Can this be used to level a subfloor under a shower pan.
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Thank you for posting your inquiry. DAP Presto Patch (and similar plaster/gypsum patching compounds) are not internally moisture resistant and are not the best choice for patching/repairs that may be subject to moisture. For application that may be subject to moisture, the use of a dry-mix portland cement based patching compound would typically be recommended. Should you have any additional questions or require further assistance, please contact DAP’s Technical Customer Service Department at 888-327-8477.
