Drain Blaster A sodium hydroxide based drain unblocker for dissolving blockages and eradicating bad odours.
Sodium Hydroxide CAUSTIC SODA 99% – for soap making, buy from UK supplier – HD Chemicals LTD
Instant Power 1650 Crystal Lye Drain Opener – 1 Lb, Quick Action Sodium Hydroxide for Sinks and Drainage Systems | Plumbing Solutions : Amazon.ca: Health & Personal Care
Crystal Lye Drain Opener - Instant Power
Belle Chemical Recalls Drain Cleaner Product Due to Violation of FHSA Labeling Requirement | CPSC.gov
Crystal Lye Drain Cleaner | Instant Power Professional