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. 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