, and durable cable joint protection. Combining advanced EPDM insulation, robust waterproofing, easy installation, and manufacturing excellence, this cold shrink tubing and waterproof joint sleeve deliver superior power cable protection across utility, telecom, industrial, and renewable energy applications. With Volsun’s strong technical foundation and global manufacturing capacity, customers gain access to a trusted cold shrink tubing partner capable of supporting large-scale and mission-critical deployments.
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