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Whether you are cleaning your new cast iron kitchen sink for the first time or refurbishing a vintage clawfoot tub, cast iron maintenance is quite simple if followed precisely.
Cast iron bathtubs and sinks are coated with a hard, glass-like porcelain enamel that is fused to the cast iron under high temperatures. This technique makes them extremely durable and resistant to scratches, but preventative care is key.
The most common issues owners face with cast iron fixtures are rust and surface nicks. As rust can spread and surface nicks can lead to rust, it’s important to avoid these from occurring altogether to keep your cast iron tub or sink looking like new. The best way to prevent cast iron rust is with a standard weekly cleaning, and for cast iron restoration and rust removal, a deeper clean.
Mix 1 gallon of hot water with 2 tablespoons of your favorite gentle dish soap. Choosing a soap that contains a grease-cutting formula works great for removing soap scum. A soft washcloth or sponge can be used for scrubbing, followed by a thorough rinse with clean water.
When restoring cast iron, mix 1 gallon of hot water with ¼ cup of baking soda and ¼ cup of ammonia. Ammonia is great for getting rid of heavier deposits of grease and soap scum. Use a non-abrasive sponge for scrubbing. Rough sponges or steel wool should be avoided, as they will scratch the surface. Rinse well with clean water, and dry thoroughly with a soft cloth after cleaning.
Cast Iron Repair
While the porcelain enamel over the cast iron is very resilient, it is possible to chip the coating as the result of a hard impact. To repair chipped or cracked cast iron, it is recommended that you consult a professional, as special materials are required and a professional will typically warrant their work for 1-3 years.
A gentle cleanser used in your standard weekly cleaning will provide ample polish for keeping your cast iron fixtures looking shiny and new.
Soft Scrub is a gentle yet highly effective cleanser, making an excellent choice for cleaning a cast iron sink or tub.
Thanks to the durability of cast iron, fixtures of this material are quite resistant to scratches. Rust stains may occur, however, if your cast iron fixture is not properly maintained.
Reglazing a cast iron tub is a viable option for old, damaged tubs that are past the point of needing a deep clean.
If your cast iron tub or sink has cracked, this type of specialized repair should be completed by a professional.