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This provides an excellent blend between beauty and longevity. At one time, varnish was made from a combination of plant-based resins, linseed oil, and turpentine. Today, most varnishes use blends of synthetic resins: polyurethane, phenolic, or alkyd polyester. Polyurethane, also known as urethane, is more durable than the other resins, but is also more likely to crack in marine environments.
Modern varnishes, which are essentially plastic, provide excellent moisture resistance. Spar varnish, also called long oil varnish, simply has a bit more oil in it. This makes the varnish more flexible, which is useful for nautical equipment like spars in changing weather conditions. As environmental concern increases with respect to the volatile solvents in varnish, water-based products are increasingly appearing on the market.
Many offer protection equivalent to oil-based varnish though the finish looks slightly different. When Marine Wood For Boats 2015 choosing varnish, look for tung oil and a base of phenolic resin flexible or polyurethane resin hard and durable. Follow the application directions and pay particular attention to minimizing dust. Resist the temptation to stop at one or two coats. Do not apply varnish in direct sunlight, on damp days, or in high humidity. The unique depth and color of the finish on fine antiques can be achieved with only one product: shellac.
Derived from the secretions of a tiny insect � the lac bug, Laccifer lacca � shellac is widely used in the culinary arts for glazes but has fallen out of favor in woodworking since the advent of synthetic resins, which are easier to apply. Yet shellac is a wonderful finishing product: highly water-resistant if fresh, of good quality, and applied properly , non-toxic, easy to repair, and with a lovely hue that no other finish can match.
For interior woodwork, shellac is unquestionably the most elegant solution. The learning curve for proper application is somewhat steep, but the rewards are stupendous. Each coat of shellac must be very thin, so twenty or thirty coats is typical.
After extolling the virtues of shellac, an ancient finish that has fallen almost entirely out of use, it seems only fair to introduce an entirely new and technological approach. Traditionalists and woodworking purists will object to epoxy on philosophical grounds, but epoxy is superior to every other kind of finish in strength, resilience, and moisture-resistance.
The wing skins of fighter planes are made from epoxy. Unlike varnish, which is somewhat permeable, epoxy completely seals the underlying wood. Any remaining moisture could show up beneath Marine Wood For Boats Jp the film. And if water enters from the outside and becomes trapped, the wood will rot.
Epoxy is also expensive. But with these caveats in mind, epoxy is an ideal base finish. Many boat builders use the West System formulations, which come in two-part kits containing a clear resin and a special coating hardener number Follow the directions exactly.
After applying several coats, finish the job with two or three coats of good quality varnish; ideally, a two-part polyurethane. This will add color depth and, more importantly, will protect against degradation of the epoxy film from UV rays.
Use a gloss if possible, to maximize sunlight reflection. These two combined finishes provide substantially more protection than either used on its own. Finishes require regular maintenance and replacement. Epoxy and varnish combinations will last longer.
More coats of any finish means more durability. Maintenance coats applied every year, or every season with oil, prevent substrate damage and extra work. Do the job properly from the start, maintain the finish frequently, and your wood will shine. You know the look: a russet orange in the wood, warm and distinctive.
And very popular. Cetol, a line of wood finishing products made by Sikkens a subsidiary of Akzo Nobel, a European coatings company , has made significant progress in the North American market over the past several years.
Boats and barracks during World War II were made out of plywood. In the postwar building boom, plywood was used to build houses and cities across the United States. By , the industry grew to more than mills and production approached 4 billion square feet, according to APA. Even though the plywood products sold by most hardware stores are graded A, B. Standard plywood is made with fewer, thicker layers and mostly contains softwood, like pine or Douglas fir. The interior layers also have voids, or holes, that you can't see until you cut into the plywood panel.
Marine plywood is a type of hardwood plywood. True hardwood plywood is made with thin layers of percent hardwood, which generally is stronger and harder and has a finer grain than softwood. Plywood sold as "void-free" does not have voids hidden in the wood layers. As for the layers, a lot of thin layers is better than fewer thicker layers because thinner results in a stronger, denser panel with edges that cut and sand cleaner. Experienced do-it-yourselfers and woodworkers use marine plywood for various outdoor projects, including:.
APA Product Guide. These satin coatings gained popularity with cruisers in the tropics looking for UV-resistant, low-maintenance brightwork. They are remarkably durable, easy to apply and look relatively good. We say relatively good because some of these products, like Cetol Marine, tend to have a pigmented appearance, with an orangish brown cast.
This is caused by synthetic iron oxide pigments that protect the wood's lignin a key component in the strength of wood which is degraded by UV light exposure. Full gloss and depth take a back seat to ease of application and fast drying times with these finishes. Cetol comes in four varieties, with the Natural providing a more golden color resembling the real look of raw teak. Typically, you can apply one coat of Cetol every 24 hours.
Overcoat any of the other Cetol finishes with the Gloss for a shiny exterior finish. When applying Cetol Gloss, masking surrounding areas is highly recommended. We use cookies to optimize site functionality and improve your overall experience. You can change your cookie settings through your browser. To learn more about cookies, please see our Privacy policy.
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