Bathtubs come in all sorts of shapes and sizes and the choice is constantly growing. Traditionally bathtubs were made from cast iron, however today acrylic tubs are more popular. Acrylic bathtubs are made from vacuum molded sheets of acrylic that are reinforced with fiberglass. Acrylic is less expensive and more easily repaired than other materials used in tub manufacturing. Acrylic bathtubs are surprisingly light. Since they are so light, they make for easy placement anywhere in the bathroom. This is also good for any two-story home where you may want to place it upstairs since the floor will not need to be refortified to prevent it from breaking or causing any damage to the rest of the house. Acrylic bathtubs are non-porous, high gloss and resistant to scratches. They make idea. whirlpool tubs and can be molded into any size or shape. They conduct heat and hold heat well for a much longer bath. They also have the advantage of being able to be manufactured in a variety of colors. These synthetic tubs can be sensitive to high acidic chemicals that are found in some tub scrubbing products that contain acetates. These chemicals can crack and erode the acrylic.