BASF MasterEmaco N 427 is low- slump, fast setting, Portland-cement- based, multi-purpose smooth repair mortar for detailed fine architectural work. MasterEmaco N 427 does not require the use of forms or multilayered casting techniques. MasterEmaco N 427, formerly known as Emaco R 400 Architectural, has a non-sag consistency which allows it to be placed in 1" thick lifts, is smooth in consistency and blends with smooth textured concrete surfaces. BASF MasterEmaco N 427 is light gray in color which blends with most standard concrete surfaces. BASF MasterEmaco N 427 only requires the addition of potable water and can be mixed with MasterEmaco A 660 to increase high-performance properties.