Direct contact with the skin or eyes can cause permanent damage or severe burns almost instantly.
Caustic soda is a "nuclear option" for unblocking toilets. It is effective but dangerous. It should only be used as a last resort for organic blockages, and on a completely blocked system where the water will not drain at all. If you are not confident in handling hazardous chemicals, a toilet auger or a professional plumber is the recommended course of action. caustic soda to unblock toilet
Caustic soda causes severe chemical burns upon contact with skin or eyes. Direct contact with the skin or eyes can