Purchasing foam for a boat can be somewhat challenging due to the enormous amounts of products that are available on the market today. First of all, you need to purchase foam that is both water- and mildew-resistant. Otherwise, you’ll most likely end up with replacing them in the near future, therefore wasting your initial investment. One answer to this is what’s called closed cell foam – like polyurethane, which doesn’t allow water to get inside of the interior of the foam. This is an economical solution for your outdoor boat