I've also added a few drops bleach/chlorine per spray-bottle. It's weak enough to not harm anything but still disinfects the lifeforms.
You also need to figure out why its molding and correct the cause - the mold will come back if you don't... - Bill
Thanks everyone for the ideas. Bill the seat were in the basement out of the car. I had covered them in plastic instead of a sheet
Jasons is right Simple Green and some soapy hot water let it dry in the sun if you can I did it and they look Great after vinyl protectant is used.
He is from Buffalo. He can forget about sun for the next nine months or so. But a nice hot day in the sun would kill the nasty stuff. Drive to Florida for a week or so with them.:bglasses:
My 65 Riv was hidden away since '78, still all original, the seats were covered with mold and garage dust and dirt, I used full strength Tilex to clean them, and Meguires vinyl shine to polish till they looked like new. :beers2: