Citra Drains natural enzymes dispose of organic substances to safely eliminate drainclogging buildup in your pipes, while leaving behind a hint of delightful citrus fragrance. Made with essential oils, its safe for plumbing and perfect for most organic drain blockages, including those caused by grease, oil, soap residue, and more. Product is crueltyfree and vegan. Contains NO harsh chemicals. Directions: Pour 1/3 bottle slowly down drain. Wait 6 to 8 hours before running water down the drain. (Note: This might cause loosened buildup to slow or block drain water flow. This means Citra Drain is doing its job to eat away buildup on pipe walls. Plunge and repeat aboverecommended treatment.) Caution: Keep product away from your eyes. If exposed, flush thoroughly with water for at least 15 minutes. If irritation persists, call a physician. Keep product out of reach of children.