Infusion Reactive Concrete Stain is an acid-based product that provides a mottled and variegated look on either new or aged concrete. It is available in four new stain colors, including mustard seed, shore gray, midas, gold, and sienna red. Application takes four steps - cleaning the area, testing, applying the stain, and rinsing and cleaning the area. H&C Concrete Stain. 800-867-8246.