About POLY-SET® HD
If you’re still using concrete for setting your road signs and other in-ground structures, let Utility Structural Systems show you how POLY-SET® HD can save you time and money. Located in Houston, TX, our POLY-SET® HD is lightweight and easy to transport—no mixing trucks needed. One person can mix and pour the POLY-SET® HD into the void. In minutes, POLY-SET® HD rises to 8.5 times its original volume and creates a permanent backfill, allowing the linemen to set many posts in one day.
POLY-SET® HD is a uniquely engineered high-density polyurethane backfill that was originally designed over 30 years ago to help the utility industry solve the problems they faced setting transmission and distribution poles in poor soil conditions. We improved the original POLY-SET® formulation and created POLY-SET® HD that was tested by the Texas Transportation Institute (TTI) and approved for use by the Texas Department of Transportation for sign support applications. The timing is right for you to see how POLY-SET® HD can save you both time and money.
How It Works: POLY-SET® HD is a specially modified, high-density, polyurethane product that, when properly prepared, transforms the two-part liquid components into a tightly packed, well-anchored foundation in minutes.
Why It Works: POLY-SET® HD expands up to 8.5 times its original volume and actually contours to the shape of the excavated area, essentially locking itself and the structure in place. The tightly packed molecular structure of POLY-SET® HD increases the bearing surface of the embedded structure by making the post part of the foundation.
Why It Lasts: Unlike alternative backfill materials, POLY-SET® HD is resistant to moisture as a result of its closed-cell structure. Compared to conventional approaches, it’s more resistant to heat, cold, and micro-bacterial attacks. By encapsulating the post, POLY-SET® HD acts as a protective shield against environmental elements.
Product Availability: POLY-SET® HD and other POLY-SET® products are readily available, and most orders ship within five business days from receipt of a verified purchase order.
POLY-SET HD Products We Offer:
POLY-SET® HD is water insensitive and can be used in adverse soil conditions:
- Wet or dry Soil Conditions
- Sandy Soils
- Rocky Conditions
POLY-SET® HD Specifications

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