Industrial Plastic Materials for Underground Duct Banks & Conduit Support Systems
Buy cut-to-size durable HDPE, PVC, ABS, and polypropylene solutions engineered for corrosion resistance, soil-load stability, and long-term protection of critical underground utility infrastructure.
Plastics are essential for conduit and duct support systems, providing a durable, non-corrosive, and lightweight solution for electrical and infrastructure applications. Their high impact strength, weather resistance, and excellent electrical insulation make them ideal for duct bank spacers, conduit spacers, and mounting brackets. Unlike metal alternatives, plastics resist moisture, chemicals, and UV exposure, ensuring long-term performance in harsh underground and outdoor environments. Plastics also reduce the risk of electrical conductivity and eliminate sharp edges or corrosion-related failures that can compromise worker safety. By reducing maintenance needs, preventing material degradation, and simplifying installation, plastics help optimize conduit and duct support systems for maximum efficiency and reliability.
Properties
- Corrosion, Moisture, & Chemical Resistance
- Electrical insulation properties
- High impact strength and Durability
- UV and Weather Resistance
- Compatible with metals and adhesives
- Lightweight
- Easy to install
- Cost effective
Applications
- Duct bank spacers and Bore spacers
- Conduit spacer bases and Intermediate spacers
- Underground conduit supports
- Pipe shoes
- Mounting brackets
- Conduit junction and Pull boxes
- Expansion joints
- Conduit hangers & Clamps
- Electrical and Fiber optic cable trays
- Handhole supports and Manhole covers
Industries
- Electrical & Power Distribution
- Transportation & Infrastructure
- Commercial & Industrial Construction
- Water & Wastewater Management
- Oil, Gas, & Petrochemical
- Mining & Heavy Equipment Operations
Corrosion-Resistant Material Solutions for Buried Utility & Duct Bank Environments
Interstate Advanced Materials delivers conduit and duct support system material solutions designed for durability and long-term performance in demanding underground and outdoor environments. These materials enhance system safety and reliability while reducing maintenance and installation costs across utility, construction, transportation, and energy infrastructure projects.
In trench installations, spacer cards offer a safer, more consistent alternative to traditional "stacking chair" methods. Made from reprocessed HDPE or fluted polypropylene, spacer cards provide uniform conduit alignment, load distribution, and separation. This prevents shifting, collapse, or conduit deformation during encasement, helping preserve system integrity over time and improving safety for workers during installation.
To further support conduit stabilization, Interstate Advanced Materials offers materials for conduit retaining devices (CRDs). CRDs are used in duct bank installations and underground utility vaults to keep conduit in place before encasement, improving structural reliability. These solutions streamline installation and improve efficiency on the job site.
Materials such as reprocessed HDPE, fluted polypropylene, and PVC Type 1 offer durable alternatives to wood and metal for various conduit and duct support applications. Reprocessed HDPE is ideal for conduit spacers, support rails, trench panels, and mounting plates, with toughness suited for direct burial in harsh soil. Fluted polypropylene is lightweight and water-resistant, making it well-suited for divider panels, conduit shims, bore spacers, and temporary shielding, while also allowing for easy on-site customization. PVC Type 1 supports wall-mounted brackets, cable trough dividers, and utility vault spacers, offering non-conductive, corrosion-resistant performance in buried and exposed environments.
Interstate Advanced Materials maintains strong partnerships with domestic extruders, ensuring steady supply and competitive pricing. Its long-standing relationships support fast delivery and product availability for large or time-sensitive projects, streamlining logistics and minimizing project delays.
Operating five processing machines across multiple shifts, the company delivers the production capacity and flexibility needed for fast turnarounds and consistent quality. This enables dependable support for projects with tight schedules or variable scopes.
Interstate Advanced Materials supplies material solutions that help contractors build safer, more efficient, and longer-lasting conduit and duct systems. To learn more about material solutions for underground conduit and duct support applications, call a material expert today at (888) 768-5759.
WARNING: The products on this page can expose you to chemicals including Polyvinyl Chloride, CAS 9002-86, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.
WARNING: The products on this page can expose you to chemicals including Acrylonitrile, CAS 107-13-1, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.
WARNING: The products on this page can expose you to chemicals including Styrene, CAS 100-42-5, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.
WARNING: The products on this page can expose you to chemicals including Ethylene Oxide, CAS 75-21-8, which are known to the State of California to cause cancer. For more information go to www.p65warnings.ca.gov.
WARNING: The products on this page can expose you to chemicals including Ethylene Oxide, CAS 75-21-8, which are known to the State of California to cause birth defects or other reproductive harm. For more information go to www.p65warnings.ca.gov.
