Platinum Formula HS 2:1 Polyurethane “Radium” Clearcoat — Made in the USA. High-Solids Build (HS). · Premium HS (High Solids) clearcoat. Wet-looking gloss with a smooth, premium feel. It’sMade in the USA, it’s ourPlatinum Formula, and it’s built for painters who want their clear to look expensive—because itis.