Henry 12366 547 UniPro Universal Patch and Skimcoat, 10 LbHighlights: Size : 10 Lb Compressive Strength : 5000 Psi Drying Time : 60 Min Functional Cure : 48 Hr Powder form Cement Based 547 UniPro series Use for preparing substrates to accept flooring For use as a patch, underlayment, or embossing leveler Use with almost any substrate Fast setting Ready for most floors in 1 2 hours Non sanded formula trowels easily for a smooth finish Non shrinking Reduces installation time Exceeds 5000 PSI compressive