Crystal Drain Opener, Cleaner Type Drain, Pipe, Container Type Bottle, Container Size 20 oz, Cleaner Form Crystalline Solid, Septic System Safe Yes, Garbage Disposal Safe No, Fragrance Unscented, Product Label Drain Opener, Product Series Glug(R), Ready to Use/Concentrated Ready to Use, Color White, Primary Chemical Sodium Hydroxide, Properties Septic System Safe, Recommended Dilution Ready to Use This product contains a chemical that is regulated under California Proposition 65. Warning: This product contains a chemical known to the State of California to cause cancer. Warning: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm. -