The Brady's square thermal transfer printer label roll. These items come in a variety of shapes and sizes to accommodate many situations. One of the important components to selecting the right product is the proper label and adhesive material. This thermal transfer printer label roll uses polyester for the label material and permanent acrylic as the adhesive. - Brady MetaLabel™ square thermal transfer printable label this die-cut thermal transfer printer label roll uses polyester for the label material and permanent acrylic as the adhesive.