Related Clues:
- It's caustic
- After half a century you get quite caustic
- Highly caustic stuff
- Drain-clearing chemical
- Drain-cleaner chemical
- Burning stuff
- Drain-cleaner ingredient
- Cleaning substance
- Hominy-making solution
- Common name for sodium hydroxide
- Corrosive substance
- Chemical in drain cleaners
- Caustic drain unclogger
- Caustic stuff in Drano
- Caustic chemical used in making soap