Give your concrete a classic, elegant look. Acid Stains react with the minerals in your concrete to physically change the color of your concrete. They create a colored translucent, variegated and sometimes marbleized effect. The art of RAC Stain is that no two slabs will ever color exactly the same; the texture of concrete, age and dilution ratio affect final color appearance. The translucence of RAC Stain also allows the many unique characteristics of the slab to show through. Acid staining your concrete will transform it into a work of art.