Mainstay ML-72P is a polymer modified mortar used on new or mildly deteriorated concrete structures. It fills bugholes and irregularities on new concrete and repairs concrete surfaces roughened by the effects of mild corrosion. This low permeability mortar bonds tightly to concrete and provides a smooth finish suitable for the application of a protective coating, such as Mainstay DS-5 100% Solids Epoxy Coating.

Mainstay ML-72F product data PDF Download our product detail sheet (46 KB, opens in separate window).

Product Overview

Mortar Type

Blend of cements, silica fume, thermoplastic fibers, modifiers, and polymer admixture


65 pound bag; special packaging available

Mix Water

Up to 1.3 gallons per bag


0.54 cubic feet per bag when mixed correctly

Compressive Strength

8,000 pounds per square inch in 28 days (ASTM C-109)


0% after 28 days at 90% relative humidity (ASTM C-490)

Application Equipment

Contact us regarding information on the proper equipment to apply this product.