Caustic soda has a large range of uses from unblocking drains to sanitising dustbins. It is important when using caustic soda to always wear appropriate personal protective equipment such as chemical resistant gloves, overalls, and eye/face protection against splashes. To use, dissolve in COLD water in a plastic bucket and stir gently with a wooden spoon or stick. Always add caustic soda to water, and not water to caustic soda. Ensure to rinse any equipment and treated areas thoroughly after use. Not suitable for use on galvanised zinc, aluminium or acrylic surfaces.