Ensure that the fabric that will be treated is clean before beginning. Lay the fabric flat on a clean, flat outdoor surface such as a driveway or patio.
Apply an even coat of the waterproofing spray on all surfaces of the fabric. If treating an already upholstered cushion, be sure to coat all trims and seams.
Allow the fabric to dry completely before applying any additional coats of spray.
Ensure that the fabric that will be treated is clean before beginning. Follow the manufacturer's instructions on the wash-in treatment and put the treatment and fabric in your washing machine.
Remove the fabric from the machine and lay it flat to air dry.
Once the fabric is completely dry, the wash-in treatment may be repeated.