How can I tell what material My bathtub is? If your tub has no give at all, then it’s steel or cast iron. Hold a magnet up to the tub; does it attract? If it’s magnetic, then it’s an enameled surface, but if it’s not magnetic, it’s porcelain.
How do I know if my bathtub is fiberglass? What is this? Looking closely at the edges of your tub, thin edges could mean fiberglass, while thicker edges could indicate acrylic. Another tip to rule out cast iron as a material, hold a magnet to the side and see if it sticks. If it does not stick, you most likely have either fiberglass or acrylic.
Do all acrylic tubs have fiberglass? Acrylic Bathtubs
Acrylic tubs are colored sheets of clear plastic reinforced with layers of fiberglass. Acrylic tubs are slightly more expensive than a fiberglass tub due to the manufacturing process. They’re also lightweight, very durable, and require less maintenance, unlike other materials.
Is my tub surround fiberglass or plastic? The first test to tell if you have a fiberglass shower is to press on the material. Acrylic and fiberglass tubs and showers both have a little give to them, so when you press on them, you might be able to feel the slight flexibility.