RCD Corporation® Mastic Brushes are manufactured with natural bristles and wooden handles which make them ideal for applying RCD Mastics, Adhesives, Coatings, and Sealants to all types of substrates. They are reusable and can be cleaned repeatedly, but since they are low in cost they can also be disposed of when the job is finished. RCD Corporation® Mastic Brushes are also ideal for cleaning coils and for dusting off parts, equipment and ductwork. Compatible with solvent-type parts cleaners. Available in 2 inch, 2.5 inch and 3 inch widths.