Commonly used bathtub materials
Most baths are made from sheets of acrylic that have been heated and molded into a specific form. They can then be reinforced with additional materials, such as fiberglass, metal, or wood.
Acrylic baths have good heat retention with insulation and are easy to maintain. The strong and lightweight construction stands up to high temperatures and ultraviolet light, and is highly resistant to chemicals and mildew. Acrylic baths are also the most popular choice because they are the least expensive option.
Whilst acrylic is the most recommended material for baths, cast iron, copper, porcelain and enameled steel are also excellent options for their durability, although they are more expensive.