Complete Guide to spraying Polyurethane

Polyurethane is a fantastic finish for a variety in DIY tasks. Many people feel intimidated making use of polyurethane since this type of material could pose problems. Once it is cured, polyurethane is durable, transparent, and provides an attractive finish on a variety of surfaces. Utilizing the polyurethane spray is always a great option because it is easy to apply and lets you achieve an excellent, even finish every time. If you’re considering using a polyurethane spray as a possible option for the next project, make sure to read the complete guide we have provided below.

Why should you choose polyurethane?

Polyurethane is already a difficult finish that is difficult to apply. If you opt to paint it with brushes and then apply it with a brush, the application process will only become more challenging. Spraying polyurethane can give you the most precise outcomes. If you paint polyurethane using brushes, you have an increased likelihood of creating bubbles on the polyurethane surface. It is also essential to be very careful when you are brushing because it is possible to leave marks on the surface. chance of leaving marks from the brush and bumps on the finish. It is also possible to trap moisture inside the polyurethane when you brush incorrectly, that can cause a cloudy finish. The choice to apply polyurethane spray will eliminate these problems. It lets you apply even coatings on difficult-to-access regions and oddly-shaped contours. Also, it eliminates the chance of things like marks from a brush or weird surface patterns. Spraying polyurethane requires several additional steps, and possibly more coatings than simply brushing it on. But the final product will be much better.

How do I spray Polyurethane?

If you spray polyurethane it gives you an even more polished finish in comparison to simply using it to brush it on. It is true that spraying polyurethane requires an additional technique. But don’t fret, as it is much easier to master as opposed to using brushes. Before you begin to spray you should keep the spray nozzle approximately 10 to 12 inches from the area you’re coating. This will help you achieve a smoother, more uniform coat, without scratches or paint buildups. As you begin to spray ensure that you maintain a consistent flow. Don’t stop at any point and this can cause an uneven surface that is hard to repair. Also, spray the entire surface the area before stopping.

One method for ensuring consistency is to begin spraying with the sprayer directed at the air before bringing it to a surface. So, you don’t get a missed patch and receive the same amount of polyurethane distributed over the object.

Be sure to maintain an untidy wrist when spraying. Moving it around can cause uneven waves and arcs instead of straight lines. This could result in an oddly covered surface with certain patches being more dense than others, and other areas being left unprotected. Be sure to ensure that you are moving in a straight line while spraying. In the event that you spray for too long in a single area this can lead to an accumulation of polyurethane which can cause drips or even runs.

In order to spray polyurethane and polyurethane, it’s essential to know what settings will work best for the areas of the project. A quality sprayer is flexible with a variety of settings that allow the user to switch between these settings when you spray various zones. For instance, a horizontal setting is ideal to allow spraying across and down objects such as table legs columns, pegs, or columns. Horizontal settings let you move the sprayer over large areas. The circular or middle settings are perfect for creating edges, contours, corners and more.

The best Aerosol Polyurethane 

MinWAX Polyurethane

Utilizing an aerosol spray can of polyurethane that is available in aerosol spray can be a great convenience. You can make use of the product spray over furniture or wood finishes, making DIY and home improvement projects much simpler to manage. When sprayed on wood, you will get an extremely long-lasting protective coating. It is sprayed on unfinished or finished wood surfaces and can be used over a range of different types of wood. It’s a versatile polyurethane spray. It’s not just a the perfect layer of long-lasting protection and protection, but it also improves the natural beauty of the wood beneath because of its shiny, clear finish.MINWAX Speed-Drying Polyurethane Aerosol

  • Fast drying and durability and beauty to wood surfaces, both finished and unfinished surfaces.
  • The hardest of protective coatings Long-lasting and durable finish
  • It is easy to put on, easy to maintain


  • Simple to utilize and spray
  • Offers a long-lasting finish
  • It is suitable for all kinds of wood surface
  • Offers a beautiful shining coating for wood
  • It offers a high degree of endurance and resistance


  • It is not appropriate to be used for spraying on smaller areas

The Best Water-Based Polyurethane:

RUST-OLEUM Varathane Ultimate Polyurethane

It is a durable and adaptable solution to any kind of project. Rust-Oleum is a well-known brand, has developed this finish that is scratch-resistant and resistant to yellowing. The finish is suitable for use for a variety of indoor use, such as doors, furniture, trims cabinets, and much more. This polyurethane is cured to give a clean satin finish , which helps increase the appeal of the wood under it. Due to its exceptional clarity it is a polyurethane could be sprayed over any kind of wood. It also comes with low in odor which makes it a more secure and better option for indoor use.

The Best Sprayer: 

GRACO Ultra Max Cordless Airless Handheld Paint Sprayer: GRACO Ultra Max Handheld Handheld Paint Sprayer

If you are planning to spray polyurethane and other polyurethane-based materials, you’ll require a high-quality sprayer to do the job right. This airless sprayer from Graco gives you the best convenience and user-friendliness. The first thing to note is that this is a cordlessand airless sprayer. This means you can make use of it wherever you want without worrying about power cords and plugs. However, this doesn’t mean that power or capacity are limitless. The sprayer is powered by an Dewalt XR lithium-ion battery system that lasts a long time and recharges quickly.
GRACO Ultra Max Cordless Airless Handheld Paint Sprayer

  • Achieve a flawless airless finish at any Speed, Without Thinning
  • Fully repairable for extended life It uses RACX and X FLP Spray Tips
  • Showers of Water Solvent in addition to Flammable Based Materials

View the entire article on Amazon

In a single charge one charge can spray as much as 1 gallon liquid. With this sprayer, you will get an even smooth, even finish every time. This is possible with more efficiency when compared to other sprayers. It lets you operate more efficiently and will save you time. This is an excellent option for those who want an easy device to transport and move around with. The spray tips are of good quality and there are a variety of adjustable settings and the powerful battery can give you the best spraying experience.


  • Cordless to provide greater comfort
  • It has a robust battery
  • Excellent spraying capacity
  • Adjustable spray settings
  • Simple and effective to utilize
  • Rapid charging


  • The sprayer could be difficult to remove
  • A cheaper option for a sprayer that is cordless

Spraying Polyurethane Guidelines

If you are planning to spray water-based polyurethane or use an aerosol spray can polyurethane There are a few procedures to follow when applying it. Here’s a brief guide for how you can make use of polyurethane spray.


The first essential step in every polyurethane spray task is preparation. It is essential, because you’ll be unable to get a durable polyurethane finish unless the surface is properly prepared. Begin by sanding down any surface on the object you wish to spray. Check that the surface is smooth and even and that any cracks or holes were smoothed over. Make sure to clean and dry the surface by ensuring there’s not any dust or dirt. You can then apply a stain on the surface. Allow this to completely dry.

Spraying polyurethane is best done in a location where there is there is no dirt, dust, or insects will be present. The surface of the object you spray totally clean and free of dust. When the spray the finish over dirt or dust this will alter the adhesion of polyurethane as well as collect dust beneath that clear coating.

Select the right spraying tool

In setting the sprayer up, you’ll have to ensure you have the correct spray tips and the proper setting. In general you will need a 1 to 5 inch large spray tip is ideal to use for polyurethane application. The majority of spray guns come with several tips to select from. Once you’ve set up the correct spray tip, you’ll have to get the spray volume set to the proper setting. Make use of your control knobs to ensure sufficient polyurethane is released to create an evenly distributed coating. It is possible to do several test sprays on an uncoated piece of paper or wood to verify your settings are right.

Making the Most Effective Spraying Method

If you spray polyurethane and want to get the best results, you have to follow some guidelines to achieve the most effective outcomes. Here are some helpful spraying guidelines to follow:

  • Keep a steady, long movement when spraying. Don’t stop or start in a hurry, since this could result in thick zones of polyurethane in certain places, and smaller areas of polyurethane in other places.
  • Moving continuously can help prevent drips and drips
  • Maintain a steady wrist when spraying to ensure an even as well as a thick coating
  • Always take into consideration the various spray patterns that are available, since you can alter them depending on the method and purpose you’re spraying

Allow the Coating to Dry

After you’ve applied the polyurethane coating after which you are able to allow the finish to dry. When it is fully dried it is possible to clean the finish with a thorough clean. It is done using a mild washcloth and water. Make sure to read the instructions of the manufacturer, since the different types of sprays have different drying time. If you’re using water-based polyurethane spray It will have a more rapid drying time than one that is oil-based.

Making the Polyurethane Spray

If you’re using the sprayer, you have ensure you are using the right material you spray is right. Polyurethane is a bit more dense consistency, and might require to be thinned out to make it suitable for use in the spray gun. Try using a spray gun to spray with the polyurethane with no thinning. However, if you see an orange peel finish or large clots forming it, you’ll likely require thinning it. Thinner can help make it to allow the polyurethane to flow smoothly through the nozzle of the fluid when using gravity feeder. If it’s not flowing correctly it could be because the polyurethane isn’t thick enough. If the polyurethane remains in the process of spraying in a proper manner, you might also try adjusting the pressure setting to a greater degree.

If you choose to use a thinner, make sure that the ratio is right with respect to the polyurethane. Polyurethane products must come with a reference sheet that can assist you in this. Most likely, you’ll need to add around 10% thinner in order to make for the polyurethane in preparation for spraying. The amount of thinner you need will vary from one product to the next however.

The Right Polyurethane Spray

Spraying polyurethane can only be effective if you choose the correct product for your application. Since there are a variety of polyurethane alternatives, you’ll be required to ensure you pick the best one for your particular project.

Are you looking for Oil or Water Based?

Do you spray water-based polyurethane or is it more beneficial to use oil-based polyurethane? This is among the first issues to be considered. Both work well in their own way and have distinct advantages and disadvantages. Both are very sturdy and have a fantastic look, yet there are some important distinctions between the two.

Drying Time

If you spray water-based polyurethane and it is dried, your drying time is significantly quicker than oil-based ones. Make sure you choose a spray that is the best fit for your requirements and needs. When you apply a water-based polyurethane spray the coating should be dry in approximately two hours. It is then possible to apply the second coat. The oil-based polyurethane can be dried in between five to twelve hours. It also emits smoke from drying. Water-based products are more secure and do not emit the same smoke that oil-based products emit.

The final result of polyurethane can be an additional aspect to be considered. Water-based polyurethane doesn’t offer the same deep, dark shine that you can get from oil-based items. Water-based polyurethane can only get an outstanding finish due to the final coating and oil -based products require less coats to achieve a more attractive appearance with every coat. In terms of finishing many people prefer oil-based polyurethane.

Utilizing a water-based Polyurethane Spray

Utilizing a water-based polyurethane spray in comparison with one that’s solvent-based provides numerous advantages. For one there is less fire hazard with water-based sprays. The fumes are safer and significantly diminished. The products that are water-based are also safer to use and are more environmentally green. However the water-based polyurethane is more difficult to apply.

Although the spraying procedure remains essentially identical but there are some distinct differences in the use of water-based polyurethane. We’ve offered a few solutions below.

  • It is important to be cautious to not leave any staining on the surface prior to when you begin spraying. It is essential to be diligent for working on water-based polyurethane
  • Water-based finishes don’t melt as much when sprayed. Utilizing an airless or air-assisted sprayer is a good way to enhance this process in application. application of the water-based polyurethane
  • Be attentive to the way you prepare surfaces prior to spraying. Make sure you thoroughly sand the surface and sand your first coat to allow the second coat to stick properly.
  • These water-based polyurethane finishes dry quicker than those based on oil. You can alter the drying time by altering the temperature or airflow of the work area.
  • If you are spraying the water-based polyurethane cleaning it up is a difficult task. You’ll need to remove parts of the spray gun and wash each component. Cleaning the gun with a solvent is a feasible solution to this

After you’ve finished spraying water-based polyurethane it is likely need to perform several touches-ups. The final coat is the one that offers the durability and shine. The oil-based polyurethane provides superior performance in coating as well as shine, from very first coat until the final.

Frequently asked questions

Should you paint or spray on Polyurethane?

Spraying polyurethane can give you an even and precise coat. A variety of polyurethanes are offered in spray containers. Applying the polyurethane on can be useful for flat surfaces with a lot of surface and also provides a more thick coat. But, you won’t attain the same level of smoothness across the surface as spraying. spray.

Should You Thin Polyurethane to spray it?

Polyurethane is a heavier substance, which is why it usually needs to be thinned prior to being used in the spray gun. Try spraying it without thinning to see if it is required thinning. It is different between different brands and.

Can Minwax Polyurethane Be sprayed?

Minwax polyurethane is able to be sprayed. But, there are many additional polyurethane coatings that have been specifically created to be used for spraying.

Can Polyurethane be used in airless sprayers?

Yes, most standard paint sprayers are able to be employed with polyurethane even airless models. Be sure to ensure that the sprayer is thoroughly clean between use and make sure that the polyurethane is of the correct viscosity.

How Do You Thin Polyurethane?

There are a variety of products you can apply in order to reduce the thickness of polyurethane. It is dependent on the kind of polyurethane that is being used. Some of the products are minerals spirits, turpentine paint thinner, or just water.

How Do You Get Spray Polyurethane?

There are many spray polyurethanes that are available. Polyurethane comes in a handy spray can be made or can be incorporated into the form of a paint sprayer.

Polyurethane spray gives a stunning finish for all wood surfaces. The finish is long-lasting attractive and lasts for a long time. If you’re considering applying polyurethane make sure to think about spraying it to get excellent results.

How Do You Get Professional Industrial Polyurethane?

If the DIY spray can style of polyurethane doesnt work for you, we recommend going with ArmorThane protective coatings. They are the go to company for industrial grade polyurea and polyurethane. Their products are typically sprayed with equipment and comes in the barrel load. Click here to learn more about ArmorThane polyurethane coatings.