{"id":8529,"date":"2020-12-27T14:18:21","date_gmt":"2020-12-27T14:18:21","guid":{"rendered":"https:\/\/resin-expert.com\/?p=8529"},"modified":"2023-04-06T14:11:15","modified_gmt":"2023-04-06T14:11:15","slug":"how-many-coats-of-polyurethane","status":"publish","type":"post","link":"https:\/\/resin-expert.com\/en\/guide\/how-many-coats-of-polyurethane","title":{"rendered":"How Many Coats of Polyurethane – Everything about Applying Poly"},"content":{"rendered":"

A polyurethane coating offers a durable and clear finish for all kinds of different wooden surfaces. The varnish is commonly used in countertops, flooring, and tables, offering a long-lasting result. Polyurethane is water-resistant and resistant to solvents, chemicals, abrasions, impact, and all kinds of other damage. A polyurethane finish doesn\u2019t just help to strengthen the wooden surface, but it also looks great. So, how many coats of polyurethane to add? And how exactly do you apply it? We will explore this topic in detail below.<\/strong><\/p>\n

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What is a Polyurethane Coating?<\/h2>\n

Polyurethane is a substance that can either be water-based or oil-based. Oil-based polyurethane has been around for longer, and it is a form of alkyd varnish which is combined with polyurethane resin.<\/p>\n

Alkyd is a substance found in basically any varnish or oil-based paint. By adding polyurethane resin to this, you get a much stronger and more resistant product. Thanks to the addition of polyurethane resin, this type of finish has excellent water, scratch, and heat resistance. Water-based polyurethane finishes are a combination of an acrylic resin with polyurethane. These coatings are not as strong as the oil-based version, but they do offer a number of favorable properties.<\/p>\n

There is another option available though. This is an oil0-modified water-based polyurethane. Basically, this substance offers the best of both worlds. It is quick to dry, safer to use with fewer chemicals, easy to clean while maintaining the durability of an oil-based product.<\/p>\n

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How many coats of polyurethane you will need to apply depends on the type of product you use, and what your specific requirements are. Each type of polyurethane has its advantages and disadvantages. The choice should be based on the specific project that you are doing.<\/strong><\/span><\/p><\/blockquote>\n

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Oil-Based Polyurethane<\/h3>\n

As mentioned above, oil-based polyurethane finishes are extremely strong and resistant to many influences when they are cured. These finishes are quite thick – something that influences how many coats of polyurethane you add. Oil-based products also contain rather a high level of VOCs – something that makes them less easy to find.<\/p>\n

Is one coat of polyurethane enough? For ideal results, you should use about three or four coats. You will also have to wait quite some time between coats, as this polyurethane takes longer to dry. No matter how many coats of polyurethane you apply, it will always be quite a time-consuming process when using an oil-based finish.<\/p>\n

Oil-based polyurethane finishes have a slight amber hue when dried,. This shows through more in lighter woods and adds more warmth to the color. Oil-based polyurethane varnishes can be cleaned up using mineral spirits.<\/strong><\/span><\/p><\/blockquote>\n

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Water-Based Polyurethane<\/h3>\n

If you are after a safer and more environmentally-friendly option, then a water-based polyurethane is best. This type of varnish emits a low number of VOCs. These products are also self-leveling and faster to dry. However many coats of polyurethane you add, the process will be much quicker with a water-based product.<\/p>\n

Even though this finish is much better to use and work with, it has its setbacks.<\/p>\n

The cured finish is less durable, and can even cause a lift in the grain of the wood. So, how many coats of polyurethane do you need?<\/p>\n

Because of the raise in the wood grain, water-based polyurethane products will need a couple of layers to achieve a smooth surface. The consistency of this varnish is also thinner and more liquid – meaning that more coats are required. When working with water-based polyurethane, four or five coats is probably best. Luckily, this type of finish is faster to dry. It doesn\u2019t matter how many coats of polyurethane you do choose to apply, the job becomes faster and easier.<\/p>\n

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When water-based polyurethane is still liquid, it has a milky type of color. However, when dry it is completely clear. This allows it to really highlight and enhance the natural wood color underneath. These finishes are much easier to clean up, and only need water and soap to do this. Water-based finishes also dont yellow as easily.<\/strong><\/span><\/p><\/blockquote>\n

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The Best Polyurethane Options<\/h2>\n

With so many different polyurethane products and finishes out there, finding the right one can be a challenge. We have chosen three of the best polyurethane products below, each one in a different category. These will ensure the highest quality finish available.<\/p>\n

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Best Oil-Based Product: MINWAX Fast-Drying Polyurethane<\/h3>\n

If you are after a polyurethane finish that provides the highest level of durability, then this option by Minwax is a great choice. This finish offers a long-lasting solution that looks great with its clear satin shine.<\/p>\n