Windgap Bridge

The Windgap Bridge in Pittsburgh, Penn. was painted in 1986 with Tnemec polyurethane coatings. While the original specification called for a phenolic zinc-rich primer, Tnemec’s local coating consultant spoke with the contractor and engineer about a new Tnemec moisture-cured, zinc-rich urethane, Series 90-97 Tneme-Zinc. Benefits of Series 90-97 included superior corrosion resistance, a more user-friendly application and better curing tolerance at lower temperatures. All parties agreed to the change, and one of the first Series 90-97 projects was under way.

The photographs to the left were taken in 2007. After 20 years of service, the Tneme-Zinc/epoxy/polyurethane system is still performing extremely well. Note the gloss of the 20-year-old Endura-Shield finish coat.

The bottom photo shows the signs of an inspection that occurred in 1989. Note the reddish-gray Series 90-97 that was left un-topcoated for 18 years. No corrosion has occurred other than where Series 90-97 was scratched away during destructive cross-hatch or Tooke gauge inspections. The confined rusting and lack of undercutting are a testament to the galvanic protection capabilities of Series 90-97 Tneme-Zinc.

Reports from a 2007 professional inspection indicate that many more years of service life can be expected.

    Project Information

    Pittsburg, PA


    Pennsylvania Department of Transportation

    Printer Friendly Version


    Contact Your Rep

    Looking for Some Local Coatings Guidance?

    Reach out to one of our knowledgable and reliable representatives near you.

    Sustainable Building

    Need Coatings for LEED Projects?

    Tnemec offers a long list of low VOC coatings built to protect sustainable structures.

    How to Purchase

    Ready to Order Tnemec?

    We're ready to help. Click below to learn more about our purchasing process.

    Continue Exploring in the color tool


    Color Swatch packet

    When you finish selecting, request your Swatch Packet below. Expect your swatch cards in 5-7 business days. Contact your expert Sales Rep at any time.

    Sorry, there is a maximum of 6 color swatches.

    Request swatch packet

    Continue Exploring in the color tool