Repairs any drywall, plaster, or wood surface. Fast setting. Easily cut for custom fit. First coat of compound is already on the patch, just Wet & Set . Once wet, this super durable patch can be used to cover holes, cracks, or imperfections in flat, curved, or uneven surfaces. Sets in less than 15 minutes and ready for a second coat of compound or spackle. Strong adhesion prevents delamination and shifting.