NECKKONIX Caustic Soda Flakes for Drain Chimney Cleaner to Clear Clogged Sinks & Pipes Soap Making (400 Grams Smart Container Pack) : Amazon.in: Health & Personal Care
Instant Power Crystal Lye Drain Opener, 16 oz - Walmart.com
Green Gobbler 1 Gal. Drain and Toilet Clog Dissolver G8032D - The Home Depot