Solid surface is a 100 percent manmade product, which means great diversity when it comes to color and texture variations. It is made of resin, an acrylic or modified polyester. Solid surface is versatile and can be cut into about any shape imaginable. Solid surface is the only material that features molded sinks seamed directly to the countertop with no gaps or caulks. Built-in coved backsplashes can be fused to the countertop to create a water-tight transition.