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    • Duct Seals

    Line Blowing Duct Seals & Seal-Off Adapters

    Achieving an airtight seal is a critical step in any line blowing or cable installation project. At Contractors Utility Supply, we offer a robust selection of high-quality duct seals and seal-off adapters designed to maintain optimal pneumatic pressure and prevent air loss within your conduit systems. When you need to efficiently propel line, pull tape, or cable through underground ducts, our equipment ensures maximum airflow efficiency so your crew can work without interruption.

    We proudly stock industry-leading components from DCD, providing utility contractors with reliable, durable tooling for any job size. Our comprehensive inventory includes standard duct seals ranging from 2-1/2 inches up to 8 inches to accommodate a wide variety of conduit diameters. For versatile applications, we also carry complete seal-off kits, standalone seal-off bodies, and multi-size seal-off adapters—including 1/2" to 1-1/2", 1-1/2" to 3", and 2-1/2" to 6" variations.

    Built for rugged field conditions, these duct sealing solutions grip tightly to the inner walls of the conduit, ensuring a secure connection during high-pressure blowing operations. Browse our full collection of premium duct seals below to equip your crew with the precise, contractor-grade accessories needed for seamless line installation.

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