Slide a plastic paint scraper across the tile to remove stuck food and other debris. Sweep the floor to remove dirt and loosened debris from the surface of the tile. Thoroughly mop the area with soapy water. Rinse the mop in clean water. Mop the floor with clean water to remove soapy residue.
Allow the floor to dry for four to six hours.
Open all window and doors in the area. Fill a plastic bucket half-full with a non-toxic VCT sealer.
Dip a clean, dry mop in the plastic bucket. Ring excess sealant from the mop head. Run the mop over the tile using a long sweeping motion. Reload the mop by dipping it in the bucket after applying sealant to 15 to 20 square feet of flooring. Continue the process until the entire floor has an even coat of sealant.
Allow the sealant to dry for 30 minutes before applying a second coat to the VCT.