99 Varnish is a hard, transparent topcoat that we use to coat wood. 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. Polyurethane is a term used when isocynates are included in the product. 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. I would use a marine grade spar. Marine Spar Varnish. Selecting a Varnish 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. Unlike polyurethane, varnish is designed for outdoor projects and is not typically used for indoor surfaces such as a hardwood floor. Many marine varnishes are made with phenolic or polyurethane resin and tung oil because these provide the best resistance to water. Then there are different grades of spar varnish. Oil-based polyurethane is a highly durable finish, but it is also easy to apply. It creates a finish that looks shiny … Because of the higher ratio of solids, varnish is less susceptible to ultraviolet light damage. Polyurethane is a water- or oil-based plastic resin used for coating wood or as a wood finish. 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. Water-based spar urethane has easy cleanup, less fumes and dries in a short time period. Without UV protection, varnishes and wood quickly break down and fail. Some varnishes may even contain polyurethane. There are many clear wood finishes on today’s market. Marine (boat) varnish is spar varnish with ultraviolet-light absorbers added to resist penetration by UV rays. Varnish is typically a glossy finish, but flattening agents can be added. 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 . 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. Reply. It has a high degree of heat resistance, as well. Here's the trade-off. Take a bristle or preferable an ox hair brush, and brush the varnish on brushing in one direction going from dry to wet. Like polyurethane, Varnish is a curing finish. The other major distinction to look for in a varnish is the use that it is created for. Traditional Varnish and Polyurethane Toxicity Issues. 03:09PM | 04/08/03. Varnish, whether it contains alkyd or polyurethane resin -- or a combination -- is an example of a curing finish. 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. Can i just apply a very thin coat of Marine Spar varnish over the door without lightly sanding down the old varnish? Behlen Rockhard, Pratt & Lambert 38, McCloskey Heirloom, Ronan Quick Rubbing Varnish. 5 Shares. This gives chemical bonds that are superior for chemical & water resistance. You may also think of polyurethane as urethane, but they are actually two different components. This article compares the two in terms of pros and cons, application and equipment, and maintenance and clean-up. It has natural UV protecting properties. Piffin. Polyurethane vs. Varnish. In the case of air drying polyurethane varnishes the vegetable oil is reacted with isocynates & polyols instead of the phthalates & polyols. Member Since: 11/06/02 ... polyurethane vs. tung oil. 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. Spar Urethane. It is resistant to heat, chemicals, and wear and tear such as scratches. As a woodworker, you will come across situations regularly where you have to apply finish to wooden surfaces. Because of its composition it is can allow wooden surfaces to maintain their flexibility. Be sure to stir well when using these flattening agents. With polyurethane varnish, you get a clear and hard finish that comes in gloss, satin, or matte. Spar varnish, sometimes referred to as marine varnish is created specifically for outdoor use. Many woodworkers turn to oil-based polyurethane because it is the more durable out of the two options. 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. Traditional varnish (sometimes called Spar Varnish or Marine Varnish) is a resin in an oil base with solvents. 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. Marine spar varnish and exterior polyurethane finishes usually soak into the wood a little bit, but mainly build up on the surface. 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. Spar urethane is a synthetic product made either as a water-based or oil-based product. ... Buy two quarts of Marine varnish one gloss and the other the sheen of your choice. It was sanded, stained and finished with Marine Spar Varnish. Epoxy is, however, prone to UV damage, so the overcoat of varnish provides essential UV protection. Great job. Most varnish is created for indoor use, where the wood and the varnish on it are protected from weather and ultra-violet light. 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. It comes in three shades; Cetol Marine, Cetol Marine Light, and Cetol Marine Teak. 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. I am building a surround for a large soaking tub. Two of the most popular are polyurethane varnish and tung oil stain. ... Varnish vs Polyurethane -Wood Finish Pros & Cons. Pin 1. But, to my eye, this looks almost as nice as varnish. 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. There are plenty of products that are truely varnish that don't have polyurethane as an ingredient. 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. 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”. Regular polyurethane and varnish contain little, if any, UV blocking additives, and that alone makes them a poor choice for exterior application. Blog Marcus Gatley. Lowes sells a Cabot brand marine grade spar that is pretty good but the best would be Epifanes. Spar urethane vs. polyurethane can be a difficult debate, but polyurethane typically wins when it comes to indoor applications. Spar varnish must be reapplied periodically as it will chip, flake or chalk off over time. on Jun 6, 2017. 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. 99 - $119.99 $ 119 . 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 Most likely the clear sealer or polyurethane will end up peeling and flaking off the stain. Top coating polyurethane with marine varnish on exterior doors. Polyurethane Varnish Polyurethane Clear Finish (Amazon) Polyurethane varnish creates a tough surface once cured. Polyurethane vs Urethane vs Shellac. Shop a huge collection of marine varnish vs polyurethane for sale. Get marine varnish vs polyurethane! Tweet. Last but not least, every spar varnish needs to protect itself and the underlying wood from the sun. The idea here is that the epoxy adheres better than varnish and is less likely to separate from the wood. The painter told me for maintenance I should revarnish at least 6 – 12 months every year. Spar marine varnish is a natural oil based product that is designed to protect wood. The ravages of time and use of a piece of furniture can be limited by a durable top or finish coat. While polyurethane is water- or oil-based plastic resin, varnish is older and made from resins, oils, and solvents. Share 4. The drying mechanism is identical however Polyurethane varnish is highly durable. Susan Rhoades. Polyurethane: Polyurethane is a finish/sealant that has a very similar application and appearance to varnish, and therefore the two are often used interchangeably. It is an elastic, durable and easily processable substance, well suited for wire and cable coatings, engine tubing, drive belts, hydraulic hoses and … They are very similar and some people even use the phrases interchangeably. We use it on wood that will receive much wear and tear like flooring. Marine spar varnish with UV protection. Oil-based spar urethane requires several hours between coats. Purchasing one with maximum UV (Ultra Violet Light) protection is important. Spar Urethane vs Polyurethane: Difference – Pros – Cons. Helpful. While polyurethane is a synthetic material, tung oil stain is organic and made from the pressed seed extract of the tung tree. This can be beneficial for wooden surfaces, as they will be able to bend and expand and contract as needed. Spar Varnish. Thermoplastic Polyurethane (TPU) Another polyurethane material great for use in the maritime industry is thermoplastic polyurethane, or TPU. 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