Things You'll Need
Instructions
Wash dirt and debris off the seats and cushions. Follow your boat manufacturer's recommendations for the appropriate cleaning solutions. If the owner's manual doesn't specify, use a sponge and soapy water (1 tsp. liquid detergent per quart of water). Rinse them well with a sponge and clean water, then towel them dry.
Coat the seat cushions with a protectant that does not contain alcohol. Follow any product recommendations your boat owner's manual makes. If the owner's manual doesn't specify, you can find vinyl protectants at most automotive or big-box retailers. Follow the manufacturer's instructions for application methods and amounts.
Store the cushions in the boat on their narrowest edge, leaned against the side of the boat to allow air to circulate freely around them during storage. If your boat does not have a secure, weatherproof cover, remove the cushions from the boat and store them in a climate-controlled area indoors.