The Gund Company RotoGuard®

The Gund Company understands the demanding operating environment of power turbogenerators as well as the scheduling challenges associated with generator re-wind projects. Our generator application and engineering teams have over 100 years of experience solving generator insulation and schedule challenges. Rotoguard® has been used by repair and OEM customers for more than 15 years and is the primary insulation found in more than 300 fields in service today.

The Gund Company’s aerospace manufacturing process results in the production of high-quality slot armor. Rotoguard® is the most uniform and consistent slot insulation commercially available today. The result is a series of high-quality generator insulation products that save installation and schedule time and help prevent premature failure.


Rotoguard® Slot Liner – Slot Armor

Slot Armor that contains voids and other defects can lead to premature failure, resulting in an emergency, unplanned outages or rework. The Gund Company’s aerospace manufacturing process results in the production of high-quality Rotoguard® Slot Armor is the most uniform and consistent slot insulation commercially available today.

RotoGuard® Slot Armor is available in five standard configurations as well as a variety of custom configurations to meet customer specifications. Each part is 100% inspected for quality and continuity and can be hipot tested up to 20 kV.

Common Shapes: L’s, U’s, Step, Club Foot, and specialty shapes available upon request. Click here to review material data sheet.


Rotoguard® EG – Turn Insulation

RotoGuard® TIB* is a pressure sensitive epoxy adhesive that can enhance the performance of RotoGuard® EG, Nomex® 410, and other insulation materials. RotoGuard® TIB bonds to copper with excellent shear strength at room temperatures, and up to 160 °C. This turn insulation adhesive offers distinct advantages over traditional b-stage epoxy turn insulation. The superior tackiness of our TIB eliminates the time, labor, and material cost associated with using additional adhesives, such as double stick tape and messy resins. Its 4-hour, 110°C epoxy adhesive cure time shortens outage and rewind project duration.

Turn insulation coated with RotoGuard® TIB has undergone tensile shear strength testing (cross-head speed 0.15 in/min.) and produced results exceeding 100 psi (0.69 MPA). RotoGuard® Turn Insulation, equipped with RotoGuard® TIB adhesive can be peeled up and re-applied to ensure proper seating and alignment with the copper. RotoGuard® TIB from The Gund Company is a Class F insulating material (meets 155 °C) when cured. The Gund Company custom fabricates corner strips, J-strips, and vented insulation for a complete slot insulation kit.

Availability: 36” Wide Rolls
Available Thickness: 0.005” (0.13mm), 0.007” (0.18 mm), 0.010” (0.25 mm) & 0.013” (0.33 mm)

RotoGuard® Data Sheets

> RotoGuard® Epoxy Glass Material Data Sheet
> RotoGuard® Slot Insulation Material Data Sheet
> RotoGuard® Line Card
> RotoGuard® TIB Material Data Sheet
> RotoGuard® TIB Application Instructions
Contact Us: generators@thegundcompany.com

Slot Insulation Kits

  • Slot Cells
  • Sub-slot Insulation
  • Turn Insulation / Layer Insulation / Coil Insulation
  • Slot Caps

Full Rotor Kits

  • Slot Cells
  • Sub-slot Insulation
  • Turn Insulation / Layer Insulation / Coil Insulation
  • Slot Caps
  • J-strips / End Turn Insulation
  • Creepage Blocks
  • Top Filler
  • Rotor Blocking
  • Retaining Ring Insulation

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The Gund Company is a vertically integrated manufacturer and fabricator of engineered material solutions. We have been in business since 1951 and know what it takes to serve the demands of our customers’ most demanding applications. The Gund Company is an ISO 9001:2015 Manufacturer. We are AS9100D Certified and ITAR Compliant. As a lean enterprise, we are focused on continuous improvement and finding the most cost-effective, efficient solutions for our customers.

Please let us know if we can help answer material property questions or provide an application specific quote. Thanks in advance for the opportunity to earn your business.