Custom-fit polyurethane computer keyboard seal blocks out dust, dirt and liquid spills, eliminating downtime for costly maintenance and cleaning. Seal remains in place and resists wear for years of trouble-free use. Matte finish reduces glare yet ensures easy reading of keyboard markings. See below for seals for keyboards sold by the Patterson Technology Center. To place an order for a mail-in certificate. You’ll receive a pre-paid mailer certificate; simply fill it out, then fax or mail it back in the postage-paid envelope. You’ll then receive your custom seal directly within a week.