ISI Seam 470 ensures optimal weather-tightness and long-term performance. Using 360-degree seaming technology, it tightly interlocks male and female panels to prevent water penetration in high wind uplift. Optional machine-applied sealant at side laps enhances water tightness. Visible transverse flutings increase panel capacity, and the higher profile accommodates efficient water flow. On-site roll-forming machine available upon request.