Solid surface is a non-porous low-maintenance countertop surface. It can mimic the appearance of stone, wood and other naturally occurring materials, and can be joined invisibly by a trained craftsman. Typically manufactured in sheet form for fabrication into finished countertops, solid surface can also be cast into a variety of shapes, including sinks, shower pans and bathtubs. In a residential setting, solid surface can be used as kitchen countertops, bathroom vanity tops, and shower and tub surrounds. Countertop fabricators typically join solid surface sheets into desired shapes using a two-part adhesive, after which the cured joint is machined flat. The same method is used to create extra thick edges, which can be machined using tools and techniques similar to those used to work hardwoods.