Skeewbackers are super lightweight, waterproof mosaic backers. they are rigid and at the same time shapeable. use them indoors and outdoors in wet or dry environments. they are made from Wedi board - a polystyrene foam sandwiched between two thin layers of reinforced concrete and come in 1/4" or 1/5" thickness.
Wedi Board Wedi board (pronounced weedy) is an ideal substrate for mosaic artists. It consists of styrofoam encased in mesh and cement. This sturdy material is very lightweight and cuts easily with a utility knife (no need for any power tools!). Wedi Panels are about ¼ of the weight of Durock and other cement boards, and ½ the weight of MDF or birch plywood.
The ideal lightweight, all weather mosaic substrate. Wedi board has an engineered foam center and a thin layer of cement and fiberglass mesh on each side. Great for interior and exterior projects. Wedi board can easily be cut with a utility blade or cut into shapes with wood power tools.