RectorSeal’s LiquidDrain is a commercial liquid drain cleaner that’s safer for the environment, service technician and plumbing system than acid-based liquids, the company notes. The one-quart (0.94-liter) formula is an industrial-strength, nonacid and nonflammable drain cleaner and opener formulated exclusively for the plumbing trade and available from traditional plumbing wholesale-distributors. The odorless, neutral-blue-colored penetrating sodium hydroxide high-foaming action lifts and pushes contaminants and oxides from sewer and waste lines. It clears blockages containing drain-clogging paper, rags, sanitary products, sludge, soap scum, fats, wood, hair, food and difficult-to-remove cooking grease. It will not harm plumbing piping materials.