How to Repair a Raised Seam on Sheet Vinyl Flooring

Remove any dirt from the vinyl flooring using a vacuum cleaner. Lift one side of the seam and vacuum the dirt from under the split section of vinyl floor.

Place blue masking tape on both pieces of vinyl flooring. Ensure the tape does not extend beyond the ends of the flooring and enter the seam.

Slide 1 inch of a metal putty knife blade into the seam of a closed door. Push the handle of the putty knife until the blade bends on a 45-degree angle. Load the bent end of the blade with vinyl floor adhesive.

Lift both sides of the seam. Apply vinyl floor adhesive to the subfloor under the seam and the bottom of both lifted sections of flooring. Press both vinyl pieces to the subfloor. Cover the seam with a wood board, and place two 5-gallon buckets of dirt -- or water -- on the board. Allow the weight to remain on the seam for two to three hours. Remove the weight and board before continuing.

Set one side of a straightedge 1/8-inch off to one side of the flattened vinyl seam. Pull a bottle of vinyl seam sealer along the edge of the vinyl seam. Allow the seam sealer to dry for 24 hours before using the repaired area.