Drain Blaster A sodium hydroxide based drain unblocker for dissolving blockages and eradicating bad odours.
Instant Power Crystal Lye Drain Opener, 16 oz - Walmart.com
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
Belle Chemical Sodium Hydroxide - Pure - Food Grade (Caustic Soda, Lye) (1 pound) - 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