Suzhou Volsun Electronics Technology Co., Ltd.
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RUBLS-BKT
VOLSUN
The Waterproof Cold Shrink Cable Boot represents a paradigm shift in cable termination technology, providing reliable environmental sealing for electrical connections without requiring heat sources or specialized tools. This silicone rubber boot combines IP68 waterproof rating with exceptional dielectric properties, making it indispensable for protecting cable joints and terminations in harsh outdoor and underground environments . Its innovative cold shrink design enables quick, consistent installation even in confined spaces, ensuring long-term protection against moisture, dust, and mechanical damage in critical electrical infrastructure.
Constructed from high-grade silicone rubber, the boot achieves an IP68 ingress protection rating, ensuring complete protection against dust ingress and continuous submersion in water up to 1.5 meters . Its UV-stable formulation resists ozone degradation and weathering, maintaining flexibility and sealing performance after prolonged outdoor exposure. The material's hydrophobic properties prevent water absorption, ensuring reliable insulation in wet environments.
Rated for 15 kV applications, the cold shrink boot provides excellent electrical insulation with dielectric strength exceeding 20 kV/mm . It meets IEC 60529 standards for ingress protection and IEC 60243 for dielectric performance, ensuring compliance with global electrical safety regulations. The boot's uniform wall thickness ensures consistent electrical performance across the entire termination area.
Featuring a 1.11 inch to 0.25 inch (28 mm to 6.4 mm) shrink range, the boot accommodates various cable diameters with a snug, uniform fit . Its pre-expanded design with removable support core enables tool-free installation—simply position the boot and pull the core to activate shrinkage. This eliminates the need for heat guns or torches, making it ideal for hazardous locations or areas with fire restrictions.
Category | Specification | Value | Test Method |
Environmental Rating | Ingress Protection | IP68 | IEC 60529 |
Electrical Properties | Voltage Rating | 15 kV | IEC 60840 |
Dielectric Strength | >20 kV/mm | IEC 60243-1 | |
Material Properties | Base Material | Silicone Rubber | ASTM D2000 |
Operating Temperature Range | -55°C to 125°C | ASTM D638 | |
Shore Hardness | 60 ±5 Shore A | ISO 868 | |
Installation Data | Shrink Range | 1.11" to 0.25" | Manufacturer Test |
Installation Method | Cold Shrink (No Tools) | N/A | |
Maximum Cable Diameter | 28 mm (1.11") | Manufacturer Spec |
Protects fiber optic and copper cable terminations in outdoor cabinets, aerial lines, and underground vaults. Its waterproof design ensures reliable signal transmission in rainy or flooded conditions common in telecommunications infrastructure.
Seals medium-voltage cable joints and terminations in underground distribution networks, pad-mounted transformers, and outdoor switchgear. The boot's dielectric properties make it suitable for 15kV distribution lines in utility applications.
Essential for protecting cable connections in solar farms, wind turbines, and battery energy storage systems. Withstands the temperature extremes and weather exposure typical of renewable energy sites.
Seals cable terminations in railway signaling systems, traffic control equipment, and highway lighting installations. Its vibration resistance ensures continued performance in dynamic transportation environments.
Cold shrink technology eliminates the need for heat sources, enabling safer installation in hazardous locations and confined spaces where open flames are prohibited . It provides more uniform pressure distribution across the cable surface, ensuring consistent sealing without hot spots that can damage cable insulation.
The silicone rubber formulation maintains permanent elasticity, allowing the boot to accommodate thermal expansion and contraction of cables without losing sealing pressure . Its chemical resistance prevents degradation from ozone, UV radiation, and environmental pollutants, ensuring IP68 performance for 20+ years in typical applications.
No, the cold shrink design is intended for one-time use only. Once the support core is removed and the boot has contracted, it cannot be re-expanded without damaging the material structure. This ensures a secure, permanent seal that won't loosen over time.
The boot is designed for use with power cables, communication cables, and coaxial cables including LMR-600 to SPX-250 types . It accommodates both insulated and jacketed cables within its 1.11" to 0.25" diameter range, with specific versions available for different cable constructions .
Item | Typical value | Test method |
Shore hardness | 40±2A | GB/T531 |
Tensile strength | ≥7.2MPa | GB/T528 |
Elongation at break | ≥600% | GB/T528 |
Tearing strength | ≥30kN/m | GB/T529 |
Volume resistivity | ≥2×1014Ω.cm | GB/T1692-1992 |
Two-cores cold shrink breakout dimension
Size | Number of cores | ΦC | Application Range （mm) | ΦF | Application Range(mm) | LF(mm) | Lc(mm) |
WCSF2-1(1#) | 2 | 47 | Φ23-Φ37 | 20 | Φ8-Φ15 | 35 | 100 |
WCSF2-2(2#) | 65 | Φ30-Φ55 | 25 | Φ10-Φ20 | 35 | 110 | |
WCSF2-3(3#) | 80 | Φ34-Φ67 | 32 | Φ15-Φ25 | 35 | 120 | |
WCSF2-4(4#) | 110 | Φ44-Φ95 | 47 | Φ20-Φ40 | 35 | 130 |
Three-cores cold shrink breakout dimension
Size | Number of cores | ΦC | Application Range （mm) | ΦF | Application Range(mm) | LF(mm) | Lc(mm) |
WCSF3-（-1）(1#) | 3 | 56 | Φ30-Φ43 | 20 | Φ10-Φ15 | 35 | 105 |
WCSF3-（-2）(2#) | 65 | Φ36-Φ55 | 25 | Φ13-Φ20 | 35 | 125 | |
WCSF3-1(1#) | 80 | Φ46-Φ67 | 32 | Φ19-Φ26 | 45 | 130 | |
WCSF3-2(2#) | 88 | Φ54-Φ78 | 35 | Φ21-Φ31 | 45 | 135 | |
WCSF3-3(3#) | 104 | Φ62-Φ90 | 40 | Φ25-Φ33 | 45 | 150 | |
WCSF3-4(4#) | 120 | Φ72-Φ105 | 47 | Φ31-Φ40 | 45 | 165 | |
WCSF3-5(5#) | 140 | Φ88-Φ120 | 60 | Φ36-Φ52 | 55 | 180 | |
WCSF3-5A1(6#) | 150 | Φ88-Φ128 | 65 | Φ36-Φ57 | 55 | 180 | |
WCSF3-5A2(7#) | 165 | Φ88-Φ138 | 70 | Φ36-Φ62 | 55 | 180 |
Size | Number of cores | ΦC | Application Range （mm) | ΦF | Application Range （mm) | LF(mm) | Lc(mm) |
WCSF4-1(1#) | 4 | 60 | Φ26-Φ25 | 20 | Φ10-Φ14 | 35 | 126 |
WCSF4-2(2#) | 70 | Φ36-Φ55 | 25 | Φ12-Φ17 | 40 | 137 | |
WCSF4-3(3#) | 88 | Φ51-Φ75 | 32 | Φ14-Φ25 | 40 | 145 | |
WCSF4-4(4#) | 120 | Φ56-Φ92 | 47 | Φ19-Φ40 | 40 | 160 |
Five-cores cold shrink breakout dimension
Size | Number of cores | ΦC | Application Range （mm) | ΦF | Application Range （mm) | LF(mm) | Lc(mm) |
WCSF5-1(1#) | 5 | 70 | Φ36-Φ62 | 20 | Φ10-Φ14 | 40 | 123 |
WCSF5-2(2#) | 88 | Φ46-Φ73 | 25 | Φ12-Φ17 | 40 | 134 | |
WCSF5-3(3#) | 110 | Φ59-Φ95 | 35 | Φ16-Φ27 | 45 | 138 | |
WCSF5-4(4#) | 120 | Φ59-Φ100 | 40 | Φ16-Φ32 | 45 | 138 |
The Waterproof Cold Shrink Cable Boot represents a paradigm shift in cable termination technology, providing reliable environmental sealing for electrical connections without requiring heat sources or specialized tools. This silicone rubber boot combines IP68 waterproof rating with exceptional dielectric properties, making it indispensable for protecting cable joints and terminations in harsh outdoor and underground environments . Its innovative cold shrink design enables quick, consistent installation even in confined spaces, ensuring long-term protection against moisture, dust, and mechanical damage in critical electrical infrastructure.
Constructed from high-grade silicone rubber, the boot achieves an IP68 ingress protection rating, ensuring complete protection against dust ingress and continuous submersion in water up to 1.5 meters . Its UV-stable formulation resists ozone degradation and weathering, maintaining flexibility and sealing performance after prolonged outdoor exposure. The material's hydrophobic properties prevent water absorption, ensuring reliable insulation in wet environments.
Rated for 15 kV applications, the cold shrink boot provides excellent electrical insulation with dielectric strength exceeding 20 kV/mm . It meets IEC 60529 standards for ingress protection and IEC 60243 for dielectric performance, ensuring compliance with global electrical safety regulations. The boot's uniform wall thickness ensures consistent electrical performance across the entire termination area.
Featuring a 1.11 inch to 0.25 inch (28 mm to 6.4 mm) shrink range, the boot accommodates various cable diameters with a snug, uniform fit . Its pre-expanded design with removable support core enables tool-free installation—simply position the boot and pull the core to activate shrinkage. This eliminates the need for heat guns or torches, making it ideal for hazardous locations or areas with fire restrictions.
Category | Specification | Value | Test Method |
Environmental Rating | Ingress Protection | IP68 | IEC 60529 |
Electrical Properties | Voltage Rating | 15 kV | IEC 60840 |
Dielectric Strength | >20 kV/mm | IEC 60243-1 | |
Material Properties | Base Material | Silicone Rubber | ASTM D2000 |
Operating Temperature Range | -55°C to 125°C | ASTM D638 | |
Shore Hardness | 60 ±5 Shore A | ISO 868 | |
Installation Data | Shrink Range | 1.11" to 0.25" | Manufacturer Test |
Installation Method | Cold Shrink (No Tools) | N/A | |
Maximum Cable Diameter | 28 mm (1.11") | Manufacturer Spec |
Protects fiber optic and copper cable terminations in outdoor cabinets, aerial lines, and underground vaults. Its waterproof design ensures reliable signal transmission in rainy or flooded conditions common in telecommunications infrastructure.
Seals medium-voltage cable joints and terminations in underground distribution networks, pad-mounted transformers, and outdoor switchgear. The boot's dielectric properties make it suitable for 15kV distribution lines in utility applications.
Essential for protecting cable connections in solar farms, wind turbines, and battery energy storage systems. Withstands the temperature extremes and weather exposure typical of renewable energy sites.
Seals cable terminations in railway signaling systems, traffic control equipment, and highway lighting installations. Its vibration resistance ensures continued performance in dynamic transportation environments.
Cold shrink technology eliminates the need for heat sources, enabling safer installation in hazardous locations and confined spaces where open flames are prohibited . It provides more uniform pressure distribution across the cable surface, ensuring consistent sealing without hot spots that can damage cable insulation.
The silicone rubber formulation maintains permanent elasticity, allowing the boot to accommodate thermal expansion and contraction of cables without losing sealing pressure . Its chemical resistance prevents degradation from ozone, UV radiation, and environmental pollutants, ensuring IP68 performance for 20+ years in typical applications.
No, the cold shrink design is intended for one-time use only. Once the support core is removed and the boot has contracted, it cannot be re-expanded without damaging the material structure. This ensures a secure, permanent seal that won't loosen over time.
The boot is designed for use with power cables, communication cables, and coaxial cables including LMR-600 to SPX-250 types . It accommodates both insulated and jacketed cables within its 1.11" to 0.25" diameter range, with specific versions available for different cable constructions .
Item | Typical value | Test method |
Shore hardness | 40±2A | GB/T531 |
Tensile strength | ≥7.2MPa | GB/T528 |
Elongation at break | ≥600% | GB/T528 |
Tearing strength | ≥30kN/m | GB/T529 |
Volume resistivity | ≥2×1014Ω.cm | GB/T1692-1992 |
Two-cores cold shrink breakout dimension
Size | Number of cores | ΦC | Application Range （mm) | ΦF | Application Range(mm) | LF(mm) | Lc(mm) |
WCSF2-1(1#) | 2 | 47 | Φ23-Φ37 | 20 | Φ8-Φ15 | 35 | 100 |
WCSF2-2(2#) | 65 | Φ30-Φ55 | 25 | Φ10-Φ20 | 35 | 110 | |
WCSF2-3(3#) | 80 | Φ34-Φ67 | 32 | Φ15-Φ25 | 35 | 120 | |
WCSF2-4(4#) | 110 | Φ44-Φ95 | 47 | Φ20-Φ40 | 35 | 130 |
Three-cores cold shrink breakout dimension
Size | Number of cores | ΦC | Application Range （mm) | ΦF | Application Range(mm) | LF(mm) | Lc(mm) |
WCSF3-（-1）(1#) | 3 | 56 | Φ30-Φ43 | 20 | Φ10-Φ15 | 35 | 105 |
WCSF3-（-2）(2#) | 65 | Φ36-Φ55 | 25 | Φ13-Φ20 | 35 | 125 | |
WCSF3-1(1#) | 80 | Φ46-Φ67 | 32 | Φ19-Φ26 | 45 | 130 | |
WCSF3-2(2#) | 88 | Φ54-Φ78 | 35 | Φ21-Φ31 | 45 | 135 | |
WCSF3-3(3#) | 104 | Φ62-Φ90 | 40 | Φ25-Φ33 | 45 | 150 | |
WCSF3-4(4#) | 120 | Φ72-Φ105 | 47 | Φ31-Φ40 | 45 | 165 | |
WCSF3-5(5#) | 140 | Φ88-Φ120 | 60 | Φ36-Φ52 | 55 | 180 | |
WCSF3-5A1(6#) | 150 | Φ88-Φ128 | 65 | Φ36-Φ57 | 55 | 180 | |
WCSF3-5A2(7#) | 165 | Φ88-Φ138 | 70 | Φ36-Φ62 | 55 | 180 |
Size | Number of cores | ΦC | Application Range （mm) | ΦF | Application Range （mm) | LF(mm) | Lc(mm) |
WCSF4-1(1#) | 4 | 60 | Φ26-Φ25 | 20 | Φ10-Φ14 | 35 | 126 |
WCSF4-2(2#) | 70 | Φ36-Φ55 | 25 | Φ12-Φ17 | 40 | 137 | |
WCSF4-3(3#) | 88 | Φ51-Φ75 | 32 | Φ14-Φ25 | 40 | 145 | |
WCSF4-4(4#) | 120 | Φ56-Φ92 | 47 | Φ19-Φ40 | 40 | 160 |
Five-cores cold shrink breakout dimension
Size | Number of cores | ΦC | Application Range （mm) | ΦF | Application Range （mm) | LF(mm) | Lc(mm) |
WCSF5-1(1#) | 5 | 70 | Φ36-Φ62 | 20 | Φ10-Φ14 | 40 | 123 |
WCSF5-2(2#) | 88 | Φ46-Φ73 | 25 | Φ12-Φ17 | 40 | 134 | |
WCSF5-3(3#) | 110 | Φ59-Φ95 | 35 | Φ16-Φ27 | 45 | 138 | |
WCSF5-4(4#) | 120 | Φ59-Φ100 | 40 | Φ16-Φ32 | 45 | 138 |
