Grocery, hardware; Known also as caustic soda and lye, sodium hydroxide is used in many commercial drain. sodium hydroxide. NaOH. Lye, Caustic Soda. cleaners/openers. Ex: Rooto Drain Opener (100% Pure), Drano (not 100% pure), Roebic Crystal Drain Opener NB: Keep out of eyes. sodium hypochlorite sodium nitrate. NaClO. Bleach. NaNO3. Chile saltpeter 100% Lye crystal drain cleaner; For use in sinks, tubs & small drains; Gets the clog out! Read label and follow safety directions; D.O.T. REGULATED: Ships via GROUND transport only [ No Overnight, 2nd Day or 3rd Day Select delivery options, sorry. ] Also no shipping via USPS or to USPS Buildings or PO Boxes.
Make sure you buy food grade lye. We also buy some lye at a semi-local store (in Kingsville about 25 miles) for a decent price. The brand we get their is Rooto (in 1 lb. containers) which is for drain opening. If you don't buy food grade, then make sure the container says 100% lye. We have also seen Rooto brand at Ace Hardware stores.