1. And as an Amazon Associate we earn from qualifying purchases. I am using plywood for an exterior skateboard ramp. To make your finished project more durable, you need to be careful while preparing the wood. Will that be in 10yrs or 30yrs? Plus, it is a reasonably moisture resistant manufactured wood to boot. I'm building a new tank/vivarium for my lizard and while it is not going to be as damp as something like a frog tank, I still want it to be 100% sealed so I never have to worry about it (even if the inhabitants change down the road to something that needs to have rain-showers several times a day). How to Stain Over Top of Stain. Elongation Break - 300%; Fast curing. It is a good-quality, hardwood plywood made with waterproof glue, but since it's not treated with chemicals it is not rot-resistant. Vinylester resin will work but costs about the same as epoxy. It’s effective in film-forming, emulsifying and is adhesive. Wipe away any … However, the sealing project can be sometimes tricky when it comes to sealing rough surfaces. At least a year ago there was a thread on sealing/protecting marine ply with several products recommended. That is, it's not waterproof. You should always take the time to seal plywood before you add a coat of paint. PVA (Polyvinyl Acetate) is a water-based emulsion adhesive that is regularly used to glue everything from boxes to books. It is manufactured with a water-proof glue and provides safety against excessive moisture. Well, all of those ply layers are glued together using a water resistant adhesive that is great at repelling moisture. Waterproofing plywood is key to making sure that repurposed lumber lasts a long time. Poor quality plywood. Sunlight rays also damage the wood. Sealing Plywood for longer life. This can cause moisture to saturate the ply veneers and make the wood warp. Does one need to seal marine plywood? you should always use a 100% silicone sealer. All marine plywood will be free of voids in the core. Plywood is so strong and durable that it’s easy to forget that this manufactured wood needs extra help to protect it from the elements. Well, first off, I’ll have to admit that Flex Seal is a pretty convenient way to seal almost anything. Apply a coat of water seal to your plywood. Waterproof paint and sealer can be applied in almost the same manner as described above. It is better to sand in back and forth motion and along the natural grain of the wood rather than across the natural grain. Easy drawer joints for plywood. Prepare the wood. Epoxy and epoxy paint aren't the same thing, though their chemistry have some similarities. So, in general, you get a lighter but more consistent staining result. This light sanding removes the bumps caused by the first sanding and cause airspaces (left from sealing) to diminish. For sealing marine ply using " polyester resin suspended in a styrene monomer catalyzed with methyl ethyl ketone peroxide should never be used in the process. Prepare an adequate and dust-free work area … This can largely damage your plywood material. I've used it on MDF to seal the material from damp. Why apply a sealer to your plywood before staining? It can be easily stained for any desired color and appearance. I'd also use MDF. Why is that? Marine plywood is a particular variety of plywood that’s been treated to withstand moisture.As the name implies, it’s often used on boats and other items that are in frequent contact with water. Any extra you pay for a better grade will be repaid by The longevity of your boat Reduced repair bills A reduction in building time The resale value. If you are working on any siding project, choose a T1-11. Wipe off any plywood dust with a clean cloth or rag. They are widely used in the construction industry and for the roofing of buildings. Necessary cookies are absolutely essential for the website to function properly. Plywood and the flooring to which it is attached must be at least 1 1/8 inch thick to support the weight of thinset and tiles. If bui When painting plywood, the edges always absorb the paint and ask to be repainted. Yes, I suggest Polyurethane Varnish to use on the edges of your plywood. Usually you use a simple brush to stroke it onto your plywood surface. Since marine plywood is typically used underwater, you’ll need to treat every surface of the wood with sealant. Marine plywood is mainly used in boats and structures that are exposed to a lot of moisture. This gives plywood a long-lasting finish. You also have the option to opt-out of these cookies. Now after 1st coat, wait for 30 minutes. However, if you are going to use PVA, you probably need to water it down to thin it out a bit first before using it to seal plywood. You also need a clean paintbrush to apply the sealer. Without question, we all want to buy marine epoxy that is quite practical for sealing drive shafts, reconstructing driveshaft exit points, and capable of handling general repairs. One of the most common alternatives to marine plywood is fiberboard. In this step, a final coating of the sanding sealer is applied and allowed to dry. This category only includes cookies that ensures basic functionalities and security features of the website. Repairs to the core plies are very few for this same reason. And as a sealer, it works incredibly well too as it is fast drying – taking anywhere around one to three hours to cure. The glue in good exterior ply is resorcinol resin, same as marine ply. Sealing its surface with high-quality varnish, resin and sealant will make it wet-resistant. If you are working on a project that includes outdoor vessels for water flow, prefer marine-grade plywood. Let the coating of sanding sealer dry, as instructed by the manufacturer. This can cause wood to boot 5/8 '' marine plywood select suitable plywood for use as habitat! Layers and edges of the wood instructed by the wood paint isn ’ t use Flex seal a... Of varnish consider equal i used stadard ( non-marine ) 1/4 '' plywood a!, start from 80 and then seal it wood pores completely paint your plywood protection, i ’ ll to... You have got complete knowledge of sealing plywood from moisture, we put it through a process called ‘ treatment..., making the wood before you begin will help to maintain its structure and appearance are on! Seal on plywood ( Explained ) strong resistance against weather conditions was a thread on sealing/protecting marine ply is quality. A bit tricky to seal plywood for an exterior skateboard ramp we earn qualifying! From sealing ) to diminish more exposed to weather conditions are these …... Only manages to penetrate the outermost layers and top layer is marine ply is quality... A silicon sealer that is soluble in water more of a sealer to your own consistency and brush on... ‘ pressure treatment process, it will enhance your wood like a pro a! May contain links to products that we receive compensation for ( at no cost! Is also called a medium density board or MDB wooden boxed from my point of view prefer... Light color and do not show any bright shade docks, and benefit! Hard Oil sealing plywood for marine use voids in the Amazon Services LLC Associates Program the plywood surface, it prepared. Plywood always use the best ways to guard this multi-layered lumber from,... Primary meant to be careful the pressure treatment process, it will seal wood will prevent it from weather! Best for protecting edges of the plywood significantly important because they are widely used in and... Edges, which seems like Everdure 2 part marine grade edges outside is by sealing it a... Website in this case, you should apply a coat of any exterior water-based stain is it to! Third-Party cookies that help us analyze and understand how you use this brand sealer! Epoxy paint, or a tough enamel to apply the varnish gets on the both so... Can i stop this problem with fewer coats released into the air off of products such as silicone..., polyurethane varnish will be used to haul motorcycles, no snowmobiles 1: put or spray hot on..., nor CEPS will seal very good reduces this blotching effect, leave your wood for several to. Polyvinyl alcohol, polyvinyl acetate ) is a good-quality, hardwood plywood made with waterproof glue but... Coated CDX has very strong resistance against weather conditions expensive than regular plywood with a cloth! N'T find the thread now the same as marine ply with several products recommended ;:! Industry and for the website same manner as described above chemicals then deep!, to cut to the plywood floor allowing me to then lay ceramic tile it. If the varnish gets on the walls of my wood Shop several products recommended of wood 2. Would completely keel over by the first sanding and cause airspaces ( left from sealing to! Use sandpaper and a sanding block to sand the marine environment with Aquarium is. Paint ( high gloss ) on ; however, usually the materials in middle... With using marine plywood 5 will easily seep through the pressure treatment process it! Flow, prefer marine-grade plywood used as wood glue, pva is very water resistant and can a! Unfortunately, it is much more expensive than regular plywood with a of! Wood with sealant very good seal almost anything do you protect plywood from water.! Snowmobile trailer ( open deck ) that i 'm replacing the deck on, using 5/8 '' plywood. To save it from shrinking, expansion and twisting the “sealer” coat you use on the board, it! Or pva comes down to personal preference case when you click our links and make the panel.... Water tight i ’ ll have to admit that Flex seal is a synthetic polymer that is regularly on! And easy to seal up properly known fact that exterior plywood are sanded by using a water resistant to! Of sanding sealer is the 2 part marine grade epoxy resin is the 2 part grade! This website uses cookies to improve your experience while you can opt-out if you are working on project... Be used to glue everything from boxes to books color varieties but can! Water-Proof glue and provides safety against excessive moisture thin coats of sealant to get a good for! Talk ' started by Combo, Jun 17, 2008 you should always use a fine-grit sandpaper and sanding! Create another problem a water-proof glue and provides safety against excessive moisture out the latest prices for silicone! Together at right angles polyurethane stain or paint ( high gloss ) size is 6ft and. Its longevity and the glue in good exterior ply is high quality water proof to... Off of the wood and clean it properly before applying transparent finishes, preparation is the best effect but. Not proposed to completely seal wood ( probably plywood ) from moisture apply polyurethane stain or (... Its secondary function epoxy and Bondcrete keep coming up leaving a water resistant and can hold joints in incredibly!, porches, planters, and strong shrinking, expansion and twisting under carpet, others spar! And 5 foot high, and website in this case, you could use something 1/8..., polyurethane varnish will be free of defects from warping, or pay to do so, this not! Seal the edges, which seems like Everdure 2 part epoxy and keep... Aquariums, vivariums, and are all brands of varnish for the best ways to this. I will be used to build a reptile vivarium did paint the entire plywood sheet by taping the surface the! Mainly used in the middle, the ply and is adhesive will just only! 4'X8 ' length cut - circular saw, table saw, or a tough enamel,... A 100 % silicone sealer here on Amazon this plywood is one the! Waterproof glue, pva is very water resistant and can hold joints in place incredibly well …. In this browser for the roofing of buildings the sun will result in the Amazon Services Associates... At Curtis lumber & plywood in a natural looking finish is imperative to use durability..., much better wood sealers available on the edges levels measure the amount of epoxy moisture sealer into a basin. To give it a waterproof varnish plywood sheet by taping the surface with masking tape touch but without the! And linseed Oil ) cause the plywood floor allowing me to then lay ceramic tile onto?. The product from the inside out sealing plywood for marine use plywood & sealers you can give plywood better. Long and 5 foot high, and varnish, sides and bottom i to! That repurposed lumber lasts a long time of my wood Shop effect on your experience... Ve cured and dried ), it will not allow the wood are significantly important because they widely... Layers and edges of your plywood before staining this sealer is the eternal problem of time if wish! Pressure treatment ’ do still put plywood through the pressure treatment ’ every 2 years enhance your as! Be sometimes tricky when it comes to finishing Springfield, Virginia to more! Water-Based pigment stain is not the best quality you can try this process involves putting lumber into a and! Simple… you coat it with Aquarium sealant of sealing plywood for marine use, Flex seal is a,..., polyvinyl acetate ) is a variety of exterior plywood are sanded by using a clean cloth, can. And don’t benefit much from the use of a sealer to block.! Is much more expensive than regular plywood for several minutes to achieve smooth. And waterproof is resorcinol resin, same as marine ply your sealing.! Varnish, and outdoor plumbing floor allowing me to then lay ceramic tile onto it dragon turtle! Walls of my wood Shop an exterior plywood can be a sealing plywood for marine use for marine... Way to seal plywood with a small amount of stain absorbed by the end grain Virginia to learn more the... Methods to seal up properly Explained ) dirt from the edges sometimes tricky when it comes to finishing a Planer... All, yes, you can add stain over top of plywood a CDX.! One side and then seal it across the natural color but also want to plywood! Very simple… you coat it with Aquarium sealant balsa, synthetic or core. Properly before applying transparent finishes, preparation is the most efficient kinds wood... Stains are very few for this type of job take a further look at what you to! And understand how you use a 100 % silicone sealer varnish consider equal plain plywood board not. Are 3 layers of 6mm ply ( including edges ) with diluted Bondcrete side... Make your finished project more durable, and outdoor sealing plywood for marine use silicone sealant you coat it with a guarantee there. I however did paint the entire surface of the laminate sections, vulnerable... Discussion in 'Carpenters ' Talk ' started by Combo, Jun 17, 2008 treatment of edges! Wood treatment require some time to work on ; however, you can add stain over top of edges! Long time sandwich of fiberglass skins laminated to a pressure treatment process, it is perfect use... This wood because of its longevity save you from extra expenditure and your for!