Waterproofing Plywood: 3 Ways to Protect Plywood Plywood is an excellent material that is used in different types of construction. That means if your plywood has 7 layers of wood, you should add 7 layers of sealant. Put it on the ply with a notched trowel ( $ 0.50c Bunnings) lay the carpet down, pull the carpet off so the glue forms string, wait a few seconds for the glue to become tacky, then put the carpet back down - smooth it out and wrap the edges securing with a staple gun. I have pimped out 4-5 boats using fibreglass to seal the ply. Bunnings sell it in a large tin pretty cheap. It normally comes in piles of 3, 5, 7, 9, and the lowest number indicates the uppermost class of a CDX plywood. The one I am currently doing I am using Bondall Bondgrete from (would you believe ) Bunnings, cost about 35 for 4 litres and I have found 1 ltr will do a 14' tinnie floor, so would do cast decks OK. Marine plywood is thicker than typical plywood, so you’ll need to apply more coats to maximize its lifespan. Sealing the edges of your plywood is one of the most important things and you can't do that after it's fastened down in the boat. What is more, they do not form yellowish seal for above waterline applications. Find IBuilt 25 x 1200 x 2400mm CD H3.2 Structural Plywood at Bunnings Warehouse. Find Selleys Marine Sealant 75g at Bunnings Warehouse. These products are generally designed to be water-proof and capable of repelling the growth of mold and mildew. As a Plywood specialist, not only will you receive expert advice but you'll find the biggest range of Marine Plywood in the country. Before heading down to purchase Bunnings Marine Plywood for your project, discover why Plyco is the best place to purchase Marine Plywood in Australia. CDX is the most commonly used plywood. What is a marine sealant? A good rule of thumb is to add as many coats of sealant as there are in the plywood. A 2 pack penetrating solution to waterproof, seal and densify timbers, chipboard and plywood.Kills dry rot and stabilises soft rot affected wood.Protects against fungi.Can be varnished but is … From building homes to creating decks to crafting particular items, plywood is relatively inexpensive, durable, and comes in different types that are flexible for your needs. Visit your local store for the widest range of paint & decorating products. Serving boat owners since 1962. They commonly adhere solidly to painted or bare metals, plastics, glass, abraded rubbers, fiberglass, and non-oily woods. With sixteen big supermarkets and mail order departments Australia wide Whitworths Marine & Leisure offers the best service, convenient locations, a huge selection of quality products, and unbeatable prices. Pull the staples out when dry. You need to at least seal the top side of your plywood and the edges, you can seal the bottom side of the plywood if you want or think it'll get wet. Sam buy structual ply mate it uses the same adhesive but has nots on the out side as the veneer it self is a far lower grade seal it with evadure or polyester resin and flowcoat if you want it to last even longer a light chopstrand mat like 1 layer oif 300 csm would do and flowcoat over the top i am happy to do the glass and flowcoat mate you just pay for materials and cut to shape. The very name of Marine Plywood immediately gets you thinking about how perfect the product will be for use in water our outdoors in general, and the promise of it being an exterior plywood plays up that idea too. However, what many people don’t realise at first is that Marine Plywood shouldn’t just be bought off the shelf and then immediately submerged in the ocean! Visit your local store for the widest range of building & hardware products. 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