However, it cannot pass through a . If water sits on top of the clog, the caustic solution will react at the interface, creating a crust of semi-reacted material that hardens and seals the blockage tighter.
Caustic soda clears about 70% of residential sink clogs. For shower drains with long hair accumulation, it often fails because hair mats together, leaving a core that the liquid never reaches. how to unblock drains with caustic soda
A 15-foot drain auger ($25–40) is safer, more reliable for hair clogs, and works on 90% of residential blockages without chemicals. For grease clogs, boiling water followed by dish soap (enzymatic) is safer and often just as effective. However, it cannot pass through a
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