Cement Applicators Choose from an array of Weld-On daubers, brushes, swabs, and rollers that best fit your application needs. Cement Applicators SuperDauber™ SuperSwab® 3020: Roll-A-Weld 3" roller 6020: Roll-A-Weld 4" roller 7020: Jumbo Roll-A-Weld 7" roller 4020: 4" swab 5020: 4" swab 8020: 4" cotton swab Cap Dauber PB-1 Plastic Handle Brush CM BCP Can-Mate® Brush