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13 Using Chemical Vulcanizing Fluid (cement), brush a thin, even coat into the clean textured area. Allow 3 to 5 minutes to dry; the vulcanizing cement should be tacky. Areas with high humidity may require a longer dry time. Make sure the cement used is compatible with the repair units you are installing. 14 With the tire beads in a relaxed position, center the repair unit over the filled injury. Press the repair unit down into place over the injury. Make sure the directional bead arrows on the repair unit are aligned with the beads of the tire, and press into place. Roll the protective poly back to the outer edges of the repair unit. This enables you to handle the repair unit without contaminating the bonding gum layer. You are now ready to stitch the repair. 15 Stitch the repair unit, firmly pressing down from the center toward the outer edges. This will eliminate trapping air under the repair unit. 16 Remove the rest of the poly backing. Stitch the repair unit from the center to the outer edges. Remove the top clear protective poly. 17 To cover over-buffed areas in tubeless tires, apply Security Sealer to the outer edge of the repair unit and over-buffed area. If tube-type, cover the repair with Tire Talc to prevent the repair from vulcanizing to the tube. 18 Cut the stem off on the outside of the tire 1⁄8 inch (3 mm) above the tire’s surface. The tire is now ready to be returned to service. Section Six: Repairs and Retread 87