Aqua Plumb 5170515 Household Strength Crystal Drain Opener That's Fast Acting, specially designed not to harm the pipes.

Product contains Sodium Hydroxide.

Precautions: Wear protective gloves, clothing, eye and face protection. Do not get in eyes, on skin, or on clothing. Don not eat, drink, or smoke when using this product. Use only in well-ventilated areas and do not breathe dust, fumes, or vapors. Wash hands and all affected areas thoroughly after handling.