PPG Industries: Bringing innovation to the surface
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HSP-7401 series is a polyurethane primer which offers the adhesion to composite substrate, flexibility and profile-filling properties required in wind turbine blade finishing operations. Additionally, HSP-7401 may be top-coated in a little as 30 minutes, which reduces cycle time and speeds throughput.

The product is designed for spray application and is compatible with a wide array of equipment, including robotic equipment. HSP-7401 may also be roller-applied. Its flow and leveling properties work together with PPG’s proprietary topcoat technology to produce an ultra-smooth surface which enhances turbine energy output.

HSP-7401 has been thoroughly tested as a system with PPG’s AUE-50000 series erosion-resistant polyurethane topcoat, producing outstanding results at reduced overall film thickness.

HSP-7401 Data Sheet


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Nippon Electric Glass (NEG, Head Office: Japan) has acquired PPG’s glass fiber business in Europe and USA. The business is now referred to as Electric Glass Fiber America (USA), Electric Glass Fiber UK (UK), and Electric Glass Fiber NL (The Netherlands), part of NEG. The products and technical information contained in this ppgfiberglass.com website are still valid, and will soon be transitioned to the website of NEG.