The first lightweight gypsum panel for superior moisture and mould resistance performance in a variety of interior construction applications. SHEETROCK UltraLight Mold Tough Drywall Gypsum Panels are extremely light, making them easy to lift and install. They’re perfect for moisture prone areas like bathrooms, basements and garages. Their noncombustible, moisture and mold-resistant core is encased in 100% recycled moisture and mold-resistant face and back papers.