Related Clues:

• Unclogging aid
• Walk a line, lacking directions for chemical base
• Corrosive solution
• Caustic drain substance
• Ingredient in a drain declogger
• Drain-clearing stuff
• Drain-opening liquid
• Strong drain opener
• In chemistry, a base that dissolves in water
• Chemical compound with the formula NaOH
• Dishonest-sounding chemical
• It's used in soapmaking
• It's used in soap making
• Antacid needed by boxer after talk starts late
• Caustic soap ingredient