Re: Starcraft 221
The more you purchase, i.e gallon versus quart, the cheaper. I used a gallon on 2 hulls that were both around 19', and the first hull I used in and out, so figure a gallon can handle about 50" of application. Buying 2 quarts is more expensive than getting a gallon and having some left, but it needs usage based on the shelf life of about a season or two, so, you probably need between 1-2 quarts.