Highline Products


Three-Phase Transformer Pad

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In addition to our high volume line of compression molded products, Highline uses an open mold spray-up process to create fiberglass transformer box pads, three-phase transformer pads, and ground sleeves that are available in many sizes and applications.

Our three-phase transformer pads have external ribs molded into all sides for great side-wall and vertical support. They are available in several sizes. Our transformer pads and ground sleeves are constructed of fire-retardant materials and are gel-coated for UV protection.



  • Step design built into side-wall around the perimeter provides resistance against deflection in buried position.
  • Constructed of fire-retardant materials. Combination of chopped glass spray-up and hand lay-up of woven roving glass reinforcement.
  • External ribs are molded into all sides for greater side-wall and vertical strength.
  • Heavy-duty reinforced fiberglass construction, stress areas strengthened with nonhydroscopic laminated reinforcing materials.
  • Smooth exterior surface for tamper resistance.
  • For added strength and rigidity the top is heavily reinforced.
  • Exterior color: Munsell #7GY3.29/1.5 Green.
  • Gel-coated exterior for superior protection against UV radiation and corrosion resistance.
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