EASY SAND 90 PATCH COMPOUND 18# | Sheetrock Brand Easy Sand Joint compounds provide low shrinkage and great bond, which make them excellent for laminating gypsum panels to gypsum panels, sound deadening boards and above-grade concrete surfaces. They resist humidity and can be applied in damp weather allowing for same day joint finishing and faster job completion and are available in a range of formulations that provide a choice in setting times from 8 mins to 3 hrs.