The problem of how to obtain a predictable exposed aggregate architectural finish has bothered contractors and architects alike for some time. Such finishes have always required special mix designs, rigid control over form leakage, special placement methods and either abrasive blasting, acid etching or the use of a surface retarder to reveal the aggregate. Depending on the care exercised by everyone involved, the results can be dramatically good or dramatically bad. Now a Denver based form liner manufacture has developed a simple alternative that may remove much of the guesswork and cost involved in site-cast exposed aggregate finishes. Instead of being put into the concrete mix, the aggregate that is to be exposed is molded into the face of an elastomeric form liner. The liner with aggregate already attached is supplied by the form liner manufacturer. When concrete is cast against this liner, the protruding aggregate becomes embedded in the concrete and is transferred to its surface. As the form liner is stripped away, the aggregate is left behind on the face of the concrete where it is exposed to view. The advantages claimed for this approach include the following points: the degree of aggregate exposure is precisely determined when the form liner is manufactured; the texture and density of the exposed aggregate finish is predetermined before the concrete is cast; a dense and uniform aggregate pattern is possible because the aggregate is positioned under factory conditions by the form liner manufacturer; and the usual high-coarse aggregate factor, low-slump mix designs normally required for exposed aggregate finish can be avoided.