Pabco Systems - 5/8" QUIETROCK 530 Gypsum Panel, 4' x 8' QuietRock 530 is a high-performance sound dampening gypsum panel that delivers noise reduction and impact resistance. The panel is UL fire-resistance rated, STC-rated, shear-rated, and impact-resistant. Benefits are: Delivers STC ratings of 52-74 Fire rating equivalent to Type X; UL fire-rated Hangs & finishes like standard drywall Shear-rated (average 487 lbs/ft) Tested in accordance with IEE 2999-1097 Continues to reduce noise even with fixtures installed (lights/shelves) Data Sheet