BASF MasterEmaco A 660 is an acrylic-polymer emulsion which strengthens the adhesion, physical properties and durableness of Portland cement mortars, plasters, stucco, and concrete mixes. MasterEmaco A 660 acrylic polymer significantly improves adhesion, cohesion, tensile, compressive, and flexural strengths of cement-based materials. This product's excellent chemical and UV resistance promotes long-lasting repairs and improves freeze/thaw stability of Portland cement-based materials for stamina and durability in cold climates. A 660 retains stability when exposed to water for long term performance of repairs. Also available in 5 gallon pails.