Examples of laminate materials include melamine adhesive countertop surfacing and plywood. Some manufacturers use fiberglass as a laminate between wood layers. It is generally made of either a plywood laminate or aluminum with a rubber laminate. Melamine formaldehyde is used in plastic laminate and overlay materials. The body is made from a high-temperature epoxy fiberglass laminate. Thin walled beams are particularly useful when the material is a composite laminate. These bars are made of fiberglass covered in wood laminate, to prevent them from breaking. Spot UV varnish onto matte laminate can also have a similar effect. Beta marquisette laminate, and Teflon coated Beta filament cloth. Adhesives are used as the bonding medium for creating a laminate. A variety of materials including laminate composites and concrete can fail by delamination. Pioneer work on composite laminate thin walled beams was done by Librescu. Recent technological advances have been made, which allow the construction of ultra-thin porcelain laminate veneers. A metal foil is most commonly used as the conductive element of a flexible laminate. The base material is the flexible polymer film which provides the foundation for the laminate.