Sheet vinyl flooring covers a large area of floor with minimal seams, but over time the adhesive can lose its bond, and the seams may rise as a result. Raised seams not only ruin the look of your floor, they present tripping hazards. By putting off the repair, it can lead to further damage to the floor. Most homeowners can repair a raised vinyl flooring seam in just a few steps.
Apply heat to the flooring around the raised seams using a hair dryer. The heat from the hair dryer softens the vinyl, which prevents it from cracking as you repair the seam.
Lift the raised section of vinyl flooring up from the floor, and then scrape as much old adhesive from the subfloor as possible with a putty knife. If both sides of the seam have lifted, do the same on the other side.
Remove large chunks of adhesive as you scrape, and then vacuum debris, dirt and dust from the subfloor beneath the vinyl flooring.
Apply painters tape along the edge of the flooring on each side of the seam to protect the surface. The tape should only go along the edge of the upper surface of the flooring, and should not wrap around to the bottom side.
Apply an even layer of vinyl flooring adhesive -- available at flooring, home improvement and hardware stores -- to the subfloor beneath the raised seam with a putty knife.
Press the flooring down onto the adhesive. Apply a rag to press down the edges and remove excess adhesive. Repeat application of adhesive on the opposite side of the seam.
Cover the repaired seam with a sheet of wax paper, and then place a sheet of plywood or cardboard over this. Set a heavy object, such as a stack of large books, on top of the plywood to hold the seams down.
Let the adhesive dry for at least 12 hours, and then remove the plywood and your heavy object.
Pull the wax paper away from the vinyl flooring carefully. Remove the painters tape and apply vinyl seam sealer, which typically comes with an applicator, to seal the seam.
Allow the seam sealer to dry for at least 8 hours before walking on the repaired area of flooring.