b'Osmosis Prevention and Cure$ All Prices in 481Canadian Dollars $Osmosisa scary word to boaters.Osmosis is much the same as a car rusting out.We all know that undercoating our new cars extends the life of the car dramatically.By definition osmosis is: for a liquid (such as water) to pass through a membrane (such as gel coat).Osmosis occurs everywhere, but is extremely bad when it occurs in the hull of a fiberglass boat.Osmosis occurs when small air pockets are in the laminate.These pockets fill with water and expand to cause blisters.In winter the water in these blisters freeze causing further damage.From year to year these blisters will get bigger and bigger.If caught early the repair can be quite painless, but if it is not seen or ignored the problem continues to spread until it some extreme cases the entire gel coat must be removed. This is not to scare you, but if you are buying a used boat, you should purchase it in the fall when it is lifted out and inspect the hull completely.Even after a few days out of the water the blisters can dry up and disappear!Many older boats do not get osmosis because of the way they were laid up and the materials they used then.The boat manufacturers blame the resin and gel coat manufacturers, the resin/gel coat manufacturers blame the boat builders. New Boat Preparation1. The first step in preparing a new boat for any type of coating is to remove the mold release wax. During construction of a fiberglass boat the mold in which it is made is coated with a wax-some of which adheres to gel coat. If the wax is not removed it will prevent any coating from adhering to the gel coat. The wax can be removed by using 202 Dewaxer Fiberglass Dewaxer. )Apply the dewaxer to the gel coat using LOTS of clean rags. Be sure to rinse all of the dewaxing agent from the gel coat.2. Wash the hull with a Fiberglass Cleaner to ensure that all surface contaminants have been removed.3. Sand the entire bottom with 80 grit sand-paper until all angular sheen has been removed from the gel coat. This will create a mechanical bond between the gel coat and epoxy. If the boat has a warranty that prohibits sanding, use 202 Dewaxer following the label directions exactly. The 202 Dewaxer will the wax from the gel coat.4. Apply Pettit ProtectPrimer by brush, roller (the best way) or spray at the recommended rate to achieve the proper film thickness and water impermeability. Calculate the square footage of the area to be coated and divide by 140 sq. ft. to determine the amount of Pettit Protect Primer per coat that will be needed. Each coat at 140 sq. ft. per gallon will yield 7 mils dry film. Plan to apply three coats to yield 21 total mils dry film thickness. Apply primer following label directions.5. Apply the Anti-fouling paint of your choice.See Instructions on Epoxy Primer for recoat time, this is extremely important.If the epoxy cures fully then no paint will stick to it!email: hmp@hollandmarine.comwebsite: www.hollandmarine.comfax:905-891-7972tel:905-891-1639 481'