The best polyurethane for stair treads and railings is a difficult question to answer. You need to consider plenty of factors to find the perfect non-slip polyurethane for wood stairs.

And if you’re not careful, it’s easy to choose a product that will either flake or peel off. Fortunately, we have done extensive research into the best sealer for wood stairs to offer you various stair finishing options.

In this article, we cover everything you need to know about using polyurethane for your stairs, including the best polyurethane for stairs, the steps for applying it, and tips to guide you when buying, so keep reading to learn more.

Our Top Picks

Best Polyurethane for Stair Treads

  1. Best non slip polyurethane for wood stairsVarathane 200041h Water Based
  2. Best finish for stairsRUST-OLEUM 130031 Varathane
  3. Best semi gloss polyurethane for stairsBona Mega Semi-Gloss Finish
  4. Best wipe on poly for stairsMinwax Wipe-on Polyurethane
  5. Best oil-based polyurethane for stairsDeft Defthane Polyurethane
  6. Best water based polyurethane for stairsGeneral Finishes High Performance
  7. Best premium polyurethane for stairsMinwax 63010444 Polyurethane
  8. Best finish for pine stairsInsl- X Suo31009a-01 Poly
  9. Best anti slip varnish for stairsBona Traffic Anti-Slip Polyurethane
  10. Best polyurethane varnish for stairsFixall Skid Grip Polyurethane

What is Polyurethane?

Polyurethane is a flexible, resilient, and highly durable material that serves various purposes. When applied to wood, it creates a sturdy and clear plastic protective cover making it an ideal finish for a heavily traveled area like stairs.

Stairs often have to accommodate a lot of human traffic daily, and quick wear and tear would be inevitable unless there is a hard, durable layer of protection.

So, using a polyurethane finish will not only add to the appearance of the stairs but will also help to protect the wood from damage such as stains, water, scuffs, and scratches.

Essentially, if your wood is covered in polyurethane, nothing can penetrate it as it offers a durable, hard coat.

Best Polyurethane for Stair Treads – Product Reviews

1. Best non slip polyurethane for wood stairs – Varathane 200041h Water Based Polyurethane

Varathane 200041H Water-Based Ultimate Polyurethane, Quart, Gloss Finish, 32 Fl Oz
4,119 Reviews
Varathane 200041H Water-Based Ultimate Polyurethane, Quart, Gloss Finish, 32 Fl Oz
  • Protects indoor wood surfaces such as furniture, windows, cabinets, trim and more
  • Water based formula dries fast and cleans up with soap and water
  • Dries to the touch in 30 minutes with coverage up to 125 sq. ft., recoat after 2 hours
  • Durable formula provides outstanding stain and scratch resistance with excellent clarity
  • Gloss finish creates a polished and clean look

The Varathane Poly is a top choice on our list because it is the best non-slip polyurethane in the market designed to let the natural beauty of your wooden stairs shine through.

This product is easy to use and can be cleaned simply with water and some soap, thus giving you great value for your money.

In addition to this, its durable water based formula provides your stairs with excellent protection from stain, scratch, and other forms of damage, thereby preserving its color and quality.

Another plus for this product is that it needs fewer coats and it dries up quickly after application and gives a glossy finish and polished look to your stair treads.

What We Liked Most

  • Cleans with soap and water
  • Fast-drying

What Could Be Improved

  • Not suitable for white surfaces 



2. Best finish for stairs – RUST-OLEUM 130031 Varathane

RUST-OLEUM 130031 Varathane Gallon Gloss Oil Base Premium Polyurethane Floor Finish
56 Reviews
RUST-OLEUM 130031 Varathane Gallon Gloss Oil Base Premium Polyurethane Floor Finish
  • Oil-based wood floor finish - Classic Clear Gloss
  • Excellent self-leveling eliminates brush marks
  • Delivers great scratch & mar resistance
  • Warm, golden glow

This oil-based polyurethane is made with patented Aluminum Oxide Nano Technology that makes it scuff and scratch-resistant. It also resists stains and household chemicals, so you don’t have to worry about the color changing beyond what is expected from an oil-based finish.

Another feature you would appreciate is the relatively quick drying time for a typical oil-based polyurethane. Within two hours, the stairs will be dry to touch. You can then apply a second coat in another ten hours for same-day application.

While this may seem like a lifetime compared to some of the other products on our list, it is still decent performance. But of course, the drying time is just a small part of the equation.

Varathane Premium Floor Finish offers exceptional durability, making it perfect for high-traffic stairs. You also get four choices of sheen – matte, satin, semi-gloss, and gloss.

This polyurethane for stair treads and railing can be applied on bare and stained wood. It can also be used on previously finished surfaces, as long as you follow the instructions.

As you would expect, the manufacturer recommends that you use the product as it is without diluting. Even without thinning, you will get an even surface without brush marks.

The one major limitation of this is you can’t apply it with a roller, or you may get bubbles. Instead, Rust-Oleum recommends you use a brush or a wool applicator.

PROS

  • Scuff and scratch-resistant
  • It can be applied without thinning
  • Comes in four sheen options
  • Much cheaper than the competitors

CONS

  • It shouldn’t be applied with a roller
  • Slower drying time than competitors



3. Best semi gloss polyurethane for stairs – Bona Mega Semi-Gloss Finish

Bona Mega Semi-Gloss,1 gallon
91 Reviews
Bona Mega Semi-Gloss,1 gallon
  • Price For: Each Coverage per Gallon: 500 to 600 sq. ft. Solids Content: 0.325 Size: 1 gal.
  • Green Certification or Other Recognition: GREENGUARD Certified Green Environmental Attribute: VOC Levels Meet SCAQMD Requirements Dry Time: 2 to 3 hr. Item: Floor Finish
  • Semi-Gloss Country of Origin (subject to change): Sweden

This product by top brand ‘Bona’ is a water-based floor finish perfect for use on heavy traffic interior residential and commercial floors, making it one of the best polyurethane for stairs.

It creates a harder finish, similar to the one you might find on oil-based polyurethanes but without the high VOCs, long drying times, and messy clean up associated with oil-based finishes.

It’s practically odorless and cleans up with water. It’s also important to note that this product is a lot thinner than some other polyurethane. So plan on using several coats for stair treads that require more protection than lower traffic areas.

Bona Mega comes in gloss, semi-gloss, satin, or extra matte, giving lots of options to choose from when it comes to finishing.

What We Liked Most

  • It dries fast and quick
  • One of the best eco-friendly products
  • Oxygen cross-linking creates a more heavy-duty finish
  • It comes in four finishes 
  • Due to its thin consistency, you can use it in a sprayer



4. Best wipe on poly for stairs – Minwax Wipe-on Polyurethane

Minwax 40910000 Wipe-On Poly, 1 Pint, Satin
3,834 Reviews
Minwax 40910000 Wipe-On Poly, 1 Pint, Satin
  • Easy to apply - no drips or brush marks
  • Protects wood against water, household chemicals, food stains and wear
  • Provides a hand-rubbed look
  • Protects against water, household chemicals, food stains and wear
  • Made of a high quality oil-based polyurethane

The Minwax wipe-on is an excellent water-based wipe on Poly and probably the best polyurethane for stair railings.

This polyurethane finish provides a durable layer of topcoat protection that is thinner than regular poly, making it an excellent choice for touching up small worn or scratched areas.

A unique perk of this product is that it can be applied with a lint-free cloth, so this keeps your surface free from cost drips and brush marks.

Before applying wipe on poly to any surface, ensure it is dry and free from old furnishing. This will guarantee a hard, clear finish protecting the wood against water, household chemicals, and food stains.

What We Liked Most

  • Excellent durability
  • It comes in oil and water-based two finishes 
  • Ultra-fast drying
  • Reduced odor
  • Easy water clean-up

What Could Be Improved

  • It can turn lighter colors yellow
  • It requires more coats than brush-on polyurethanes



5. Best oil-based polyurethane for stairs – Deft Defthane Polyurethane

Deft Defthane Interior Exterior Clear Polyurethane Satin Spray, 11.5-Ounce Aerosol
97 Reviews
Deft Defthane Interior Exterior Clear Polyurethane Satin Spray, 11.5-Ounce Aerosol
  • This product adds a great value
  • Excellent for interior and exterior wood surfaces including floors, doors, furniture cabinets and marine applications above the water line
  • A high-solids oil-based polyurethane formulated for hard use areas
  • This high solids oil based polyurethane formulated for hard use areas
  • Excellent for interior and exterior wood surfaces including floors, doors, furniture cabinets and marine applications above the water line

Deft is a high-solids oil-based poly specially formulated for hard use areas. It is an excellent choice for interior and exterior wood surfaces such as floors, doors, desks, furniture cabinets, etc., which makes it an excellent option for stairs.

This oil based paint is available in two surface finishes, satin finishes and 13-ounce aerosol sprays with adjustable spray valves. As for application, you can use this on painted, varnished, lacquered, stained wood surfaces to give them a clear and tough finish.

Like some other penetrating finishes, Deft resists wear and staining from water, alcohol, food, household chemicals, salt spray, exterior weathering and protects metal surfaces from rust.

What We Liked Most

  • It offers 450 VOC compliant formula
  • Superior durability
  • It’s available in a satin finish and 13-ounce aerosol spray
  • with an adjustable spray valve
  • It’s suitable for interior and exterior wood surfaces
  • It’s a natural color oil-based 
  • Higher viscosity requires a fewer coat
  • It won’t tint lighter woods

What Could Be Improved

  • It’s harder to work with than thinner polyurethanes



6. Best water based polyurethane for stairs – General Finishes High Performance Polyurethane

General Finishes High Performance Water Based Topcoat, 1 Quart, Satin
6,011 Reviews
General Finishes High Performance Water Based Topcoat, 1 Quart, Satin
  • Do not apply clear topcoats over bright white paint, as yellowing may occur due to a reaction to the substrate. Light color paints may also experience yellowing due to topcoat application, but it will less noticeable.
  • The hardest, most durable consumer polyurethane top coat on the market today
  • Dry Time Between Coats is only 1 to 2 Hours
  • Interior use only

The General Finishes polyurethane finish exhibits all of the consumer-friendly characteristics of a blend, making it an excellent choice for stair treads.

Its exceptional durability, versatility, and superior water resistance make it the go-to choice for many consumers.

On top of that, it dries quickly in about 1-2 hours thanks to its water-based characteristic and is super easy to use.

As a bonus, it contains UV stabilizers, which help keep surfaces from breaking down in sunlight and prevent underlying stains from fading.

So, if you are looking for polyurethane with superior toughness, you should opt for General Finishes High-Performance Polyurethane which comes with four different surface finishes.

What We Liked Most

  • The hard finish provides super protection
  • It can be applied using multiple methods
  • It has a low VOC formula
  • It dries quickly
  • It comes in 4 different finishes 
  • It’s for interior use only

What Could Be Improved

  • It’s quite expensive
  • Don’t use on white paint; it yellows



7. Best premium polyurethane for stairs – Minwax 63010444 Polyurethane

Minwax Fast Drying Polyurethane Protective Wood Finish, Clear Satin, 1 Quart
8,496 Reviews
Minwax Fast Drying Polyurethane Protective Wood Finish, Clear Satin, 1 Quart
  • PROTECT WOOD SURFACES – Minwax Polyurethane Wood Finish protects interior projects like woodwork, furniture, floors and cabinets. The oil-based, clear top coat is one of the most durable coatings for wood protection against scratches, spills and more.
  • OIL-BASED DURABLE FINISH – Clear finish provides long-lasting protection and warm beauty to both finished and unfinished wood projects. Protective coating is ideal for woodwork, furniture, doors, cabinets & floors, and is available in a variety of sheens.
  • SATIN SHEEN – Give your wood projects a sleek finish with this satin clear varnish. It not only protects the natural beauty of the wood, but offers a soft, unique sheen for a modern, cozy and on-trend look.
  • FAST DRYING – Get more done with this protective poly coating. It’s a fast-drying clear coat, which allows for quick recoats after 4-6 hours, letting you get projects done faster. Be sure to apply with a high-quality natural or foam brush.
  • A BRAND YOU CAN TRUST – Minwax is America’s leading brand of wood finishing and wood care projects. Since 1904, we have been inspiring consumers to Keep on Finishing. We offer consumers a complete line of products to meet every wood finishing need.

As a premium Minwax polyurethane for stairs, the Minwax 63010444 is a fast-drying polyurethane that provides a long-lasting, protective coating for all wood surfaces.

It is a highly durable coating for wood protection and is ideal for floors, furniture, doors, and cabinets. It can be used on both finished and unfinished wood.

To avoid lap marks when applying on wooden floors, you could use a lambswool or synthetic pad applicator or a natural bristle brush.

Additionally, this product works best after three coats are applied to ensure maximum durability. You will have to avoid heavy traffic or replace furniture for 72 hours after the final coat.

Do not slide furniture when replacing it. Also, do not install rugs or clean the floors for seven days after finishing the final coat.

Occasionally, slight ambering may appear when polyurethane is applied over light-colored wood surface finishes.

Always spot-test in an inconspicuous area to ensure a successful application.

What We Liked Most

  • It can be used on both finished and Unfinished wood
  • Its superior durability makes it ideal for use on all your wood surfaces
  • Inexpensive
  • Shorter than average dry times for oil-based polyurethanes
  • It comes in 5 different finishes 
  • Perfect for interior surfaces 

What Could Be Improved

  • It’s oil base and emits strong fumes
  • It’s thinner than other Polyurethane  



8. Best finish for pine stairs – Insl- X Suo31009a-01 Poly

INSL-X CC560109A-01 Cabinet Coat Enamel, Semi-Gloss Paint, 128 Fl Oz (Pack of 1), White
347 Reviews
INSL-X CC560109A-01 Cabinet Coat Enamel, Semi-Gloss Paint, 128 Fl Oz (Pack of 1), White
  • The ultimate “factory-like” finish for refurbishing kitchen and bathroom cabinets, shelving, furniture, trim, and crown molding
  • Delivers an ultra smooth, durable urethane acrylic cabinet and trim paint finish
  • Super adhesion to hard-to-coat surfaces without primer
  • Durable semi-gloss finish that resists chipping, scuffing, food stains, grease & water
  • 350 - 450 square foot coverage per gallon; VOC Level: < 50 g/L

Insl is one of the best anti slip finishes for stairs due to its durability and skip resistance. With its acrylic anti-slip coating and abrasion resistance, it is suitable for and can be applied to stairways and walkways and recreation areas with high traffic levels.

It is also relatively easy to use and fills up all seals and cracks. The fast-drying nature of this product makes it suitable for various surfaces, such as wood, concrete, and metal.

You can expose it to light foot traffic 24 hours after the final coat is applied, but you will need to wait 4-5 days for areas that receive heavier or continuous foot traffic.

The product is available in seven colors, Tile red, pine green, desert sand, white saddle brown, gray pearl, light gray, white, and it is designed with a color retention formula to help maintain the color. 

What We Liked Most

  • Easy application
  • Its fast-drying and durable
  • It’s available in 5 ready mixed colors and white
  • It’s perfect for interior and exterior use
  • Anti-slip paint

What Could Be Improved

  • It’s quite pricey 
  • It’s only available in matte finish



9. Best anti slip varnish for stairs – Bona Traffic Anti-Slip Polyurethane

Bona Traffic Anti Slip Satin
103 Reviews
Bona Traffic Anti Slip Satin
  • NEW VERSION TRAFFIC HD ANTI SLIP SATIN
  • Unsurpassed scuff, scratch and chemical resistance at full cure
  • No sealer needed over a stained floor
  • Exceptional build with excellent flow and leveling

Bona Traffic Anti-slip is a waterborne, commercial, and residential hardwood floor finish explicitly designed for the unique demands of heavy-traffic commercial and residential hardwood floors.

This clear and colorless floor finish highlights the natural wood tone of stained or natural wood floors. It is the industry’s premier finish for durability and beauty, covering over 350 to 400 square feet per gallon.

As a result of its higher friction quality, it makes an excellent choice for stairs, nurseries, kitchens, and similar places.

The material will not change color over time, allowing for easy touch-ups. It is designed mainly for areas more likely to be wet, like commercial kitchens or living spaces for people with compromised balance.

For people who fear that their stairs are too slippery, this can be the perfect solution.

What We Liked Most

  • Easy application
  • Its fast-drying and durable
  • It’s available in 5 ready mixed colors and white
  • It’s perfect for interior and exterior use
  • Anti-slip paint

What Could Be Improved

  • It’s quite pricey 
  • It’s only available in matte finish



10. Best polyurethane varnish for stairs – Fixall Skid Grip Polyurethane

FIXALL Skid Grip Anti-Slip Acrylic Paint - Textured Coating for 100% Skid Resistance - Ideal for Sport Courts, Pool Areas, Sidewalks, & Parking Lots - Color: Cobalt (1 Gal)
676 Reviews
FIXALL Skid Grip Anti-Slip Acrylic Paint - Textured Coating for 100% Skid Resistance - Ideal for Sport Courts, Pool Areas, Sidewalks, & Parking Lots - Color: Cobalt (1 Gal)
  • ANTI-SLIP PAINT: Skid Grip is an acrylic textured paint that can turn any surface into a skid-resistant one. The durable coating is ideal for indoor or outdoor use to create a high-grip finish.
  • INCREASE SAFETY: This slip-resistant coating is ideal for making high-traffic areas safer. Add it to a patio, pool deck, basketball court, driveway, step, ramp, or playground to prevent falls.
  • ADHERES TO MOST SURFACES: Whether for home or commercial use, liquid Skid Grip can be used on almost any surface. It adheres to cement, wood, stone, asphalt, and more.
  • EASY APPLICATION: To create a non-skid surface, first clean the surface thoroughly to remove any debris. Then use a brush or roller to apply Skid Grip and create texture. Allow ample time to dry.
  • MULTIPLE COLORS AVAILABLE: Don't let a textured surface become an eyesore. We offer Skid Grip in fade-resistant colors, including Camel, Cobalt, Crimson, Emerald, Jet, Plain, and Slate.

The Fixall Skid Grid rightfully takes its place on our list as one of the best non-slip polyurethane for wooden stairs. This is a 100% acrylic textured coating that can turn any surface skid-resistant.

Moreso, this product can be used to create beautiful walkways or patios.

Due to its durable coating, you can use it in high-traffic areas such as walkways, parks, sports fields, basketball courts, and pool decks.

Its superior adhesion and fade resistance allow it to be used on almost any surface, and it adheres easily to cement, wood, stone, asphalt, and more.

Another unique perk of this product is that it gives your wooden surfaces an extra layer of protection from Ultraviolet exposure, which will prevent peeling and flaking of your wood.

This product comes in multiple fade-resistant colors, which help beautify your surface. All in all, it is a durable product suitable for residential or commercial applications.

What We Liked Most

  • Easy application
  • Slip Resistant Surface
  • Perfect for interior or exterior
  • Color Fade Resistant
  • It comes in 7 different colors 
  • It exceeds ADA Standards for Slip

What Could Be Improved

  • It doesn’t adhere to all surfaces



Best poly for Stairs Comparison Table

Factors to Consider when Buying Poly for Stairs

Before choosing the best polyurethane for stairs, there are some essential factors to consider to help you make the right buying decisions. Some of them include: 

Quantity

If you’re already considering applying polyurethane to your stairs, you’re probably wondering, how many tins of poly should I buy?

The short answer to that is, it depends on the type of polyurethane finishing you’ll be using and the level of traffic on your stairs.

Stairs with heavy traffic will require a lot more coating to adequately protect the wood from damage which may mean purchasing more tins.

Furthermore, if you decide to use a water-based finish, your wood stairs will require a lot more coating than oil-based ones, and that is something to keep in mind. 

Both oil and water-based polyurethane have their strengths and weaknesses, which we discuss in more detail below. 

Color

When it comes to highlighting the figure and color of your wooden stairs, oil-based products will generally achieve more color and definition. Oil-based poly has an amber hue, whereas water-based poly is clear. 

An oil-based polyurethane will continue to amber and darken over time, while water-based poly will remain clear for the lifetime of the hardwood floor.   

Drying time

If you plan to finish your hardwood stairs without staying away from your house for a long time, you should be leaning towards water-based poly.

Water-based poly takes about 6-24 hours after coating for the stairs to dry enough for use, unlike its oil-based counterpart. 

Sheen

When choosing a fresh finish for your stairs, appearance is also something you must consider. Likewise, it is crucial in the flooring process because you need to be comfortable with how much light your floors absorb and diffuse.

Remember that glossier floors would show more dirt and imperfections than matte floors. However, if you prefer a shinier look on your floors, a semi-gloss coat is a good option since it has nearly 55% luster. 

Size

Most polyurethane products cover between 300 and 600 square feet per gallon. For much larger staircases or hardwood floors, then you may have to purchase more than one tin to coat the entire surface properly. 

Types of Polyurethane

Polyurethane is regarded as the most practical yet easily-available hardwood finish. Polyurethane surface finishes have two main types: water-based and oil based polyurethanes.

Both protect hardwood floors from damage, and you should choose the one you prefer based on your preferences and the job at hand.

Oil-based Polyurethane

Oil-based or oil-modified polyurethane is created by reacting common finishing oils with a chemical that makes the oil molecules larger.

These polyurethane finishes are often chosen because they are more economical and easier to apply on wooden surfaces. It also offers more color, depth, and shine to wooden surfaces.

Furthermore, just like oil based stain, oil modified poly offers high chemical scratch resistance making it well-suited for use on tables, countertops, floors, and furniture that will see a lot of traffic. 

Oil-based poly is popular since it enhances the natural color of hardwood floors, is water-resistant, and is versatile. In addition to that, oil-based poly is more durable because it contains a significant amount of Volatile Organic Compounds (VOCs).

It immediately gives the surface a darker shade or an amber hue when applied to the hardwood floor. This can bring out the beauty of the grain and make any dull wood color come alive.

On the flip side, as the oil-based finish ages, it continues to grow slightly darker every year, and this may make it less suitable for certain stairs types.

In addition, it has strong fumes, which could be hazardous and take longer to dry. You should therefore be keen when choosing oil based polyurethane brands to get the best product.

Water-based Polyurethane

As the name implies, water-based polyurethane uses water as its base or primary agent instead of oil (solvents) to carry the polyurethane solids. In the past, water-based polyurethane was considered less durable than oil-based polyurethane.

However, its manufacture has improved recently, so flooring professionals now prefer water-based polyurethane over almost any other finish. In fact, good quality water-based poly will last just as long if it is well taken care of.

Apart from this, a water-based polyurethane is a non-yellowing clear coat thus preserving the natural color of your wood compared to the oil based ones.

This is especially useful for certain types of wood which you don’t want to alter their color like gray, white & lighter wood.

Overall, water-based polyurethanes have become popular because of their low odor, rapid drying time, and easy application.

Satin or Semi-gloss Polyurethane for Stairs?

Satin polyurethane keeps wood looking new for longer periods and hides normal wear and tear of regular use; that is why it’s the best polyurethane for stairs.

When choosing between a Satin finish or Semi-Gloss finish for your stairs, consider your color preference, wood transparency and the degree of durability your stairs require.

You must first realize that the glossier your floors are, the more they show off dirt and imperfections. Therefore, if you want a subtler and more formal look for your space, satin will make a better option.

Satin reflects less light, giving your wood a duller, low sheen appearance. This quality makes it relatively easy to hide all the imperfections and dirt, which makes it a plus for homes with pets and kids because it is easier to keep clean and smudge-free.

In addition, satin isn’t as smooth as Semi-Gloss, so it’s less slippery, making it a bit safer to use on stairs. On the other hand, Semi-Gloss finishes are perfect if you prefer a shinier glossier look for your floors.

Since it reflects more light, debris on the surface will be more visible. Ultimately, you can choose any of the two but remember, the glossier the finish, the more it will show any imperfections and wear and tear. 

How to Apply Polyurethane on Stairs 

Material/Tools needed:

  • Polyurethane in a can 
  • Sandpaper
  • Painter’s Tape 
  • Paint Brush
  • Tack cloth 
  • Lint-free rags 
  • Lamb’s wool applicator

Step-by-step process

  1. Using 120-grit sandpaper, sand the steps so the surface is flat and smooth. Then, gently brush the steps with a brush attachment to remove sanding dust and use a tack cloth to smooth the steps further.
  2. Apply painter’s tape along the trim of the stairs to protect the walls from polyurethane. Cover the bottoms of any spindles or other objects on the stairs that you don’t wish to get the finish on.
  3. Invert the polyurethane can gently about ten times before use, and repeat this regularly as you work. Do not shake the can as this will cause bubbles in your finish.
  4. Take your polyfoam brush, and dip it halfway into the poly. Hold it there for a few seconds, so it really soaks in and fills up the brush. Let some excess drip off back into the can, and then bring it to the wood surface.
  5. Apply a thin coat of polyurethane onto the wood stairs. Start at the top stair and work your way toward the bottom. Run the brush along the stair using long, uniform strokes. Move the brush in one direction only, i.e. in the direction of the wood grain. Back brush over any drips or pools of polyurethane.
  6. Leave the stairs to dry for two to 12 hours, or the time recommended on the manufacturer’s label.
  7. Allow the first coat of finish to dry overnight. Sand the stairs smooth with 200-grit sandpaper. Vacuum the stairs, then clean with ph neutral cleaner and tack cloth. 
  8. Apply a second coat the next day in the same manner using a clean brush. Do not thin the polyurethane when applying the subsequent coats. Let the second coat dry overnight. Sand, clean, and apply a third coat, if necessary. A fourth or fifth coat may be required to achieve the desired appearance, but first confirm the number of polyurethane coats you will need. Be sure to sand and clean the wood in between each coat. Do not sand the final coat of finish.

Is Polyurethane Slippery?

Although polyurethane serves a good purpose by helping to keep surfaces protected, some types of polyurethane may cause people to slip and fall.

Already, the smooth polished surface of hardwoods makes them quite slippery on stairs and using the more shiny and glossy variety of polyurethane will make your floors even more slippery. 

Therefore, to prevent accidents and injuries, you could go for anti-slip or anti-skid polyurethane products like the Varathane 200041h, Fixall Skid Grip, or Bona Traffic Anti Slip that are specially formulated to turn any surface skid resistant. 

Alternatively, you could opt for transparent adhesive slip strips, anti-slip sprays, and floor finishes. They will add some grip to your stairs without detracting from their appearance.

Stair carpet strips, anti-slip tape, and stair runners are other options but these will take away from the beauty of your stairs by covering part of them.

Ultimately, hardwood floors are beautiful, but they can also cause accidents. However, using some of the tips above, you can have a beautiful, shiny floor without putting your life in danger.

Frequently Asked Questions

What is the best finish for an oak staircase?

A simple way to finish oak stairs is with two coats of clear polyurethane, which brings out both the grain and the reddish tinge of the wood. You can further enhance the warmth by staining the treads before applying polyurethane.

For this, we recommend you use the Minwax 63010444 Polyurethane 

Can you polyurethane over painted stairs?

Yes, you can. By applying polyurethane to already-painted stairs, you can provide them with extra protection against heavy foot traffic that can cause the paint to chip and crack over time.

It will also give the hardwood a glossy sheen that makes it easy to clean. 

How many coats of polyurethane do I need on stairs?

In general, two to three coats of oil-based polyurethane are enough to cover a set of wood stairs. However, water-based polyurethane does not coat as thickly as oil-based polyurethane, so you might need four or multiple coats for maximum protection.

Are polyurethane side effects free?

Unfortunately, they aren’t. Uncured polyurethane can irritate people with respiratory problems. However, that does not mean you are putting anybody at risk. As long as you apply polyurethane correctly, whether it is oil-based or water-based, you and everybody around the product will be safe. It is also important to note that these side effects are more likely during the production process, not the application process.

What is the best varnish for stairs?

If you wish to maintain the quality of the appearance of your stairs, a clear water-based polyurethane varnish is the best option. Apply it with a brush to coat your wood and then apply a second cag coat within 24 hours and let it dry to create a hard and durable surface finish.

Brands of polyurethane that I highly recommend. – Minwax, Bona, and Varathene.

What is the Best Finish for Stair Treads

Though elegant and durable, wooden stairs would lose their attractiveness and appear dull if not properly maintained.

Using the best polyurethane for stair treads can give your wooden statues the protection it needs to remain beautiful and durable.

Now that you’re done reading this, you can go on to get the right products you need to keep your stairs free from water or sunlight damage.

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