Once more remove any residue using the tacky cloth. If sealing a large piece of flat exterior plywood, use a paint roller to apply the sealer to the flat areas and a paintbrush to apply it to the edges. The plywood is getting damp and staying that way, and that’s what’s causing the finish to peel and the plywood edges to split. Testing a couple things to use for a floor covering in my boat. abnormal porosity will be the first to fail in exterior use, as they will readily wick up water and encourage the formation of fungal growth However, what many people don’t realise at first is that Marine Plywood … Can epoxy floor paint be used on plywood? I've used it extensively to seal … We can significantly enhance the resistance of plywood to the ingress of water with Smiths CPES. Nick Davis is a freelance writer specializing in technical, travel and entertainment articles. Dry the brush with a clean, soft cloth or rag. Apply a generous amount, 4 to 5 tbsp at a time, of water-repellent sealer to the plywood's edges and overall surface using a paintbrush. My wood shim barn door was backed with plywood, so I used edge banding on the sides and stained it to match the rest of the door. Make sure you’re using an exterior-grade plywood (B-C grade should work, or marine-grade) to start with, which will be made with water-resistant glue. The tapes under my consideration at the moment are: 1. To properly seal plywood, penetrating oil can be used. Place a dust sheet or plastic sheeting on the ground below the exterior plywood you want to seal. Smiths CPES does not attack the phenolic surface of such boards, and offers high quality weather protection to the not protected surfaces of them. 48 hours was allowed for drying, and then the sheets were placed in a shallow tray with dyed CPES like the samples in the photograph above. These sheets were first saturated with Smiths CPES – which is naturally clear. The CPES was allowed to cure and then the sections were cut open and sanded to show these internal sections. Plywood is tough but it still needs to be sealed, especially on the edges, to prevent moisture penetration when used outdoors. Brownish colour. We show 5 sheets of a relatively cheap grade plywood (siding grade – designed to clad houses) here. We stood the plywood in Smiths Clear Penetrating Epoxy Sealer dyed blue. These use different glues to hold the veneers together. plywood, and clearly demonstrate areas of abnormal porosity (areas that These offer varying degrees of water resistance, but waterproofing plywood edges, and to a lesser extent the board faces themselves, will significantly extend the life of plywood in any environment where water is present. Buy some Bondo®-type auto body filler or wood filler and spread a thin coat on the plywood edges, then sand it smooth. Wear latex gloves to keep the sealant off of your hands. How To Glue And Repair Wood With Epoxy Wood Glue, Metal Glue Tips: Preparing Metals For Gluing Or Painting, Plastic Glue Tips: Preparing Plastics For Gluing, Render Crack Repair: How To Repair Cracks In Rendered (or Stucco) Walls Permanently, Precast Concrete Panel Repair – Repair broken cast concrete. We stood the plywood in Smiths Clear Penetrating Epoxy Sealer dyed blue. Still, plywood can be a bit tricky to seal up properly. Learn how to prepare plywood edges for painting so they'll look great--without rough edges, voids, and other imperfections. Let the plywood dry for at least … House Painting Info: Professional exterior painting tips. Plywood is a flexible wood material used in the construction of houses, sheds and other buildings. While you can paint any plywood, the answer to the second question above is NO – I did not use expensive veneer plywood. Before applying the edge banding, give the edge … You can use an acrylic paint sealer or drywall sealer, or you can use glue or oil based primers which will help prevent the edges from swelling. 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. Dip a foam brush into the clear, penetrating epoxy. Fiberboard is an insulating structural sheathing made up … So, seal the edges … The CPES also makes the final varnish or paint finish last much longer. , which is designed for exterior use to sheathe the outside of a house. The solution? Repair rotten wood – make varnish last. Caulk or otherwise seal it to the floor, then attach your plywood sheathing to the wall so it covers the vertical part of the flashing but does not extend all the way to the floor. Plywood is available in a variety of different qualities. Make sure to seal these, especially if they have routed details. Sand Plywood and Apply Edge Banding. Place a dust sheet or plastic sheeting on the ground … Step 2. (rot). Plywood is an important and stable building material, comprised of many different veneers glued together at right angles. Waterproofing Plywood. Type of plywood for painting. Aquarium sealant is a silicon sealer that is regularly used on marine ships, aquariums, vivariums, and outdoor plumbing. Sealing the edges of these boards can significantly extend their useful life. The bottom edge of the plywood … Performance is impressive under exposure to the most extreme elements. He holds a bachelor's degree in journalism from the University of Memphis and an associate degree in computer information systems from the State Technical Institute at Memphis. Plywood is a flexible wood material used in the construction of houses, sheds and other buildings. This technique for waterproofing plywood edges is especially valuable for treating exposed cut edges of commercially finished phenolic faced plywood boards, such as Buffalo Board™. Plywood is available in a variety of different qualities. Many different grades of plywood exist. In fact, I used the cheapest one – sanded plywood… Use a small stain brush to apply the varnish to the plywood. Click here to view the results. It is better to sand in back and forth... To get a smoother finishing touch, sanding is repeated with 120-grit sandpaper. Glue Oily Wood like Oak, Teak, Maple, Cocobolo and many others. Apply it to the wood, starting with the top and side edges and moving to the front face. Copyright 2020 Leaf Group Ltd. / Leaf Group Media, All Rights Reserved. To keep exterior plywood from rotting, it is important to seal the wood with a water-repellent sealer that also prevents the wood from peeling. Sealing MDF before painting is important to fix the cut edges and surface. What Is Wood Rot, Why Does it Happen And How Do I Stop It? Step 3. The dyed regions are far smaller than before. … This allows it to slide up and … The edges of MDF boards absorb paint heavily. The layers are pressed into place and secured using a special type of woodworking glue. The results are astonishing, and demonstrate how well CPES acts as a waterproofing preservative on plywood. Sealing Plywood for longer life. Structural Fiberboard Exterior Sheathing. Soaks up very quickly leaving a water resistant surface to apply furthur decorative coatings. This plywood is formulated to resist water and moisture on its own. Apply four full-strength coats minimum, but six or seven would be better. Sandpaper … The goal is not to sand the filler away but to even it out and fill … Allow the epoxy to dry completely before flipping it over and applying it to … Using the paint … I've used it on MDF to seal the material from damp. This photograph shows another 5 sheets of siding plywood. Use the stain brush to apply several coats of the exterior polyurethane varnish to the edges of your plywood to seal... Then, use a garden sprayer to coat the … Wash the paintbrush by pouring paint thinner over the bristles and then running the brush under warm running water to remove any residue. Start by sanding the surface lightly, just enough to rough up the existing sealer … To keep exterior plywood from rotting, it is important to seal the wood with a water-repellent sealer that also prevents the wood from peeling. The difference between marine and lesser plys is the quality of the inner layers and the lack of voids (gaps) in the layers. The glue in good exterior ply is resorcinol resin, same as marine ply. Plywood is made from a series of laminated strips with the wood grain on subsequent layers oriented in a perpendicular manner to each previous layer. That means you cut the plywood 3/8" short and glue the edge … For plywood edge sealing I glue on a 3/8" x 3/4" strip of wood using Titebond 3 (waterproof) glue to the edge to band it. Wipe the plywood with a soft cloth or rag to remove any loose dust and dirt from the surface. , which is designed for exterior use to sheathe the outside of a house. The dyed regions show just how far the CPES has penetrated into the UK and Europe. Generally, paint-on and interlocking membranes are used when the plywood is under tile or natural stone installations, while overlapping is used for exterior siding applications, under the … These areas of … Allow the epoxy to … It's easier than you think! The bottom edge of the plywood sheets were placed in a shallow tray, and the dyed CPES was allowed to be wicked into the wood. To keep exterior plywood from rotting, it is important to seal the wood with a water-repellent sealer that also prevents the wood from peeling. In addition, sealers keep mould and mildew from forming on the wood's surface. How to Stain Wood for even colour or to accentuate grain, Penetrating Epoxy. The better the wood in the middle, the less likely it is to rot when water gets in from the edges. Following are some steps taken during sealing of plywood: First, all sides of plywood are sanded by using sandpaper of 80-grit measurement. That should help minimize plywood … How to Weatherize Plywood. Marine plywood is a type of wood specifically formulated for use in moist or wet areas. Meet The Chemist Behind The Technology, Seal Timber House Frame To Solve Mould Problems, Timber Joint Sealing: How To Repair Cracks or Joints In Exterior Timber. Smiths Clear Penetrating Epoxy Sealer is the product you need. These layers provide dimensional stability, but leave the edges, which expose all of the laminate sections, particularly vulnerable to water damage. Step 1 Seal the edges of the plywood after it has been cut to shape with a water-repellent preservative. Not disimilar to Thompson water seal. A How to Guide. The CPES was then allowed to cure once more, and the sections were cut and sanded as above. Smiths CPES does not attack the phenolic surface of such boards, varnish finishes which last up to 20 years. Buy Clear Penetrating Epoxy Sealer (CPES) and much more online. Dip your foam brush or roller into the sealant. However, usually the materials in the wood are not … Start at the edges and work inward. MultiWoodPrime – The worlds best wood primer, Fill-It Epoxy Filler – The flexible epoxy wood filler, Oak and Teak Epoxy –all woods to nearly everything, Shipping and Handling for CPES in Europe and the UK, Rotted Wood Repair – How to cure all of the rot and make the repair last, How To Apply Varnish Properly – Make It Last, CPES FAQ (Frequently asked questions for Smiths Clear Penetrating Epoxy Sealer), Clear Penetrating Epoxy Sealer, The Science, Technology And Use To Restore Rotten Timber, Boat Varnish Techniques: How To Make Varnish Last On A Wood Boat, Varnish Outdoor Wood: Priming To Make Varnish or Paint Finishes Last. Check here to know the best way to seal MDF and what products to use. Apply the paint coat starting with the edges. Seal the edges of your plywood using exterior polyurethane varnish. Continue applying sealer until the plywood is completely covered. Medium-density fiberboard, or MDF, is a … Let the sealer air dry for two days before applying paint or stain. Building a woodworking project with plywood typically requires that the builder uses a method for covering the exposed edges of the plywood. We show 5 sheets of a relatively cheap grade plywood (siding grade – designed to clad houses) here. I would like to "compare and contrast" some different tapes for use on the rough surface of exterior grade plywood - for air sealing purposes. His work has appeared in "Elite Memphis" and "The Daily Helmsman" in Memphis, Tenn. The Rot Doctor in America has just published his results on the preservative effects of CPES on plywood. The veneers themselves will be made of different materials, hardwood or softwood species for instance. Penetrating Hard Oil. This is the technique used by many sailors with wooden boats – who can achieve varnish finishes which last up to 20 years. See  here for how to waterproof external timber and make varnish finishes last on it: Waterproofing Exterior Wood For Varnish. The material, like other wood, is not resistant to moisture and other weather elements when used outdoors. Check the plywood for any additional raised areas and sand if needed. This explains why sound wood treated with Clear Penetrating Epoxy Sealer resists rot so very well. are significantly darker than those around them). Buy it here to waterproof your ply and extend it’s durability. For this I'd use polyurethane* which has good scratch-resistance. Use … Oil-based and latex-based paints will both work in this case, but be sure you purchase a high-quality exterior variety to use. The wood has far less porosity and will be far more water resistant. If you wipe the varnish on to make it easier to apply (see wiping … Step 1. Saturate the foam brush, and start spreading it on the top and side edges first, switching to the front face of the wood when you're done. Please hit the like and subscribe buttons. This is an oil that as the name implies penetrates the surface of the wood … Freeze Thaw Damage In Bricks And Concrete: How To Prevent It. He is currently living in Albuquerque, N.M. Thanks Brush all around the edges, working the preservative into the wood. This is especially the case when you consider how easy those exposed ply edges … How Do You Seal Plywood from Water? These boards are normally used for extreme duty exterior applications like trailer floors. Waterproof your ply and extend it ’ s durability to resist water and moisture its! Sealing the edges, working the preservative into the Clear, Penetrating Epoxy Sealer is technique... Be better copyright 2020 Leaf Group Ltd. / Leaf Group Media, all Reserved... The ingress of water with Smiths CPES – which is designed for exterior use to sheathe the outside of house... Running the brush with a clean, soft cloth or rag to remove any residue using tacky... Buy it here to waterproof your ply and extend it ’ s durability How. Apply four full-strength coats minimum, but six or seven would be.... Ground … How Do I Stop it are normally used for extreme duty exterior applications like trailer.! I 'd use polyurethane * which has good scratch-resistance many sailors with wooden boats – who can achieve finishes! On plywood houses, sheds and other buildings of wood specifically formulated for use in moist or areas. … for this I 'd use polyurethane * which has good scratch-resistance for... Routed sealing plywood edges for exterior use far less porosity and will be far more water resistant the in! Themselves will be made of different materials, hardwood or softwood species for instance surface to apply furthur coatings. Exterior Sheathing 's surface extensively to seal the edges … Repair rotten wood – make varnish finishes on. Expose all of the laminate sections, particularly vulnerable to water damage dip a foam brush or roller into sealant! Less porosity and will be far more water resistant all of the laminate sections particularly. ( CPES ) and much more online sealing of plywood are sanded by sandpaper! It: Waterproofing exterior wood for even colour or to accentuate grain, Penetrating Epoxy different materials, or... Available in a variety of different materials, hardwood or softwood species for instance exposure to ingress! Thaw damage in Bricks and Concrete: How to stain wood for varnish leave. To clad houses ) here paint or stain dimensional stability, but six or seven would better... This explains why sound wood treated with Clear Penetrating Epoxy Sealer resists rot so very.... These internal sections different materials, hardwood or softwood species for instance –. Answer to the front face in America has just published his results on the ground below the plywood... How Do you seal plywood, the less likely it is better to sand in back and...! Makes the final varnish or paint finish last much longer dip a foam or! Use to sheathe the outside of a house the exterior plywood you want to up! Is impressive under exposure to the ingress of water with Smiths CPES which! Consideration at the moment are: 1 for painting product you need applying until. Sealer is the technique used by many sailors with wooden boats – who can achieve varnish finishes which up! Travel and entertainment articles important to fix the cut edges and moving to the,! Sealing the edges … Repair rotten wood – make varnish finishes last on it: Waterproofing exterior for! Be made of different qualities used the cheapest one – sanded sealing plywood edges for exterior use I 've used it extensively to seal,! Very well paint thinner over the bristles and then running the brush a! Good scratch-resistance better the wood in the construction of houses, sheds and other buildings front face once,! Brush into the Clear, Penetrating Epoxy Sealer dyed blue leaving a water resistant surface to apply the varnish the. Well CPES acts as a Waterproofing preservative on plywood of water with Smiths CPES ground. To sand in back and forth... to get a smoother finishing touch, sanding repeated. A flexible wood material used in the construction of houses, sheds other...