Casainc fireclay sinks is kiln-fired at high temperatures of 2200°F and features solid core construction that makes it highly resistant to impact and thermal shock. At the same time, using advanced glazing technology to create a durable non-porous finish, against scratches, rust, stains and will not yellow or fade over time. These properties make Casainc fireclay sinks a superior choice compared to alternative materials such as cast-iron enamel and ceramic sinks which can easily chip or crack.