AGRA Stamped Concrete, based in Chester County, makes its Stamped Concrete by using a liquid, iron oxide integral color. This is an important difference! Most concrete contractors use less expensive 'shake on' powder colors. Shake on colors can be uneven, can chip (exposing plain concrete) and can cause inconsistency in shading from section to section. AGRA Concrete Specialists delivers concrete pre-mixed and colored. Should your job require more then 10 yards of concrete, our mix proportions are exact and each truck will pour the same color, no matter how big the job. With over 70 colors available and so many stamped concrete patterns we can make your dream project come true.