When choosing a material for bathtubs and bathroom walls, it is important that it has as low porosity as possible. This means that it should absorb as little moisture as possible or none at all. It is also important that moisture from the walls does not seep through the joints into the microscopic cracks between the bathtub components. Acrylic stone is particularly suitable for fabricating bathtubs. A custom-made acrylic stone bathtub is expensive, but well-known manufacturers of acrylic stone sell prefabricated bathtubs in a wide range of sizes and shapes. A standard factory-made acrylic stone bathtub will be cheaper than a custom-made one, so it's worth checking the catalogues of acrylic stone companies.
Acrylic stone can be used to create a bathtub of any shape and size. It can be joined to the walls without gaps or visible marks, and the joints can be rounded. The acrylic bathtub can also be freestanding. Often just the sides or rim of the bathtub is finished with acrylic stone. Acrylic stone can be combined with other materials such as engineered quartz, sintered stone or porcelain. These materials are also used for bathtubs. The only disadvantage is that the joining inside edges cannot be rounded off and seams hidden. While acrylic stone bathtub looks seamless and one-piece, bathtubs made of other types of artificial stone show separate interlocking planes.
The absorbency of artificial stone is almost zero, which makes it resistant to mold and easy to clean. Natural stone bathtubs look impressive, but they are not very practical in everyday use. To maintain the flawless appearance of natural stone, it needs to be impregnated and not allowed to stay damp. Otherwise, natural stone becomes stained, and mold may appear. All natural stones are porous, so water can penetrate them easily and linger in the pores. Despite these drawbacks, it is possible to make a seamless bathtub out of a natural stone block. It will look fabulous, almost like a sculpture. Any natural or artificial stone is suitable for bathroom walls, but artificial stone is preferable in areas that come into contact with water. Natural stone is better used in dry areas.