DuraBond

Drywall Durabond (USG Sheetrock Brand Durabond) is a powerful, powder-based, setting-type joint compound that chemically hardens quickly, offering superior strength, low shrinkage, and excellent humidity resistance for heavy fills, laminating gypsum panels, and base-coating joints, allowing for rapid, same-day finishing for drywall interiors and exterior soffits, though it's harder to sand and requires immediate tool cleaning due to its plaster-like hardness.