99 Reply. Once applied, varnish protects the surface of the wood and imparts a glossy finish. Wood varnish is an effective means to âwear-proofâ any wooden materials on your sailing vessel, ensuring ongoing protection from water damage, mould, and mildew. Even the humidity in the air will make wood swell and since a polyurethane is a harder finish is more likely to crack because of the weather. Piffin. If you want real varnish, then you have to accept it will take all damn day to dry, but it's an honest coating, easy to repair, over coat, blend, etc. Polyurethane varnish is highly durable. Shop a huge collection of marine varnish vs polyurethane for sale. There are plenty of products that are truely varnish that don't have polyurethane as an ingredient. 99 - $119.99 $ 119 . Here's the trade-off. This can be beneficial for wooden surfaces, as they will be able to bend and expand and contract as needed. The drying mechanism is identical however Susan Rhoades. You may also think of polyurethane as urethane, but they are actually two different components. It is resistant to heat, chemicals, and wear and tear such as scratches. But, to my eye, this looks almost as nice as varnish. For marine use, where sunlight (UV) can damage the wood and the finish, UV absorber chemicals are added to spar varnish to slow the UV damage. It creates a finish that looks shiny ⦠It is an elastic, durable and easily processable substance, well suited for wire and cable coatings, engine tubing, drive belts, hydraulic hoses and ⦠Then there are different grades of spar varnish. In the case of air drying polyurethane varnishes the vegetable oil is reacted with isocynates & polyols instead of the phthalates & polyols. Top coating polyurethane with marine varnish on exterior doors. Tweet. I would use a marine grade spar. Spar varnish must be reapplied periodically as it will chip, flake or chalk off over time. They are very similar and some people even use the phrases interchangeably. Pros: Cetol is easier to apply than varnish (put on 3-4 coats, no work in between coats) It's easier to remove than varnish ; It lasts 2-3 years before you need to re-touch (varnish lasts 6-12 months) Cons: in general, varnish has a deeper and richer look vs. cetol Water-based polyurethane can have less of an offensive odor when compared to oil-based products, but floors require at least four coats to achieve the desired level of protection. Be sure to stir well when using these flattening agents. Like polyurethane, Varnish is a curing finish. Spar urethane is a synthetic product made either as a water-based or oil-based product. This type of finish can significantly outlast varnish alone, but unlike a two-part polyurethane finish, it needs frequent recoating. Regular polyurethane and varnish contain little, if any, UV blocking additives, and that alone makes them a poor choice for exterior application. Spar Varnish. The idea here is that the epoxy adheres better than varnish and is less likely to separate from the wood. Many woodworkers turn to oil-based polyurethane because it is the more durable out of the two options. Varnish is a hard, transparent topcoat that we use to coat wood. When you look at urethane vs polyurethane, you will notice that urethane can be molded into different shapes while polyurethane is only for hard, flat surfaces like side tables. 03:09PM | 04/08/03. 5 Shares. Pin 1. It was sanded, stained and finished with Marine Spar Varnish. Cetol Marine can be applied anywhere that you would use varnish, but is particularly suitable for areas that endure hard useâgrabrails, swim platforms and ladders, or the cockpit sole, where it produces a surprisingly durable and non-slip finish. We use it on wood that will receive much wear and tear like flooring. The Differences Between Shellac and Polyurethane, Varnish and Lacquer September 19, 2011 Shellac vs Polyurethane Dave Wood finishing, as its name suggests, is the last step in the process of repairing and refinishing furniture. It comes in three shades; Cetol Marine, Cetol Marine Light, and Cetol Marine Teak. Marine Spar Varnish. ... Varnish vs Polyurethane -Wood Finish Pros & Cons. Comparing a highly modified alkyd base like the MinWax Spar Varnish (which truly sucks compared to real varnish) to a fast drying polyurethane just isn't comparing apples to apples. The other major distinction to look for in a varnish is the use that it is created for. Some varnishes may even contain polyurethane. Traditional Varnish and Polyurethane Toxicity Issues. Spar marine varnish is a natural oil based product that is designed to protect wood. If these finishes are exposed to the sun and rain year around, they may last 2 to 4 years before they start to break down. Because of the higher ratio of solids, varnish is less susceptible to ultraviolet light damage. Blog Marcus Gatley. Oil-based spar urethane requires several hours between coats. Polyurethane vs Urethane vs Shellac. Take a bristle or preferable an ox hair brush, and brush the varnish on brushing in one direction going from dry to wet. Last but not least, every spar varnish needs to protect itself and the underlying wood from the sun. There are many clear wood finishes on todayâs market. Share 4. Spar urethane vs. polyurethane can be a difficult debate, but polyurethane typically wins when it comes to indoor applications. With polyurethane varnish, you get a clear and hard finish that comes in gloss, satin, or matte. Without UV protection, varnishes and wood quickly break down and fail. Member Since: 11/06/02 ... polyurethane vs. tung oil. TotalBoat Halcyon Marine Varnish | Water-Based Polyurethane Wood Finish | Clear Gloss UV Protection for Interior and Outdoor Use 4.7 out of 5 stars 62 $17.99 $ 17 . Spar Urethane vs Polyurethane: Difference â Pros â Cons. It has a high degree of heat resistance, as well. Varnish is typically a glossy finish, but flattening agents can be added. Thermoplastic Polyurethane (TPU) Another polyurethane material great for use in the maritime industry is thermoplastic polyurethane, or TPU. Helpful. Spar varnish, sometimes referred to as marine varnish is created specifically for outdoor use. Marine (boat) varnish is spar varnish with ultraviolet-light absorbers added to resist penetration by UV rays. Marine spar varnish and exterior polyurethane finishes usually soak into the wood a little bit, but mainly build up on the surface. Purchasing one with maximum UV (Ultra Violet Light) protection is important. The ravages of time and use of a piece of furniture can be limited by a durable top or finish coat. Great job. It is semi-thick, tends to flow off brushes nicely, imparts a warm amber color to surfaces, and is easy to re-apply over old varnish providing that the old varnish is not too badly degraded. Spar Urethane. Varnish vs. Polyurethane November 29, 2016 by jim 1 Comment Here is a great article TinBoats member Johnny put together to highlight the difference between Varnish vs. Polyurethane. Marine spar varnish with UV protection. Traditional varnish (sometimes called Spar Varnish or Marine Varnish) is a resin in an oil base with solvents. Unlike polyurethane, varnish is designed for outdoor projects and is not typically used for indoor surfaces such as a hardwood floor. I am building a surround for a large soaking tub. Varnish is an older type of finish made from resins, oils, and solvents, but very often, the term "varnish" is misused as a generic name for all types of wood finishing. Polyurethane vs. Varnish. Polyurethane differs from varnish in many ways that donât matter to us very much, namely the way it is made, and the chemical process it goes through to âkickâ. Behlen Rockhard, Pratt & Lambert 38, McCloskey Heirloom, Ronan Quick Rubbing Varnish. Many marine varnishes are made with phenolic or polyurethane resin and tung oil because these provide the best resistance to water. Epoxy is, however, prone to UV damage, so the overcoat of varnish provides essential UV protection. We all know that furniture has to be protected especially wooden ones and if you leave it outdoors to stay all the time. Selecting a Varnish Lowes sells a Cabot brand marine grade spar that is pretty good but the best would be Epifanes. Most varnish is created for indoor use, where the wood and the varnish on it are protected from weather and ultra-violet light. Polyurethane is a water- or oil-based plastic resin used for coating wood or as a wood finish. ... Buy two quarts of Marine varnish one gloss and the other the sheen of your choice. Water-based spar urethane has easy cleanup, less fumes and dries in a short time period. It has natural UV protecting properties. Polyurethane is a term used when isocynates are included in the product. While polyurethane is a synthetic material, tung oil stain is organic and made from the pressed seed extract of the tung tree. The painter told me for maintenance I should revarnish at least 6 â 12 months every year. As a woodworker, you will come across situations regularly where you have to apply finish to wooden surfaces. While polyurethane is water- or oil-based plastic resin, varnish is older and made from resins, oils, and solvents. This article compares the two in terms of pros and cons, application and equipment, and maintenance and clean-up. This gives chemical bonds that are superior for chemical & water resistance. Because of its composition it is can allow wooden surfaces to maintain their flexibility. While the terms varnish, polyurethane, lacquer and shellac are commonly used to reference a final finish in general, these products are not the same, nor are they recommended to be used interchangeably. Get marine varnish vs polyurethane! Studying spar varnish vs spar urethane â the differences we come to the conclusion that both these components are used for similar reasons. Polyurethane: Polyurethane is a finish/sealant that has a very similar application and appearance to varnish, and therefore the two are often used interchangeably. on Jun 6, 2017. Two of the most popular are polyurethane varnish and tung oil stain. 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