Polyurethane vs spar urethane - Polyurethane can be used over enamel paint, which often provides a harder finish than latex-based paints. For best results enamel paint should be allowed to dry for three to seven ...

 
polyuethane is harder than varnishand in most cases more durable,,,time are a changing, the key for boats is UV portection,,just puchased 1 gallon of VARATHANE brand spar urathane for47 bucks ,outdoor with UV and weather protection oilbased clear gloss,in 3 to 5 years I will reapplie,longliner. longliner45, Sep 6, 2006.. 1000 into usd

Feb 11, 2020 · Often used to finish hardwood floors, the newer water-based oil-modified polyurethane lends a more robust level of protection than traditional water-based poly. However, any water-based ... Polyurethane vs. Polycrylic. Water-based polyurethane is popular because of its low odor and low toxicity. It goes on clear without adding a slight color that oil-based versions can, and it dries much faster. As with shellac, water-based polyurethane won't hold up well to heat and chemicals. It's good for bookcases, desks, side tables and ... Mar 11, 2010 · Several boutique makers still use poly. Polyurethane allows a higher gloss, better color retention and a more durable finish over nitrocellulose lacquer. Poly can be sprayed thin like nitro and being a plastic, it is porous and does "breathe." But guitar companies take advantage of the ability to quick, heavy spray guitars and buff them out. It dries faster, as well. However, it’s not as resistant to high temperatures or water, and it’s more susceptible to scratches than oil-based polyurethane. Polycrylic is a water-based product ...Oct 3, 2023 · 5. TotalBoat 482869 Lust Marine Varnish. TotalBoat is a household name in the marine industry as far as paints and varnishes go. This is the brand’s best offering if we’re going to consider fundamental factors like durability, shine, and value for money. Feb 16, 2023 · Common brush widths are 1 inch, 1.5 inches, 2 inches, 2.5 inches, 3 inches, 3.5 inches, and 4 inches. Brushes that are 2 inches or smaller in width are ideal for applying polyurethane in tight ... Dec 4, 2022 · While both spar varnish and spar urethane are similar products with similar consistency, one difference that sets the two aside is the fact that spar urethane takes longer than spar varnish to set. A conventional varnish sets faster in comparison to a spar varnish. Another difference includes that spar urethane has high resin contents which it ... Jul 26, 2022 ... Oil Based vs Water Based Polyurethane | Which Is A better Wood Floor Finish?| 2023. Lumberjack Hardwood Supply•12K views · 7:54. Go to channel ...Spar Urethane vs. Polyurethane. While spar urethane and polyurethane have very similar ingredients, the major difference is the ratio. With spar urethane, you …Minwax® Helmsman® Spar Urethane is specially formulated as a protective clear finish for exterior or interior wood exposed to sunlight, water, or temperature changes. Contains UV blockers to reduce the sun's graying and fading effects. Forms a protective barrier against rain and moisture. Special oils allow the finish to expand and contract ... Typically, a coat of polyurethane dries within 24 hours. For example, if polyurethane is applied to hard wood flooring, it is okay for a person to walk on the floor at the 24-hour ...Jan 25, 2017 ... Comments2 ; Spar Urethane Vs Polyurethane. Toolz Guru · 19K views ; How to Stain Wood Like a PRO - 4 Simple Steps! Biscuit Tree Woodworks · 1.4M ...No, you can’t, for the same reason why you can’t top coat anything over waxed shellac. Urethane-based sealants (such as Spar Urethane) will eventually peel right off a waxed Shellac surface. But, you can apply a non-penetrating Spar Urethane sealer over dewaxed shellac. And, if you stick to using a clear coating Spar Urethane, it won’t ...Consider these applications when choosing between urethane vs polyurethane adhesive. 4. Thermal Insulation . Low-density rigid polyurethane is used to insulate walls, and carpet underlay is also made of recycled polyurethane scrap. 5. Flooring . Protective polyurethane is resistant to abrasion and spills and is used as a protective coating. Spar urethane offers superior water resistance and UV protection, helping to prevent your cedar from warping, cracking, or fading in the sun. Oil-Based Polyurethane: The Classic Choice. Oil-based polyurethane is a classic choice for finishing cedar. It offers a rich, warm finish that can bring out the natural beauty of the wood. Plus, oil-based polyurethane is …Varathane exterior polyurethane protects outdoor wood projects and applications including fences, railings, patio furniture and house trim; not intended for decks. Covers up to 150 sq. ft., apply at least 3 coats on surfaces. Semi-gloss sheen adds a subtle shine to exterior wood surfaces in a rich golden glow that deepens over time.What you need to do is consider adding some type of finish to the door so that it keeps its aesthetic appeal. The two main choices when it comes to finishes for doors are polyurethane and marine finish. Polyurethane, available in both oil and water-based options, is similar to liquid plastic, and it does provide some protection for wood.Polyurethane can be used over enamel paint, which often provides a harder finish than latex-based paints. For best results enamel paint should be allowed to dry for three to seven ...Dec 4, 2022 · While both spar varnish and spar urethane are similar products with similar consistency, one difference that sets the two aside is the fact that spar urethane takes longer than spar varnish to set. A conventional varnish sets faster in comparison to a spar varnish. Another difference includes that spar urethane has high resin contents which it ... Varnish is thinner and requires multiple layers. Polyurethane can be water or oil-based, used mostly for indoor applications. Polyurethane is more durable and more expensive. Read on to learn more about varnish and polyurethane, so you will know which is best for your boat, furniture, or deck.The main difference between polyurethane and spar urethane is the amount of oil. Spar urethane has more oil, which makes it more flexible and resistant to cracking in outdoor conditions. Polyurethane has less oil, giving it a harder and stiffer finish. There are a few other differences, such as UV-blocking additives, the level of fumes, and ...Sep 5, 2020 ... Polyurethane, varnish, shellac, and lacquer are popular wood finishes. We walk you through each product, and how to choose which finisher is ...The choice between polyurethane and spar varnish depends on your project requirements and personal preferences. Lacquer is a good choice if you are looking for a fast-drying finish that provides a high-gloss appearance. On the other hand, if you want a durable and long-lasting finish that can withstand wear and tear, polyurethane is a …The main difference between polyurethane and spar urethane is the amount of oil. Spar urethane has more oil, which makes it more flexible and resistant to cracking in outdoor conditions. Polyurethane has less oil, giving it a harder and stiffer finish. There are a few other differences, such as UV-blocking additives, the level of fumes, and ...Polyurethane allows a higher gloss, better color retention and a more durable finish over nitrocellulose lacquer. Poly can be sprayed thin like nitro and being a plastic, it is porous and does "breathe." But guitar companies take advantage of the ability to quick, heavy spray guitars and buff them out.I’ve been reading up a lot of polycrylic vs polyurethane and I’m honestly a little scared to use either. I am leaning towards polycrylic. From what I am reading online, polyurethane yellows over time. ... Edit: I would be willing to try the Spar Urethane UV protection option linked in the other comment. Never used that one before but it is ...The key advantages of Spar Urethane are the flexibility and UV resistance (similar to Varnish) which makes it a better choice compared to polyurethane when it comes to exterior uses. Polyurethane may be a …Applicator Method. Spar urethane is easier to apply than spar varnish as it’s more flexible and has a faster dry time, allowing you to apply multiple coats faster. Spar varnish is harder to apply as it can leave brush marks behind and has a longer dry time. Tony is a professional painter and an author of DIY Geeks.Spar Urethane vs Polyurethane. Now it’s time to take a look at how these spar urethane and polyurethane compare across a range of features. Oil. Oil content is probably the most significant difference between spar urethane and polyurethane. The amount of oil in spar urethane is much higher, which makes it softer and more pliable. Spar Urethane vs Polyurethane - A Feature Comparison. Now that we understand the basics of spar urethane and polyurethane, let’s compare them in terms of various features: 1. Ease of Application. Both spar urethane and polyurethane can be applied in a similar manner. The application process involves scuffing the surface, …McCloskey Man O' War Marine Spar Varnish #80-6505; McCloskey Man O' War Marine Spar Varnish #80-6535; McCloskey Man O' War Marine Spar Varnish #80-7505; McCloskey Man O' War Marine Spar Varnish Spray #80-7555Minwax® Helmsman Spar Urethane is a clear finish that offers protection for interior or exterior wood exposed to sunlight, water and temperature changes.Spar Urethane vs. Polyurethane. While spar urethane and polyurethane have very similar ingredients, the major difference is the ratio. With spar urethane, you …Spar urethane and polyurethane are both protective finishes for wood, but they differ in durability and environmental resistance. Spar urethane provides enhanced protection against outdoor elements, UV radiation, and moisture. Polyurethane is versatile for both interior and exterior projects, requiring additional UV protection if used outdoors.Well-layered spar varnish will last for around 8 to 10 years. On the other hand, spar urethane coats will last for around 10 to 15 years or even more with ...The main difference between polyurethane and spar urethane is the amount of oil. Spar urethane has more oil, which makes it more flexible and resistant to cracking in outdoor conditions. Polyurethane has less oil, giving it a harder and stiffer finish. There are a few other differences, such as UV-blocking additives, the level of fumes, and ...5. Spar urethane yellowing. We concede this isn’t the most prominent issue with spar urethane, but it still happens. Being an oil-based finish, it is not uncommon that surfaces with spar varnish would develop a yellowish hue with time. In some cases, the cover takes an orange-like tan.Varathane exterior polyurethane protects outdoor wood projects and applications including fences, railings, patio furniture and house trim; not intended for decks. Covers up to 150 sq. ft., apply at least 3 coats on surfaces. Semi-gloss sheen adds a subtle shine to exterior wood surfaces in a rich golden glow that deepens over time.Spar urethane dries much faster than polyurethane, so if you want to finish projects faster, spar urethane is your go-to. However, if you are still a beginner, or want to be as meticulous as you want in your …Afterward, both sides declared victory. US presidential administrations once used television news programs to explain their agenda and highlight what could be expected from the Whi...Aug 27, 2023 · Water-based polyurethane tends to be less durable than oil-based products. Water-based polyurethane scratches and dents easily. Oil-based polyurethane coatings provide excellent abrasion and scratch resistance. This makes them a good choice for wood floors or for any application such as cabinets, railings, or countertops where durability is ... Jul 14, 2019 ... Anything "urethane" isn't going to do well in the UV rays outside. Should you want to stay with a spar varnish, any of the true spar varnishes ( ...Jul 26, 2022 ... Oil Based vs Water Based Polyurethane | Which Is A better Wood Floor Finish?| 2023. Lumberjack Hardwood Supply•12K views · 7:54. Go to channel ...Spar Urethane Vs Polyurethane. When deciding on what to choose between spar urethane and polyurethane for your wooden surfaces, you will have to consider a few …5. Spar urethane yellowing. We concede this isn’t the most prominent issue with spar urethane, but it still happens. Being an oil-based finish, it is not uncommon that surfaces with spar varnish would develop a yellowish hue with time. In some cases, the cover takes an orange-like tan.On the other hand, spar urethane is stronger of the two, and it will coat square feet per gallon, while polyurethane will stick with more problem on the surfaces. Polyurethane …When deciding between Spar Urethane and Polyurethane for your woodworking project, consider the unique qualities of each. Spar Urethane is known for its UV protection, making it ideal for outdoor use. On the other hand, Polyurethane offers greater resistance to abrasion and chemicals. Think of it as a wood hardener compared with stabilizer.Can I Use Spar Urethane over Polyurethane? No, you should not use spar urethane on top of polyurethane. Both are varnish-based, although they use different ...Polyurethane does not have a melting point because it is a thermosetting polymer, so when it is made, it becomes irreversibly hard. When exposed to extreme heat, polyurethane ignit...The main difference between polyurethane and spar urethane is the amount of oil. Spar urethane has more oil, which makes it more flexible and resistant to cracking in outdoor conditions. Polyurethane has less oil, giving it a harder and stiffer finish. There are a few other differences, such as UV-blocking additives, the level of fumes, and ...It dries faster, as well. However, it’s not as resistant to high temperatures or water, and it’s more susceptible to scratches than oil-based polyurethane. Polycrylic is a water-based product ...Here’s why. First off, the difference between traditional varnishes and polyurethanes is that the former uses natural oils and resins and the latter uses at least some synthethetic components. However, they are ALL still varnish. Spar varnishes, whether natural or poly’, are formulated for extra flexibility.Sep 22, 2008 ... These varnishes are usually used on interior surfaces where water resistance isn't an issue. Some rod builders successfully use these formulas ...Minwax® Helmsman Spar Urethane is a clear finish that offers protection for interior or exterior wood exposed to sunlight, water and temperature changes.Spar Urethane vs. Polyurethane. While spar urethane and polyurethane have very similar ingredients, the major difference is the ratio. With spar urethane, you …5. Spar urethane yellowing. We concede this isn’t the most prominent issue with spar urethane, but it still happens. Being an oil-based finish, it is not uncommon that surfaces with spar varnish would develop a yellowish hue with time. In some cases, the cover takes an orange-like tan.Aug 8, 2021 ... Varathane spar urethane vs Minwax Helsman spar urathane wood protector ... Polyurethane vs Varnish vs Lacquer. SawsHub DIY Woodworking Tips•42K ...Urethane vs Polyurethane: What is The Difference? Furniture, bedding, flooring, and even the clothes you wear: polyurethane and urethane are compounds found in many things we use every day. The two terms are often used interchangeably, and both compounds are used in the construction of products at different stages of production to …Jan 11, 2020 · Learn the differences between spar urethane and polyurethane, two popular types of finish for woodworking projects. Find out the advantages and disadvantages of each product based on oil content, dry time, application method, and environmental impact. The main difference between spar urethane and polyurethane is their resistance to environmental elements; spar urethane offers better moisture and UV …Varathane Spar Urethane (2024) Helmsman Spar Urethane Vs. Varathane Spar Urethane (2024) Spar urethane is a long-lasting, self-leveling sealant for wood. It is a synthetic solution made of resins and solvents. The most popular kind of spar urethane is oil-based, but a water-based variant is also offered. Spar urethane has a ton of …Also, because it is more flexible and breathable, it's not a super hard finish like floor finishes. But floor finishes are also brittle and probably will peel, crack and chip if used on exterior wood. Being logs, I'd also recommend spraying. It's easier and will get in any cracks, pits, etc. I'm not positive, but there may also be spar ...Urethane-based sealants (such as Spar Urethane) will eventually peel right off a waxed Shellac surface. But, you can apply a non-penetrating Spar Urethane sealer over dewaxed shellac. And, if you stick to using a clear coating Spar Urethane, it won’t dull that Shellac gloss either. To Wrap Up, Here Are The 3 Key Takeaways From This Post… 1).Afterward, both sides declared victory. US presidential administrations once used television news programs to explain their agenda and highlight what could be expected from the Whi...The reality is that spar urethane is a better exterior finish and polyurethane is better for interior use. This is mainly due to the superior flexibility and durability of spar urethane. While polyurethane is more brittle and likely to flake off when the wood it has been applied to expands and contracts, when used in interior spaces, it produces an …Feb 11, 2022 · Spar urethane is a super flexible, highly water and UV-resistant seal that’s easy to apply and typical for outdoor protection. Polyurethane is a thermoset polymer with good tensile strength, exceptional chemical resistance, and a cost-friendly seal common for indoor protection. These two substances have different chemical compositions. Flexibility Generally, polyurethane is less flexible than spar urethane. As the outdoor wood surface will face explanation or contraction due to weather changes, …For over a century, Minwax has been synonymous with high-end wood finishes. The brand, founded in 1904, has a wide range of polyurethane and spar urethane products for both domestic and industrial use. Minwax offers aerosols, water-based finishes, oil-based stains, and the popular trademarked product, Polycrylic.The standard mixture is 1/3 Boiled Linseed Oil or Tung Oil, 1/3 thinner (mineral spirits, paint thinner, turpentine, naptha), and 1/3 varnish (poly, spar, etc..). Now the blend mentioned in Brian’s question involved …Polyurethane is very resistant to wear, scratches, stains, chemicals, and heat. Great for. Bar tops and wood counter tops. Desks, chairs, and even floors. Utility surfaces (just about anything in a wood shop) Any surface that will get a lot of traffic and action. Any surface in the kitchen that takes heat and chemicals.Stick to applying oil-based Spar Urethane over a Tung oil finish, and you’ll be good to go. 2). Sand The Surface Before Application. You should always lightly sand smooth surfaces, (with high 120-grit sandpaper), before a coat of Spar Urethane. This is so that you create a bit of grip for Spar Urethane to cling to.Mar 30, 2023 · Durability. The primary difference between spar urethane and Polycrylic is that spar urethane is more durable, providing superior protection against extreme temperatures, moisture, and UV damage. Spar urethane is the best choice for outdoor projects such as benches, planters, patio furniture, and indoor surfaces exposed to moisture, like window ... Varnish is thinner and requires multiple layers. Polyurethane can be water or oil-based, used mostly for indoor applications. Polyurethane is more durable and more expensive. Read on to learn more about varnish and polyurethane, so you will know which is best for your boat, furniture, or deck.Feb 11, 2020 · Often used to finish hardwood floors, the newer water-based oil-modified polyurethane lends a more robust level of protection than traditional water-based poly. However, any water-based ... Nov 5, 2018 ... In my experience, the urethanes tack more quickly than Epiphanes, which is the varnish I've been using. So it's more difficult to maintain a wet ...Jan 25, 2017 ... Comments2 ; Spar Urethane Vs Polyurethane. Toolz Guru · 19K views ; How to Stain Wood Like a PRO - 4 Simple Steps! Biscuit Tree Woodworks · 1.4M ...Also, because it is more flexible and breathable, it's not a super hard finish like floor finishes. But floor finishes are also brittle and probably will peel, crack and chip if used on exterior wood. Being logs, I'd also recommend spraying. It's easier and will get in any cracks, pits, etc. I'm not positive, but there may also be spar ...3. Apply a thin coat of HELMSMAN® Spar Urethane using a high quality natural bristle brush. On unfin-ished wood, apply sufficient material to seal open joints, edges and end-grain. 4. Let dry at least 4 hours, then sand entire surface lightly with very fine sandpaper (220 grit) to ensure an even finish and proper adhesion of additional coats. 5.It dries faster, as well. However, it’s not as resistant to high temperatures or water, and it’s more susceptible to scratches than oil-based polyurethane. Polycrylic is a water-based product ...Spray On Polyurethane VS Brush On Polyurethane. In the end, whether you choose brush-on or spray polyurethane comes down to your specific project and skills. If you’re on a budget or new to DIY projects, brush-on polyurethane is a great place to start. Take your time and apply 3 thin, even coats for best results. For larger projects or if you want a …Adding an extra layer of protection is an essential part to extend the lifespan of the material. Lacquer and polyurethane are the top-recommended products Expert Advice On Improvin...Adding an extra layer of protection is an essential part to extend the lifespan of the material. Lacquer and polyurethane are the top-recommended products Expert Advice On Improvin...When deciding between Spar Urethane and Polyurethane for your woodworking project, consider the unique qualities of each. Spar Urethane is known for its UV protection, making it ideal for outdoor use. On the other hand, Polyurethane offers greater resistance to abrasion and chemicals. Think of it as a wood hardener compared with stabilizer. Mar 29, 2021 ... How well does UV inhibiting Spar Urethane protect the purple in cedar? Please comment below on what you have found that works to protect ...Spar is a long-oil varnish, meaning a higher ratio of oil to resin. Regular old polyurethane is a short oil finish meaning it has a higher resin content. Higher resins are what you want for interior stuff - scuff and chemical resistance. High oils are what you want for exterior stuff to allow for wood movement as mentioned above.With this dedicated practice, the beautiful varnished finish will last for years. With the appropriate thinner, dilute the first coat 50%, the second coat 25%, the third coat 15%, and any additional coats anywhere from 0 to 7%. [If you used a wood sealer, thin the first coat 25%.] Do not thin your last one or two coats.Spar is a long-oil varnish, meaning a higher ratio of oil to resin. Regular old polyurethane is a short oil finish meaning it has a higher resin content. Higher resins are what you want for interior stuff - scuff and chemical resistance. High oils are what you want for exterior stuff to allow for wood movement as mentioned above.Oil content is probably the most significant difference between spar urethane and polyurethane. The amount of oil in spar urethane is much higher, which makes it softer and more pliable. The high oil content is …Apr 18, 2023 · Varnish vs. Polyurethane. Varnish is most commonly confused with polyurethane. But varnish is also different from shellac and lacquer. Shellac is a non-toxic finish that brings out the grain of lighter-colored wood, but it is not durable and does not protect a surface from moisture. Lacquer is a toxic and very durable finish that creates either ...

This is because spar urethane is a type of polyurethane coating that is very thick and must be sanded lightly between coats. A smooth finish can only be achieved by properly preparing the surface with sanding between coats. This helps to ensure that there are no bumps or imperfections in the finish. When sanding between coats, use a fine grit .... Nude best friends

polyurethane vs spar urethane

Spar urethane, of which Minwax Helmsman is a leading brand, is spar varnish that includes urethane plastic as one of its resins. It's the go-to material for any exterior woodwork that needs a clear finish, but because its high resin content gives it a yellowish hue, it isn't the best choice for interior furniture.Jul 10, 2017 ... Use spar varnish only for exterior wood. It's too soft for interior applications. Just use a good interior polyurethane. You can use the spar on ...Minwax® Water Based Helmsman® Indoor/Outdoor Spar Urethane. Minwax® Water Based Helmsman® Spar Urethane is specially formulated to protect wood against nature's toughest conditions. Water Based Helmsman® forms a protective barrier against rain and moisture and its special oils allow the finish to expand and contract with the wood as ...Jul 1, 2023 · Clarity: If you want the natural wood grain to be highlighted, spar urethane is the better choice. It tends to be more clear than polyurethane. UV protection: If you want your finish to have strong UV protection, spar urethane is the better choice. It is specifically formulated to withstand the harsh outdoor elements. Spar urethane finish cedar wood from extreme weather condition (rain, snow, temperature changes) Enhance the wood appearance by highlighting the wood grain. Spar urethane blocks UV rays in sunlight and avoid cedar wood from fading. Protects wood from insects and bugs attacks. Easy to apply with few coats.1. Durability: Well-layered spar varnish will last for around 8 to 10 years. On the other hand, spar urethane coats will last for around 10 to 15 years or even more with proper maintenance. In case of cracking or peeling varnish, make sure you sand the area and coat it a few times using a good quality spar varnish.Spar urethane offers superior water resistance and UV protection, helping to prevent your cedar from warping, cracking, or fading in the sun. Oil-Based Polyurethane: The Classic Choice. Oil-based polyurethane is a classic choice for finishing cedar. It offers a rich, warm finish that can bring out the natural beauty of the wood. Plus, oil-based polyurethane is …Colloquially, people use the term urethane to refer to a type of varnish, while the term Varathane refers to a brand of varnishes, sealers and similar products. Technically, uretha...McCloskey Man O' War Marine Spar Varnish #80-6505; McCloskey Man O' War Marine Spar Varnish #80-6535; McCloskey Man O' War Marine Spar Varnish #80-7505; McCloskey Man O' War Marine Spar Varnish Spray #80-7555Michael asks, "How do I apply polyurethane without getting bubbles?"I prefer a high quality bristle brush, though a sponge brush works pretty well and has the advantage of being di...Re: Spraying Urethane vs. Polyurethane ... urethane and polyurethanes are the same thing... within the bounds of, there are many different ...Varnish is thinner and requires multiple layers. Polyurethane can be water or oil-based, used mostly for indoor applications. Polyurethane is more durable and more expensive. Read on to learn more about varnish and polyurethane, so you will know which is best for your boat, furniture, or deck.Sep 5, 2020 ... Polyurethane, varnish, shellac, and lacquer are popular wood finishes. We walk you through each product, and how to choose which finisher is ...Depending on the quality of these varnishes, the price may vary. Yet, in general, the spar urethane coating will cost more than the polyurethane. Usually, you may need to spend around $40-$100 for 1 gallon of spar urethane. But, you will easily find polyurethane within $30-$70/1 gallon.Spar urethane and polyurethane are both protective finishes for wood, but they differ in durability and environmental resistance. Spar urethane provides enhanced protection against outdoor elements, UV radiation, and moisture. Polyurethane is versatile for both interior and exterior projects, requiring additional UV protection if used outdoors.Minwax® Water Based Helmsman® Indoor/Outdoor Spar Urethane. Minwax® Water Based Helmsman® Spar Urethane is specially formulated to protect wood against nature's toughest conditions. Water Based Helmsman® forms a protective barrier against rain and moisture and its special oils allow the finish to expand and contract with the wood as ... Conclusion. Varathane vs Minwax: Varathane is known for its high-quality products that provide a durable and long-lasting finish. Their finishes are water-based, which makes them environmentally friendly and easy to clean up. Varathane offers a wide range of finishes, including matte, satin, semi-gloss, and gloss, which makes it easy to achieve ...Varnish and polyurethane are exceptionally durable and offer similar amounts of protection when applied properly and allowed to cure. Polyurethane has the edge on resistance to abrasion, while varnish holds up a bit better to UV light and weather. Both are waterproof and repel mildew, rot, pests, and fungus.Applying a new mix of polyurethane on top of a pre-existing one always requires sanding. With time, wood develops imperfections and cracks that you need to sand down to improve the final look of the polyurethane finish. To get the smoothest result, use a 120-grit sandpaper. 2. Apply the First Layer..

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