An acrylic bathtub is formed through the application of heat when acrylic sheets are pressed on dies that give them the required shape. Acrylic is soft and malleable and comes in a wide variety of colors. Shapes can be also modified.
These bathtubs have a smooth, non-porous surface. Acrylic remains warm to the touch and retains heat so that any hot water remains warm for a long time, unlike other materials used in the making of bathtubs. Acrylic, however, is quite soft and can get easily scratched. it is possible to polish these scratches out or have then refilled with acrylic. These sorts of repairs are not possible in bathtubs made of other materials.
The rigidity of acrylic, which is soft, can be improved in the bathtubs made from them, by adding fiberglass during their manufacture. This does result in their becoming more expensive.