The Boyer Lye for Soap Making, Sodium Hydroxide Pure High Test Lye Food Grade, Caustic Soda, Drain Cleaner and Clog Remover, 2 Pack (2LB Each) - Walmart.com
Roebic Laboratories, Inc. 2 lb. Heavy Duty Crystal Drain Opener 32-oz Drain Cleaner Crystals in the Drain Cleaners department at Lowes.com
Heavy Duty Drain Opener | Instant Power Professional
Instant Power Powerful Liquid Drain Cleaner for Bathroom Use - 20x More Effective than Common Openers - Dissolves Hair and Melts Grease - Safe for Septic Tanks in the Drain Cleaners department