Jahn M60 is a single-component, cementitious plaster that is engineered for use on new or existing brick or stone substrates. Jahn M60 can be altered to adhere to block or concrete. Jahn M60 may be applied as a ground coat or finished system in thickness ranging from 1/4 to 1 1/2. The Jahn System eliminates the need for the traditional three-part application process (brown, scratch, finish). The plaster exhibits a superior chemical bond to prepared substrates, without the addition of latex or acrylic bonding agents or additives, and performs in situations where previous methods and materials have failed due to repeated water and salt saturation. M60 is water based, thus environmentally and user safe with no solvent clean up or disposal problems.