Sweep the area covered by the VCT tiles with a dust mop.
Apply a VCT stripper solution to the floor. Allow 15 minutes for the cleaning solution to act on any tough stains on the VCT.
Scrub the floor vigorously using a scrubber and a stripping pad. Rinse the stripped floor with a mop and clean water in a bucket. Allow the floor to dry.
Apply the first coat of a VCT sealer, such as Atomic Top Coat, with an acetone-resistant pump sprayer. Make sure the coat is 1/8-inch thick, or cover 500 square feet of floor with 1 gallon of the top coat. Allow 45 minutes for the coat to dry before applying the second coat in a similar manner. Let the two coats dry for two hours before walking on the floor.