BAROLKLEEN - Contains Sodium Sesquicarbonate, Soda Ash and Lye. To use - Mix 1 LB per 5 Gallons of hot water. Soak in barrel for 3 days. Drain and flush 3 times with water. Rinse with a solution of 2 oz. Sodium Sulphite, 1 oz. Citric Acid and 2 Gallons Water. Final Rinse - Water ONLY.