Caustic Soda is a useful tool for dissolving soft, organic blockages in toilets, provided the user adheres to strict safety protocols regarding ventilation and skin protection. However, due to the high risk of chemical burns and the potential to damage older plumbing systems, it should only be used when mechanical methods (plunging/snaking) have failed.
Using (sodium hydroxide) is a powerful chemical method for clearing stubborn organic blockages in toilets . However, it is a highly corrosive substance that requires extreme caution to avoid severe chemical burns or damage to your plumbing. How Caustic Soda Works on Blockages caustic soda for blocked toilet