A cast iron drop-in bathtub is highly durable and requires less maintenance than bathtubs made from fiberglass or acrylic resin. These heavy-duty pieces retain heat well, making them ideal for long hot soaks.
Cast iron bathtubs are made by pouring molten liquid iron into a mold and letting it cool and harden to create a solid piece of metal. It is coated with enamel, making it resistant to scratches and most cleaning chemicals.
However, they can chip or crack if something heavy and sharp drops on them. Unfortunately, chips can expose the metal underneath, leaving the tub vulnerable to rust and corrosion.