Surely Debrowning Agent A mild acid product that removes browning and most tannin stains, neutralizes alkali residues and serves as an overall acid spotter. For stain resist carpet that has browned apply Surely diluted 1:1 parts water at a rate of 200 sq. ft. per gallon. To restore fiber that has browned, mix one part Surely to 4 parts water and apply. To prevent browning add 3 to 4 oz. of Surely to your cleaning solution. To stabilize dyes use 1 oz. of Surely to one gallon of water and apply liberally. A clear, colorless liquid with no odor. pH – less than 3.