Also with the layers of plywood the edges really need sealer to fill in the uneven holes and layers. How to Finish Pine for Outdoor Use. OSB is said to be more water resistant than plywood by some and not so by others. You may find the materials for sealing plywood at any hardware or home improvement store. By skidave in forum Painting Replies: 5 Last Post: 7th Oct 2012, 07:14 PM. Waterproofing Exterior Brick. First method, you want to seal the wood. Treating Plywood and sealing edges. There's two different ways to bring up the topic. Buying A Sealer For Outdoor Use. Combo Member. Insert the tube of caulk into the caulking gun with the tube nozzle pointing away from the trigger. Once it is sealed, you may finish your project with paint or polyurethane. Make sure your paint is outdoor as well. I use a water based outdoor polyurethane sealer. It is basically a deck, but it will have 3/4 plywood for the floor. I've got it all cut to size, but am wondering how to treat it to make it last longer, particularly with respect to the edges. A quart size goes a long way so it's cheaper than spray also. You need an extra strong finish and no leak at all for the wood to keep its initial moisture level. Cheap 14mm thick Plywood / Plywood Pallets. Allow the exterior plywood surface to dry completely. However, more waterproofing is always a good idea for materials that you're planning to use on outdoor projects. Use the caulking gun to apply caulk to all cracks and seams in the exterior plywood. The best universal way to treat plywood for outdoor use is with spar urethane, which will make the wood protected from water, sunlight, and temperature changes. Use a knife or a razor blade to cut the tip from the tube of caulk. What to use to seal exterior Plywood ceiling. Surface sand, prime and then use a decent exterior wood paint. I use outdoor … If you want your outdoor plywood furniture to last, you should use marine grade ply. They will have to tolerate all sorts of weather, and that warrants a change in the way you choose your sealer product. Plywood, while a relatively inexpensive product to use, can be particularly tricky when it comes to … After following these steps, you will never risk moisture ruining your work down the road. The last one built was before my time and used 5/8 plywood and was still in decent shape until the wind picked it up … If you have pine woodwork or outdoor furniture, applying a finish can protect it from sun or weather damage. By Ben + in forum Buy, Sell n Swap Replies: 1 Last Post: 28th Aug 2011, 10:03 PM. I am needing to seal it up as best we can such that it will last a long time. Don't PVA it, but do make sure you seal the edges very well as this will be key to maximising its performance. As you might guess from the title, this article is focused on sealers that are intended for outdoor use. Discussion in 'Carpenters' Talk' started by Combo, Jun 17, 2008. Plywood can be treated in a number of ways for outdoor use, but it really depends on the intended use of the plywood. So many home DIY projects involve the use of this type of wood, and in order to give it a finished look, most turn to stain. Obviously, these have to be a little bit tougher than the others. Plywood is one of the most versatile and cost-effective building materials, and as a result, it is also one of the most popular. The Best Ways to Paint and Seal Plywood. Plywood is a durable material for projects, but it is necessary to seal plywood to protect it against water damage and rotting, and to ensure a long-lasting finish. Wozy68 It worth the extra bucks. I'm restoring an old horse drawn cart, using 18 mm exterior ply. Size goes a long time the materials for sealing plywood at any hardware home! 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