You cannot use just any type of foam to replace it. Tim returned the deposit to the buyer, who left angry. For tougher stains, he uses On & Off Hull & Bottom Cleaner. And he was stuck with $95,000 worth of unsaleable boat. It is two liquids which when mixed together create an expanding foam, ideal for irregular contoured cavities. I would not start cutting into the hull because the foam surrounding a drain tube was damp. Wet Edge topside paint adheres to fiberglass and wood like wet on water, and expands and contracts effortlessly with your ever-shifting hull. Myth: Wet readings on stringers mean the boat hull is junk. The foam in a boat is basically a type of the same foam used as insulation, in the boat used as floatation. Today I am working on removing all of the old closed cell foam that was on the inside of the hull. Some types will absorb water like a sponge, rendering it useless as floatation and adding mucho weight to your boat. ... on solid laminates. The ultimate horror story for boats: Outer skin of hull is removed to display water-soaked balsa core. It is porous and absorbs water, you will need to let it air dry for some time. Choose from 21 UV-stable colors or create your own Usually, this means starting with a female mold. The mold is first sprayed with gelcoat, then fiberglass cloth is applied, and then resin is used to saturate or “wet out” the fiberglass. Most of the time, boat manufacturers use a two part foam. If you are not concerned with structural aspects the type of foam used for pool noodles is the best. If that were the case, then most every boat with wood stringers would be junked. The manufacturers of balsa and balsa cored hulls tell us that wet balsa in a hull does not compromise its structural integrity. If you are concerned that there is water retained in the foam between the inner and outer hull, the next time you have the boat on the trailer for an extended lay-up, drill a 0.25-inch hole into the hull in the region where you suspect there is entrapped water. On the other hand, water cannot be detected through a dry core of balsa or foam, no matter what its thickness is. With fiberglass boat building, however, the major components of the boat – the hull, deck, liner, and large parts like consoles—are molded from fiberglass. It failed. the rotted floor allowed the water through and by the looks of it sat … also make sure that the drain channels in the hull are clear and prop the boat up so that the excess water can drain out. Take care to prevent rot and the boat … The fact is, most have moisture levels which are higher than when the stringers were installed. Once the boat is dry, he removes any deck hardware that isn’t through-bolted—including cover snaps—and tapes off the windshield edges. He starts a project by washing down the boat with a dish detergent like Dawn to remove any oil and scum. A spray bottle with water will keep the hull wet as work your way around the hull. They claim that moisture spreads very slowly if at all horizontally due to the end grain cut of the balsa core. The surveyor discovered wet hull core with a moisture meter, and subsequently pulled hull fittings and portholes to physically reveal the wet balsa core. Fear of Wet Sanding The two part foam will absorb water and act as a structure in the hull, but even though it is wet it will still float. Other one-part topside paints can lift, peel, or crack under this type of pressure. Stringers were installed water like a sponge, rendering it useless as.... When the stringers were installed of wet Sanding a spray bottle with will! 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