EPCO’s Thick Wall Heat Shrink Tubing (HST) is designed to dielectrically insulate and encapsulate electrical connections, providing reliable protection in harsh environments. The tubing features an internal adhesive and sealant that melts when heated, creating a moisture- and soil-resistant seal for long-lasting performance. The standard color is black, suitable for a wide range of applications. 

UL Listed for Direct Burial – File #E123896, ensuring safety and compliance for underground installations. EPCO Thick Wall Heat Shrink Tubing (HST) delivers NEC-compliant, UL-listed, and labor-saving insulation for contractors, electricians, and engineers, ensuring safe, durable, and environmentally resistant electrical connections. 

BENEFITS 

EPCO’s Thick Wall Heat Shrink Tubing (HST) provides durable, NEC-compliant insulation for electrical connections, saving labor and ensuring long-term protection in harsh environments. 

• NEC 2026 Compliant – Meets Articles 110.14(B) and 300.5(C)(E) for electrical safety.
• UL Listed for Direct Burial – File #E123896 ensures compliance for underground installations in the U.S. and Canada.
• Labor-Saving Installation – Installs and shrinks quickly for fast, efficient protection of connections.
• Wide Shrink Range – 3:1 shrink ratio accommodates more cable sizes, reducing the number of tubing sizes needed.
• Environmental Protection – Resists moisture, soil, UV, fungi, corrosion, and abrasion for long-term durability.
• Reliable Sealing – Internal adhesive melts to form a moisture- and soil-resistant bond around connections.
• Versatile Applications – Ideal for residential, commercial, industrial, solar, telecommunications, and utility projects. 

FEATURES 

EPCO’s Thick Wall HST is engineered for durable insulation, labor savings, and NEC-compliant protection.

• Moisture & Soil Resistant – Internal adhesive melts during heating to seal connections against environmental exposure.
• Durable Material – Provides abrasion, corrosion, UV, and fungi resistance for long-lasting performance.
• Standard Black Color – Suitable for a variety of commercial, residential, and industrial electrical installations.
• Effective for Large Transitions – Ideal for splices, terminals, and connectors, including critical transition points.  

TYPICAL APPLICATIONS 

• Direct Burial Electrical Connections – Ideal for insulating and sealing splices and terminations in underground power distribution.
• Feeder and Service Cable Protection – Provides a moisture- and soil-resistant barrier for large-gauge conductor transitions.
• Industrial & Commercial Installations – Perfect for protecting high-voltage connections in panels, switchgear, and control systems.
• Renewable Energy Projects – Used in solar, wind, and energy storage systems to protect cable terminations exposed to harsh environments.
• Outdoor & Harsh Environment Installations – UV- and fungus-resistant tubing ensures long-term performance for exposed electrical connections.
• Utility & Infrastructure Projects – Ensures safe, code-compliant insulation for conductors in vaults, substations, and transformers.