Hardwax Oil vs. Polyurethane (2024)

How does a polyurethane wood finish compare to a hardwax oil wood finishing product? Today we dive into the differences between the products.

Perhaps you're not familiar with them yet and want to read more about what a hardwax oil actually is.

As we compare the differences, the following topics will be covered:

  • Colors
  • VOC Levels
  • Number of Coats Required
  • Protection
  • Repairability
  • Cleaning
  • Maintenance

Film build – Aesthetic Appearance

Hardwax oil

Hardwax oil finishes do not building up a layer of film on the surface. This allows hardwax oil finished wood to keep a very natural finished wood surface without obscuring the touch and visibility of the grain. The sheen of hardwax oil is typically matte, with some products able to achieve increased sheen.

Polyurethane

A polyurethane finish builds up multiple layers on top of the wood surface. This results in a synthetic/plastic-like film. The layers of film refract light and gives a shiny or glossy appearance. Polyurethanes come in varying sheen levels including matte, however due to build up, matte polyurethanes appear different than hardwax oils.

Conclusion

Subjective. This category depends on the look you are trying to achieve. Hardwax oils are a great option if you are looking for a matte finish that keeps both the natural look and feel of the wood. Polyurethanes are great if you want an increased sheen and prefer less texture to the floor.

The trend in recent years is a natural-appearing finish that complements the character of the wood. Preference for matte sheen finishes has been steadily increasing over the past few years.

Colors

Hardwax oil

The technology of hardwax oils allows pigment to be added directly to the product. This allows for the addition of color during the finishing process without adding an additional step in the process, saving a significant amount of time. Manufacturer approved stains, or “pre-colors”, may also be used prior to finishing with a colored hardwax oil, allowing for cerused looks and expanded creativity. Hardwax oils highlight the natural characteristics of the wood. If the surface is not prepped properly, colored oils can highlight imperfections in the surface preparation.

Polyurethane

When a polyurethane project requires adding color, this is typically achieved by staining the surface prior to applying the polyurethane. Stains typically require a skilled hand to apply due to their tendency to show lap marks. Staining also means an additional step and extra time in the finishing process.

Conclusion

Hardwax oils offer the advantage of applying color during the finishing process. This can save a significant amount of time and labor during the finishing stages, though it should be mentioned that prepping for hardwax oils requires proper sanding skills.

VOC Levels

Hardwax Oil

Many hardwax oil finishes have high solid content, meaning they contain less solvent to evaporate and therefore, less VOCs are emitted. Many contain small amounts while some contain 0% VOC levels.

Polyurethane

Polyurethanes use solvents or water as a carrier. Those that use solvents have higher levels while those that use water have inherently lower levels. VOC levels are regulated by legislation at both the federal and state level. Polyurethane VOC content can be as high as 550g/L and require ventilation and respirators. Some 0% VOC water-based polyurethanes are available.

Conclusion

Modern advances in technology have lessened the dependency on VOCs. This has led to the availability of low and 0% VOC options. VOCs impact the person applying them, the end-user, and the environment. Therefore, when choosing the amount of VOC you want in your finish, you need to keep all these factors in mind. Additionally, individuals with chemical sensitivities may be affected by VOC vapors and require the use of 0% VOC products.

Number of coats – simplicity of application

Hardwax Oil

Most hardwax oil wood finishes only require a single application, while some require additional applications.

Hardwax oil wood finishes are typically very simple and easy to apply. Most hardwax oil wood finish products get applied, worked in, and finished with an electric buffing tool or are ‘hand-rubbed” on smaller wood finishing projects. Excess oil is typically completely removed with absorbing rags. So, one does not ever need to worry about hairs, dirt, and debris in the finish.

Polyurethane

Most polyurethane wood finishes require a minimum of 3 coats as a recommended wood protection system.

All polyurethanes require multiple steps to complete the finishing stage. Most polyurethanes require good abrasion between applications to get proper adhesion and to achieve a smooth substrate free of debris and dust in the finish. They also require a sterile environment and “craftsman-like” application skills to achieve a professionally appearing finish that is free of dirt and debris in the finish coat.

Conclusion

The ease of application and time savings provided by hardwax oil wood finishes are apparent when compared against polyurethane.

Protection

Hardwax oil

The protection in hardwax oil results from the oil and wax formula in the product. Due to the wax, liquids bead up on the surface and make for easy cleaning. Most hardwax oils will harden the surface slightly, however, the final hardness of the finished surface is dependent on the wood species used. Due to the low-sheen, light scratches on the surface are not easily visible.

Hardwax oil wood finishes allow more stability when working with wider planks, particularly for flooring. The water vapor transmission is more controlled and consistent due to the absence of the film build like with a polyurethane finish. In other words, the wood acclimates easier and is more controlled to variations in relative humidity (RH) with less undesirable movement.

Polyurethane

Polyurethane achieves its protection through building up layers of synthetic/plastic material above the wood surface. Because of the thick film build, polyurethane takes longer to be affected by chemicals and liquids. Light scratches on the surface are accented by light refracting in the build layer.

The thick film created by polyurethane may pose some issues when applied to a wood surface like wide plank flooring or a tabletop in environments that are exposed to widely varying relative humidity levels. When just one side of the wood surface is finished with a thick film, if there is a significant fluctuation in RH, often the exposed wood substrate may experience undesirable movement like cupping or crowning. The finished side of that wood substrate controls the transmission of moisture vapor more than the unfinished side or less thick finished side, resulting in undesirable wood movement.

Conclusion

Both finishes allow liquids to bead up for easy cleaning. Polyurethane will provide protection against liquids and chemicals longer than hardwax oil finishes, however, this is accomplished using aplastic film on the surfacewhichwill show scratches much more easily than hardwax oil. Next, we will discuss repairability.

Repairability

Hardwax Oil

Hardwax oil is accepted into the wood and once the wood accepts it, no additional product is accepted. This technology allows for localized spot repair. Areas or spots can be fixed by repairing the area and re-introducing oil to just that area. The wood will only take the oil as needed, leaving a consistent look across the floor. Depending on the repair process, the sheen may be slightly different until the surface has fully cured and been used and cleaned a few times.

Polyurethane

Repairing wear or damage on a polyurethane finished wood substrate requires a lot of time to apply the multiple layers and a significant amount of skill to blend or feather the finish in with the surrounding finish. If the floor was stained it adds another level of complexity. Often, it is so difficult to spot repair polyurethane that the entire surface needs to be re-sanded and re-finished.

Conclusion

Hardwax oil allows for significantly easier repairs compared to polyurethane finish, which often requires a complete re-sand and re-finish.

Cleaning

Hardwax Oil

Most manufacturers recommend general cleaning by dusting, vacuuming, and damp cleaning using water or a cleaning solution. Each manufacturer recommends a specific cleaner.Using the wrong cleaner may affect the protection and performance of the applied hardwax oil finish, cutting down on the life of the surface.

Many recommended cleaners may contain some type of oil in the soap formulation to nourish the oiled substrate during the cleaning.

Polyurethane

Most polyurethane manufactures also recommend general cleaning by dusting, vacuuming, and damp cleaning using water or a cleaning solution. The use of specific cleaners is less important for a polyurethane floor.

Conclusion

Ifyou are using approved cleaners, care for both finishes are very similar.

Maintenance

Hardwax Oil

Since there is no film build with a hardwax oiled wood finish, some maintenance is required to maintain the protection and beauty of the oiled wood substrate. Maintenance frequency will depend on use, climate, and cleaning process. The periodic reoiling (aka refreshing or renewing), is easy to perform and does typically not require abrasion to be performed during that process. Simply apply the recommended maintenance product to the needed areas. This reoiling may be performed in localized areas without the need to refresh or renew the entire floor, and rugs and furniture do not need to be removed. Simply work around it.

Most surface scratches are resolved during maintenance. If maintenance is not done from time to time, the aesthetic and protection will be affected.

Polyurethane

Periodically, depending on use and cleaning process, a polyurethane finished wood surface will require a "buff and coat." This involves the removal of all furniture, abrasion of the entire surface, and a coat of more polyurethane. Abrading the surface introduces dust into the environment and increases the risk of surface contamination in the applied maintenance coat.

The "buff and coat" process will usually highlight any surface scratches in the surface. Again, if maintenance is not done from time to time, the aesthetic and protection will be affected.

Conclusion

While both products will require maintenance, hardwax oil may require it slightly more frequent than a polyurethane, however, hardwax oil maintenance is much easier to perform and can be done quicker than polyurethane maintenance. The consideration should be whether minor (no sanding, no furniture removal) maintenance at a slightly more frequent interval or major maintenance (abrasion, dust, and furniture removal) less frequently is preferred.

Hardwax Oil vs. Polyurethane (2024)

FAQs

Can I put polyurethane over hard wax oil? ›

In summation, just make sure the oil you applied to your piece was a drying oil. Then make sure that it has had the time to fully dry/cure (days to weeks depending on heat & humidity). After that, feel free to add a top coat of lacquer or polyurethane to it.

How durable is hard wax oil finish? ›

One major advantage of hardwax oil finishes is that when properly maintained, they can last a lifetime without needing to be sanded and refinished. When the surface begins to look dry or thirsty, maintenance is necessary. Maintenance typically makes the surface look freshly finished, without requiring sanding.

Is 2 coats of polyurethane enough for floors? ›

How Many Coats of Water-Based Polyurethane Coating Do I Need? You need at least five to six coats of polyurethane to reach a smooth coating. Only apply three to four coats of water-based poly for a less durable surface. It will help you achieve a good finish, but will not be as smooth and clear as an oil-based finish.

Do you need to sand between coats of hard wax oil? ›

HARDWAX OIL is a blend of natural oils and waxes, offering exceptional durability and resistance to wear on wood floors. Provides a water repellent, treadfast finish. Easy application with no sanding between coats, and easy to maintain and renovate when required.

Is it better to use wax or polyurethane? ›

Hardwax oils are a great option if you are looking for a matte finish that keeps both the natural look and feel of the wood. Polyurethanes are great if you want an increased sheen and prefer less texture to the floor. The trend in recent years is a natural-appearing finish that complements the character of the wood.

What happens if you put polyurethane over wax? ›

If you've waxed your furniture and then decide you'd prefer a poly finish, remove the wax with mineral spirits (in a well ventilated area) before apply a water based poly. Otherwise, the wax tends to repel the poly and it ruins the finish or may be more work down the road.

How many coats of hard wax oil? ›

Maximum 2 coats recommended. Apply at room temperature. Fiddes Hard Wax Oil is formulated for application directly, and does not require thinning. Stir contents thoroughly before and during use, and apply in a warm, well ventilated room.

Can you buff hardwax oil? ›

After drying, sand with 320 or 400 grit abrasive, wipe or vacuum the surface, brush or rag the next coat on, wait one minute, and then gently buff off the excess surface oil with a clean rag. If you leave it too long before buffing it can go tacky. If this happens apply another coat of oil and buff immediately.

Does hard wax oil seal wood? ›

If you're looking for a hardwax oil protector for your wooden floor, which is easy to use, leaves a lustrous finish and smooth to the touch; then the Osmo Polyx-Oil is the product for you.

How long do I have to wait to put a second coat of polyurethane on? ›

Water-based polyurethane requires at least two hours of dry time between coats, and you should only apply two coats in a day. It's important to remember that drying time is affected by temperature and humidity.

How many coats of oil based polyurethane should you put on a wood floor? ›

We recommend at least 2 coats of oil based polyurethane + a lacquer sealer coat as a minimum for hardwood flooring. Extra coats = extra protection, but only one coat of oil based polyurethane may be applied per day, as it needs 24 hours to dry before applying another coat.

What happens if you put a second coat of polyurethane too soon? ›

When you recoat after 2 hours you get a chemical bond between layers. If you let it go longer than that, you need to wait 24 hours so it's hard enough to sand and get a mechanical bond.

Can you wax the area twice with hard wax? ›

Hard wax leaves no sticky residue. It is much easier to clean up. Hard wax grabs shorter hair, eliminating the need to wax on the same area twice.

Can I use hard wax twice? ›

So, the wax you use at home can be re-used a few times, but only for one person.

Can you over heat hard wax? ›

If your wax is too hot, not hot enough, it can cause spreadability, setting, and consistency problems - and can even cause injury to clients! Our stripless film hard wax formula is also designed to be applied at a low melting point, so heating it up too much can even cause issues with effectiveness.

What is the downside of oil-based polyurethane? ›

Cons of Oil-Based Polyurethane

Longer dry times. Dents easier due to it softer finish. The odor is unbearable (respirator use is recommended). The floor darkens over time.

Should you wax over polyurethane? ›

Poly First, Then Wax

The rule of thumb is to apply poly then wax. Wax should always be the final topcoat applied to a piece of furniture.

Why do you need 3 coats of polyurethane? ›

For proper protection of the underlying wood, multiple coats are required. Oil-based finishes usually require fewer layers than water-based versions. This is because water-based polyurethane is thinner.

What happens if polyurethane is too shiny? ›

Another way to reduce the gloss level is to essentially scuffing the surface with fine scratches. This is sometimes called 'rubbing out' the finish. You can do it using various powdered abrasives, fine sandpaper, or scotch-brite pads and sanding with the grain of the wood.

How long should polyurethane CURE before buffing? ›

Generally speaking, the following estimates apply to most finishes: Hard wax oils: 1-7 days. Water-based finishes: 7-14 days. Oil-modified polyurethane: 30 days.

Do you shake wipe on polyurethane? ›

Polyurethane Dos & Don'ts

Shaking creates bubbles, which leave a rough, pitted surface. It's okay to shake wipe-on polys, however. Thin the first coat. Thinning doesn't improve adhesion, and you'll have to apply more coats and use more solvent.

What are the disadvantages of hardwax oil? ›

The downsides are that the finish is relatively easy to scratch and the coating can grant the floor a bit unnatural, 'plastic' look. Penetrating oils soak into the core of the wood, enhance its grain and grant the floor a warmer, more natural appearance.

How much hardwax oil do I need? ›

Our Hardwax oil covers up to 40 m2 per liter for 1 layer, 1 can 250 ml covers 8-10m2 which is very unique.

Should hard wax be applied thick? ›

Hard waxes are removed without a strip, so they need to be spread on the skin in thicker layers without losing their elasticity. This is extra important because you'll need to pull the wax out by the small portion unattached to the skin. At optimal temperature, hard wax usually has the consistency of thick paint.

Why is my hard wax not getting hard? ›

When wax won't set. For maximum hair removal, you need to ensure your wax has been set correctly. “If your hot wax is taking too long to set on warmer parts of the body or in humid weather, simply dampen a cotton pad with cold water and wipe over any gummy patches to cool and harden it instantly,” advises Rouillard.

How many times can you remelt hard wax? ›

You can reheat the hard wax beads and use them at a later date, but only if you keep them clean. You can also reheat the wax as often as you want, but keep in mind that, for hard waxes, the process takes from 30 to 40 minutes.

Why is my hard wax not spreading? ›

Apply enough pressure to the skin when applying hard wax

If you do not apply enough pressure, the hairs cannot fully adhere to the wax strip. Learning how to apply wax to the skin with the appropriate amount of pressure usually eliminates the problem of the wax not pulling out hair.

How often do you apply hard wax oil? ›

However, it is still necessary to re-apply a coat to flooring in private households every three to four years to ensure optimal protection. No sanding prior to recoating is required, but using an alkaline cleaner suitable for wood before the renovation is recommended.

Does hard wax oil darken wood? ›

The oils penetrate the surface of the wood and create a bond which stops flaking and peeling. We have had customers who have used oils on untreated slate, and clay tiles. However be aware that the oils will darken the surfaces and once applied is very difficult to remove.

Is hardwax oil waterproof? ›

Can I use Hardwax Oil in my bathroom? Absolutely, they are not only moisture repellent, they are water resistant.

How long does it take for 3 coats of polyurethane to cure? ›

Surfaces finished with oil-based polyurethanes can be used after around 4 days, but full cure normally takes 30 days. Even if the manufacturer's recommended time has passed, if you can still smell the polyurethane, it probably isn't dry.

How long will one coat of polyurethane last? ›

Depending on many factors, like your lifestyle and type of finish, polyurethane can last between three to six years. However, if you see damage on your floors, it may be time to reapply a fresh finish to your hardwood.

How many coats of Minwax polyurethane? ›

For maximum durability, we recommend 3 coats. Avoid heavy traffic and replacing of furniture for 72 hours after the final coat.

Is one coat of oil based polyurethane enough? ›

Oil-Based Polyurethane

There is the question of is one coat of polyurethane enough when it comes to an oil-based product, the answer to which is that you will require between three and four coats of this varnish for the best results.

Can you sleep in house after oil based polyurethane? ›

We recommend a minimum of 2 days of socks-only traffic for floors finished with oil polyurethane. The house is not inhabitable for a minimum of 2 days after the job is completed, and better to stay out for at least 5 as the fumes/off-gassing is not advisable to breathe in, even if there are other rooms to sleep in.

Can I apply multiple coats of polyurethane without sanding? ›

Conclusion. Sanding multiple times and applying more coats may take a lot of time and money. But, if you skip this process, the polyurethane coat will not cling to the previous coat, and the last coat will eventually peel off, causing you to buy more and start the project again.

How long does it take polyurethane to dry on one coat? ›

Protect your wood projects and get more done, faster, with Minwax One Coat Polyurethane Protective Finish. This crystal clear protective top coat dries in just two hours and lets you complete wood projects 3x faster without sacrificing durability.

Is there such a thing as too many coats of polyurethane? ›

Generally, more than 3 coats of poly doesn't do much good. It's really not needed nor recommended. Each additional coat needs to be buffed so you are kind of buffing off half of the previous layer. So 4 coats is more like 3.5 coats.

How long is too long for hard wax? ›

Although your hair needs to be at least a quarter inch to be waxed, hair that's too long can make waxing more complicated and painful. The American Academy of Dermatology (AAD) recommends trimming hair to three-quarters of an inch.

Can you pull hard wax in any direction? ›

When removing your strip, don't pull up or outward, keep as un-moved as possible. to avoid pulling the skin up away from the body, remove wax in the opposite direction of the hair growth, parallel to the skin.

How long do you leave hard wax on before removing? ›

Wait for the wax to harden (this usually takes about five minutes). Pull the wax off in the opposite direction of hair growth. Repeat on all desired areas.

How long does hard wax oil take to cure? ›

Dry and Cure Times

This usually takes between 24-72 hours. Cure time is the amount of time it takes to cure completely. This may be less than a week for two-component hardwax oil products or up to a month for single-component products.

Why does my hard wax dry so fast? ›

Extremely cold rooms will have the wax drying too quickly unless your warmer is set to a slightly higher temperature to offset this. Same way with warm rooms, if your room is too warm then your wax may need to be at a slightly cooler temperature so that it can set and dry properly once applied on the skin.

Is hard wax more effective? ›

There are two different types: soft wax and hard wax. Although both do a good job of removing hair from the follicle, hard wax is better for smaller, more sensitive areas like your bikini line. Soft wax, on the other hand, is a better option for larger areas like your legs.

What temperature should hard wax be set at? ›

Begin by heating the wax in a wax warmer with an adjustable temperature control. It is best to heat the wax on the highest temperature. After 15 minutes or more, turn the temperature down to a cool working temperature, which, for hard wax, is about 130 degrees Fahrenheit.

Should you use baby powder with hard wax? ›

Should I use baby powder before waxing? A sprinkling of baby powder after cleaning and oiling the skin will help to soak up any excess oils and help the wax adhere to the hair. If you're concerned you've used too much oil, this is also a good tip. Only use baby powder before your waxing treatment.

How do you know when hard wax is ready? ›

Wax should be thin enough to drip but not dripping too quickly. Wax dripping completely off the wax stick very quickly is too thin. Wax that doesn't drip off the wax stick at all or very slowly is too thick. Wax that has thick ribbons when stirred and drips off the wax stick in beautiful thick ribbons is just right.

How long should oil dry before applying polyurethane? ›

Varathane Oil-Based Wood Stain: stain will dry in 2-4 hours, allow you to recoat after 2 hours if needed. However, you need to allow 8 hours of drying time before using an oil-based polyurethane and 24 hours before using a water-based polyurethane.

Is hard wax oil waterproof? ›

Can I use Hardwax Oil in my bathroom? Absolutely, they are not only moisture repellent, they are water resistant.

What kind of wax can I use on polyurethane? ›

Yes, Feed-N-Wax is compatible with all cured (fully dry) clear coat finishes including; tung oil finish, polyurethane finish, varnish, and lacquer wood finishes. Feed-N-Wax adds a protective coating of beeswax and carnauba wax that helps prolong the life of the finish.

How long does 2 coats of polyurethane take to dry? ›

Water-based polyurethane requires at least two hours of dry time between coats, and you should only apply two coats in a day. It's important to remember that drying time is affected by temperature and humidity.

Do you buff the last coat of polyurethane? ›

Put on the polish

Apply only one thin coat. Then, remove any dust nibs with 1,500-grit sandpaper or a piece of brown paper bag. Finally, using a soft cotton rag or polishing pad, buff the finish to a high shine using automotive paste wax, photo below, which has fine abrasives that polish the finish even further.

How many coats of hard wax? ›

How many coats of Hard Wax Oil do I need? Under normal circ*mstances 2 thin coats is all that is required. Anything more than this will result in over application and the coating will be weaker not stronger.

What are the disadvantages of Hard Wax Oil? ›

The downsides are that the finish is relatively easy to scratch and the coating can grant the floor a bit unnatural, 'plastic' look. Penetrating oils soak into the core of the wood, enhance its grain and grant the floor a warmer, more natural appearance.

How long does it take for Hard Wax Oil to dry? ›

Apply THINLY using Fiddes Floor Oil Brush or a good quality bristle or synthetic brush, and lay EVENLY, following the direction of the grain. Leave to dry 4-6 hours in warm, dry well ventilated conditions, or preferably overnight. Apply as first coat, THINLY, allowing good ventilation.

What is the best thing to apply polyurethane with? ›

Apply oil-based poly using a fine-bristled brush (natural or synthetic bristles) or a foam brush. Avoid inexpensive bristle brushes, as these tend to leave obvious brush strokes. Foam brushes are inexpensive (and disposable) and work well for most flat surfaces.

How do you make polyurethane smooth and shiny? ›

Buffing really does make it easy to get superb results on wood finished with polyurethane, even waterbased. That's what you'll learn about here. Buffing works beautifully, even if you've applied a finish that's not too smooth to begin with.

What is the best thing to use to apply polyurethane? ›

A foam brush is my favorite way to apply both oil and water based polyurethane vs a standard brush or wipe on poly because it's quick and easy to use, provides great coverage, and does not leave brush strokes.

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