Be sure to stir well when using these flattening agents. As a woodworker, you will come across situations regularly where you have to apply finish to wooden surfaces. It comes in three shades; Cetol Marine, Cetol Marine Light, and Cetol Marine Teak. Varnish, whether it contains alkyd or polyurethane resin -- or a combination -- is an example of a curing finish. 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. Last but not least, every spar varnish needs to protect itself and the underlying wood from the sun. Water-based spar urethane has easy cleanup, less fumes and dries in a short time period. Some varnishes may even contain polyurethane. Here's the trade-off. Without UV protection, varnishes and wood quickly break down and fail. Piffin. Spar Varnish. You may also think of polyurethane as urethane, but they are actually two different components. Reply. While the latter is more concentrated and is limited because of the same, the former is more conventional in nature and can be used more extensively. Marine (boat) varnish is spar varnish with ultraviolet-light absorbers added to resist penetration by UV rays. Susan Rhoades. Thermoplastic Polyurethane (TPU) Another polyurethane material great for use in the maritime industry is thermoplastic polyurethane, or TPU. We all know that furniture has to be protected especially wooden ones and if you leave it outdoors to stay all the time. 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. 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. Spar varnish must be reapplied periodically as it will chip, flake or chalk off over time. The drying mechanism is identical however The ravages of time and use of a piece of furniture can be limited by a durable top or finish coat. This can be beneficial for wooden surfaces, as they will be able to bend and expand and contract as needed. Great job. 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. 03:09PM | 04/08/03. Spar marine varnish is a natural oil based product that is designed to protect wood. Oil-based polyurethane is a highly durable finish, but it is also easy to apply. Spar Urethane vs Polyurethane: Difference – Pros – Cons. Polyurethane varnish is highly durable. But, to my eye, this looks almost as nice as varnish. Varnish is typically a glossy finish, but flattening agents can be added. 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. Polyurethane Varnish Polyurethane Clear Finish (Amazon) Polyurethane varnish creates a tough surface once cured. Polyurethane is a water- or oil-based plastic resin used for coating wood or as a wood finish. on Jun 6, 2017. I am building a surround for a large soaking tub. They are very similar and some people even use the phrases interchangeably. Like polyurethane, Varnish is a curing finish. Purchasing one with maximum UV (Ultra Violet Light) protection is important. It creates a finish that looks shiny … Spar urethane vs. polyurethane can be a difficult debate, but polyurethane typically wins when it comes to indoor applications. Oil-based spar urethane requires several hours between coats. ... Varnish vs Polyurethane -Wood Finish Pros & Cons. Selecting a Varnish It is resistant to heat, chemicals, and wear and tear such as scratches. Because of its composition it is can allow wooden surfaces to maintain their flexibility. The idea here is that the epoxy adheres better than varnish and is less likely to separate from the wood. Regular polyurethane and varnish contain little, if any, UV blocking additives, and that alone makes them a poor choice for exterior application. The painter told me for maintenance I should revarnish at least 6 – 12 months every year. Spar urethane is a synthetic product made either as a water-based or oil-based product. While polyurethane is water- or oil-based plastic resin, varnish is older and made from resins, oils, and solvents. It is an elastic, durable and easily processable substance, well suited for wire and cable coatings, engine tubing, drive belts, hydraulic hoses and … Pin 1. 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. Varnish is a hard, transparent topcoat that we use to coat wood. It has natural UV protecting properties. This article compares the two in terms of pros and cons, application and equipment, and maintenance and clean-up. Traditional varnish (sometimes called Spar Varnish or Marine Varnish) is a resin in an oil base with solvents. Tweet. 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. Take a bristle or preferable an ox hair brush, and brush the varnish on brushing in one direction going from dry to wet. Unlike polyurethane, varnish is designed for outdoor projects and is not typically used for indoor surfaces such as a hardwood floor. Polyurethane vs Urethane vs Shellac. It was sanded, stained and finished with Marine Spar Varnish. Member Since: 11/06/02 ... polyurethane vs. tung oil. 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. Polyurethane is a term used when isocynates are included in the product. 99 - $119.99 $ 119 . Because of the higher ratio of solids, varnish is less susceptible to ultraviolet light damage. Can i just apply a very thin coat of Marine Spar varnish over the door without lightly sanding down the old varnish? Polyurethane vs. Varnish. Epoxy is, however, prone to UV damage, so the overcoat of varnish provides essential UV protection. Polyurethane differs from varnish in many ways that don’t matter to us very much, namely the way it is made, and the chemical process it goes through to “kick”. Marine spar varnish with UV protection. Behlen Rockhard, Pratt & Lambert 38, McCloskey Heirloom, Ronan Quick Rubbing Varnish. It has a high degree of heat resistance, as well. The other major distinction to look for in a varnish is the use that it is created for. Marine Spar Varnish. Many marine varnishes are made with phenolic or polyurethane resin and tung oil because these provide the best resistance to water. 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: Polyurethane is a finish/sealant that has a very similar application and appearance to varnish, and therefore the two are often used interchangeably. Then there are different grades of spar varnish. 5 Shares. 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. Marine spar varnish and exterior polyurethane finishes usually soak into the wood a little bit, but mainly build up on the surface. ... Buy two quarts of Marine varnish one gloss and the other the sheen of your choice. Once applied, varnish protects the surface of the wood and imparts a glossy finish. 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 . This gives chemical bonds that are superior for chemical & water resistance. Cetol Marine can be applied anywhere that you would use varnish, but is particularly suitable for areas that endure hard use—grabrails, swim platforms and ladders, or the cockpit sole, where it produces a surprisingly durable and non-slip finish. 99 Many woodworkers turn to oil-based polyurethane because it is the more durable out of the two options. Traditional Varnish and Polyurethane Toxicity Issues. There are many clear wood finishes on today’s market. Two of the most popular are polyurethane varnish and tung oil stain. We use it on wood that will receive much wear and tear like flooring. Shop a huge collection of marine varnish vs polyurethane for sale. Spar varnish, sometimes referred to as marine varnish is created specifically for outdoor use. 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. 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. 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 Wood varnish is an effective means to ‘wear-proof’ any wooden materials on your sailing vessel, ensuring ongoing protection from water damage, mould, and mildew. With polyurethane varnish, you get a clear and hard finish that comes in gloss, satin, or matte. Helpful. 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. Top coating polyurethane with marine varnish on exterior doors. Spar Urethane. This type of finish can significantly outlast varnish alone, but unlike a two-part polyurethane finish, it needs frequent recoating. Most likely the clear sealer or polyurethane will end up peeling and flaking off the stain. I would use a marine grade spar. 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