Knowledge Builders

can you put polyurethane over walnut oil

by Mr. Lindsey Beatty Published 3 years ago Updated 2 years ago
image

In short, yes you can put polyurethane

Polyurethane

Polyurethane is a polymer composed of organic units joined by carbamate links. While most polyurethanes are thermosetting polymers that do not melt when heated, thermoplastic polyurethanes are also available.

onto any oiled finish… including Tru-oil finishes. What’s more, more often than not, its a fairly good idea to do so. That’s because, while an oil finish might be durable, it is nowhere near as resilient as polyurethane.

The short answer is “Yes, if it's the right oil, and you let it dry first.”Nov 3, 2018

Full Answer

Can I apply polyurethane over non-drying oil?

you should not apply poly over a non drying oil. my advice would be to srub the surface with alcohol and then lacquer thinner a few times and then sand smooth and apply one of the two readily available oil, let dry [ a week or more for tung], and then apply your poly.

How do you finish wood with tung oil and polyurethane?

Between coats of polyurethane, examine the surface of the wood for imperfections in the finish. Sand the small bubbles and drip marks with fine grit sandpaper. Wipe away the dust and then apply the next coat of polyurethane. Tung oil and polyurethane give a warm, natural finish.

Is polyurethane or oil finish better for stained wood?

Poly has its place in your DIY arsenal...but for me, oil finishes are best on any natural or stained wood piece especially if they will need touch up from time to time! Whether you apply a stain or leave the wood natural, there is no durable finish that allows the beauty of a wood grain to show through as well as oil!!!

Can You polyurethane over varnish?

You do tend to see an increase in drying time, but contrary to many statement to the contrary online the oil will cure perfectly well under a coat of poly, because the varnish is not at all a perfect oxygen barrier. However, polyurethane is by no means a single product and the above does not apply to Rust-Oleum's Ultimate as it's a waterbased poly!

image

Can you seal wood that has been oiled?

In most cases, you can safely apply varnish over an oiled piece of wood because the varnish contains oil, as well. Water-based varnishes are an exception to this rule. Look for an oil-based varnish, and read the package directions to ensure that it is compatible with an oil finish.

Can I put polyurethane over linseed oil?

There's no real penalty for applying poly over-boiled linseed oil. Follow the steps properly. Polyurethane is a synthetic polymer, and there're various ways of applying it over your linseed furniture at room temperature. The easiest way to apply poly over linseed oil is to use a spray bottle or brush.

Can I apply polyurethane over odies oil?

Yes, you can put a water-based polyurethane coat over Danish Oil. It will adhere to the finish as long as the Danish oil coat is fully cured.

Should you oil wood before varnishing?

No, it is an oil-based solution that will penetrate the wood surface without a problem. If the woodwork was oiled beforehand, the varnish hardens over the older layer.

Can you put polyurethane over oiled wood?

In short; you CAN apply a lacquer or a polyurethane over a Danish oil. Just as you can over any Drying Oil. The key to success is to make sure the oil has fully dried first. This should make sense, because once dried, the oil has cured to a hard solid film surface, and stuff will now stick to it.

Will mineral spirits remove linseed oil?

Yes, mineral spirits can remove tung oil or linseed oil.

Can you put water-based polyurethane over oil-based?

Yes, you can apply water-based polyurethane over oil-based polyurethane. Given that both bases accomplish the same task, using one on top of the other is not a problem, whether for a refinishing job or a new project.

Can you use water-based polyurethane over oil stain?

Yes, you can apply water-based polyurethane over oil-based stain. You may be thinking, “But oil and water don't mix,” and you'll be right. You won't be mixing them; you'd just be applying the polyurethane over the stain.

How long does tung oil need to dry before applying polyurethane?

How long does Tung oil need to dry before applying polyurethane? If you used 100% pure Tung oil product, you might need to wait up to a week before applying polyurethane. However, if you used a Tung oil finish (polymerized Tung oil), wait 24 hours before finishing with poly.

How long does it take walnut oil to dry?

Walnut oil dries in four or five days. It's an expensive oil, but like so many art supplies, quality is what you're paying for! Walnuts naturally contain about 65 percent oil.

Is Walnut Oil Good for wood?

Much more than a wood salad bowl finish, Mahoneys walnut oil is a killer MULTIPURPOSE wood protectant for your furniture, wooden floors, woodworking projects and even musical instruments. Use it as an efficient desk, dining table, cabinet or shelf walnut finish for protection against scratches, spills and abrasion.

Is it better to oil or varnish wood?

On the whole, varnish is more resistant to water, heat, solvents or other chemicals than oil. It seals the surface. It is also a more glossy finish than oil. Varnish is gives a more glossy finish than oil.

How long does it take linseed oil to cure?

Raw linseed oil makes a great finish for wood products if applied in thin coats and given plenty of time to cure, but it can take 2-10 weeks to fully dry depending on the environment and the thickness of the application.

Can I use Minwax over linseed oil?

Minwax Wood Finish (Minwax's name for their oil based pigment stain) contains a small amount of varnish used to hold the pigments onto the wood surface. Because it is a varnish, it will effectively seal the surface and pores of the wood. This will prevent any absorption of linseed oil.

How long does linseed oil last on wood?

Maintenance will have to be done about once a year or according to the wear of the finish. Dry looking or discolored wood is a good indicator that you need to reapply a light coat of oil. Simply clean the surface with a damp cloth, let dry completely and apply the oil, wiping all excess oil after 5 minutes at most.

Is boiled linseed oil waterproof?

In fact, boiled linseed oil won't be water resistant at all. The surface will dull after short contact with water. Both oils will produce a slight orange coloring (called “yellowing”), which will darken as the finish ages.

What is a single component polyurethane finish?

Single component polyurethane finishes are uralkyds, I believe. That is: oil modified polyurethanes, where the oil is the part that bonds. The polyurethane part is already polymerized (but obviously not very long, or it wouldn't be soluble in solvent).

How does linseed oil polymerize?

I looked up linseed oil on Wikipedia and it led me to drying oils. These oils polymerize by reacting with ambient O2. I also attempted to research the curing process of polyurethane but discovered there are many different types with many different uses, so it was difficult to find info. I thinkthey cure by reacting with ambient moisture.

What does it mean when oil is not cured?

Not allowing the oil beneath to cure fully will mean that part of the oil mixes with the solvent used to carry the polyurethane (assuming oil-based poly), leading to a splotchy finish. If you're using a water-based poly, it will bead up like water on an oil slick. See this related Question.

Can you use oil based polyurethane for tan?

If you like the subtle tan/yellow coloration BLO provides, an oil-based polyurethane should provide a similar tinting. Or, you could use a tinted stain/dye for the same coloration and then finish with poly. Since BLO has a widely-varying curing time (especially in colder weather), it's far more consistent to use a stain/dye for coloration.

Is Rust Oleum polyurethane water based?

However, polyurethane is by no means a single product and the above does not apply to Rust-Oleum's Ultimateas it's a waterbased poly! As a rule no waterbased product should ever be applied to an oily surface.

Can you apply waterborne oil to oily surfaces?

You'll have significant application difficulties, as you'd expect applying a water-borne product to an oily surface. The most significant effect can be an uncontrollable beading, which prevents any sort of even coverage.

Can you varnish poly over oil?

Re. the poly over undried oil leading to a splotchy finish, I haven't noticed that in practice. I've used varnish (multiple types) over freshly-applied oil many times and never had this problem. Experimentally I've even applied it immediately after the oil, with the same result — no visible difference. What mostly goes unacknowledged is that the usual 'drying' time allowed for BLO before varnishing means that in fact almost allusers apply it before the BLO has cured.

So, Can You Honestly Put Polyurethane Over Oiled Wood?

In short, yes you can put polyurethane onto any oiled finish… including Tru-oil finishes. What’s more, more often than not, its a fairly good idea to do so.

Top 3 Tips For Prepping Tru-oil For Polyurethane

Do not try applying polyurethane directly onto a soft Tru-oil film. Wait for that finish to fully cure.

How to fill grain in wood?

Sand and reapply grain filler as necessary to fill the wood pores as well as you can. Apply coats of poly and sand them down until you establish a perfectly level surface. Apply one perfect show-coat. Rub it out with steel wool and wax.

Why does wipe on poly dries faster?

Wipe-on Poly lays down faster because it contains a lot more solvent. It also dries faster because of the higher solvent content. In a clean shop, I can brush on a coat of wiping varnish and return the next day to a surface ready for 0000 steel wool and wax.

Is glass finish hard to apply?

This is not a hard finish to apply. It is a tedious finish to apply. It is an exercise in patience, and it renders the shop useless from start to finish (pun!). If you have the patience and you want the appearance and durability of glass, the results are undeniably spectacular. I sincerely hope you don’t wait 8 years from the time you build your project until the time you apply the finish but if it takes that long to find a month to apply this finish, you’ll be forgiven.

Can you lay horizontal paint on thick?

For horizontal surfaces, I lay it on thick during the building stage. For vertical surfaces that cannot be rendered horizontal, the process is the same but with much less product to avoid sagging. Less product equals more coats, which equals more days… you get the picture.

Can you sand grain filler with a sander?

One tip I’ll share is to resist the temptation to level your grain filler with a random orbital sander. It is simply too easy to grind through the filler and re-open the grain. Hand sanding is real work on a product as hard as Aquacoat but sanding through the filler is defeatist.

How to thin polyurethane?

With your workpiece ready, thin the oil-based poly by adding mineral spirit to reduce polyurethane by 10 percent. Don’t thin if you’re using water-based poly. Thinning makes the paint flow smoothly, as well as reduces brush marks.

What Else Can I Put Over Boiled Linseed Oil Apart From Polyurethane?

So you want to know what you can apply over-Boiled Linseed Oil paint to protect it ?

How Long Does Boiled Linseed Oil Cure?

Raw linseed oil is a drying oil, and despite its short drying time, it will take between 30 to 45 days to cure and can be used as a topcoat.

Should You Sand Between Coats Of Linseed Oil?

Yes, but you shouldn’t sand the final coat. First, I need to mention, this isn’t recommended for decking with grooves since it could cause warping and cracking. But it will work great on oak patio doors, kitchen, and laundry room decks.

Does Boiled Linseed Oil Darken Wood?

Did you know, Boiled Linseed Oil paint can change the color of any surface? Unlike the liquid paint often available only at art stores, Boiled Linseed Oil can penetrate the wood’s pores, creating a permanent color change in minutes, especially if it is kept in low-light conditions.

How Many Coats Of Linseed Oil Should I Apply?

For example, if you have a large piece of wood you want to color, you may want to make more than one coat of oil.

Can You Put Clear Varnish Over Linseed Oil And Stick?

However, many amateur painters aren’t aware of the clear varnish that is available over it.

Does tung oil darken?

Tung darken when applied but once it darkens it does not continue to darken. The other would be dehydrated castor oil which is not generally available to the home owner. there are a few more but with the same unavailability as to ease of local purchase.

Is mineral oil good for butcher blocks?

Mineral oil is not a drying oil, fine for butcher blocks that food is being prepared on, not good for a home desk work surface and not necessary. You have a few choices as to "drying" oils to take its place, tung, linseed oil [boiled] are the main two used though BLO darkens with age.

Can you use polyurethane over non-drying oil?

you should not apply poly over a non drying oil. my advice would be to srub the surface with alcohol and then lacquer thinner a few times and then sand smooth and apply one of the two readily available oil, let dry [ a week or more for tung], and then apply your poly.

Can you use polyurethane on wood?

Keep in mind that polyurethane, both the water based and solvent based is one of the worst adhering finishes you can use. If you don't do an overkill stripping the mineral oil off the finish is likely to peal on you. You might also put a coat of Zinsser Sealcoat on the wood before using the Polyureseal .

Can you topcoat VM&P Naptha with lacquer thinner?

I agree with the suggestions of removing any oil with lacquer thinner first. If your intent is to try to enhance the grain before topcoating, I would use 25% BLO in VM&P Naptha. Once dry, it can be topcoated with most any film finish.

What is oil finish?

Oil is a "penetrating" finish so you really want the wood to soak up those first few coats. I usually use a circular motion to apply...kind of like "waxing." Then I just wipe "with the grain."

Is there a better finish for touch ups?

Well, because it is super easy to apply and there is no better finish for durability and touchups!

Can you leave wood natural with stain?

Whether you apply a stain or leave the wood natural, there is no durable finish that allows the beauty of a wood grain to show through as well as oil!!!

Is oil finish as durable as poly?

Oil finishes are super durable...in my opinion, just as durable as poly. To me, poly finishes look "plastic" and tend to mask the texture and depth of a beautiful wood grain! 3) Touch up. This is the real kicker. Oil finishes are super easy to touch up or "bring back to life.".

How to apply polyurethane to wood?

Dip a fine grit scrub sponge into the polyurethane. Rub the finish into the wood until it is coated with a light layer. Let the polyurethane dry overnight. Apply two to three coats of the polyurethane allowing each a day to dry before applying the next.

How to get perfect finish on polyurethane?

For a perfect finish use sandpaper between polyurethane coats. Between coats of polyurethane, examine the surface of the wood for imperfections in the finish. Sand the small bubbles and drip marks with fine grit sandpaper. Wipe away the dust and then apply the next coat of polyurethane.

How to get tung oil off wood?

Squirt 2 tbsp. of tung oil onto a rag. W ipe the tung oil into the bare wood. Wipe away the excess oil. Continue applying tung oil to a rag and wiping away the excess until you have covered the entire surface. Let the oil absorb into the wood until it is no longer glossy. Add two to three coats of the oil.

How to remove paint from wood?

Remove the original finish on the wood with a paint scraper. Hold the scraper away from your body and pull toward you to pull the finish off in long strips. Wipe the paint residue onto the side of a bucket.

How to get chemical residue off wood?

Mix 1 tbsp. of dish washing soap with warm water. Soak a sponge with the soapy water and wring out most of the water. Wipe the wood to remove the chemical residue. Let the wood dry.

How to remove a sanded sand from wood?

Step 1. Put on a mask, protective eye wear and rubber gloves. Dip an old paintbrush into paint stripper. Apply a thick coat of the paint stripper to wood. Allow the stripper to sit on the wood and soften the finish for 15 to 20 minutes.

Can you leave tung oil on wood?

Leaving the wood in its natural state, however, does not mean that you should leave it unprotected.

image

1.Can I Apply Lacquer or Polyurethane Over an Oil Finish?

Url:https://kingsfinewoodworking.com/blogs/news/can-i-apply-lacquer-or-polyurethane-over-an-oil-finish

14 hours ago Can I apply polyurethane over oil before oil cures? Yes, broadly speaking you can do this and there is no real penalty. You do tend to see an increase in drying time, but contrary to many statement to the contrary online the oil will cure perfectly well under a coat of poly, because the varnish is not at all a perfect oxygen barrier.

2.finishing - Can I apply polyurethane over oil before oil …

Url:https://woodworking.stackexchange.com/questions/2583/can-i-apply-polyurethane-over-oil-before-oil-cures

23 hours ago In short, yes you can put polyurethane onto any oiled finish… including Tru-oil finishes. What’s more, more often than not, its a fairly good idea to do so. That’s because, while an oil finish might be durable, it is nowhere near as resilient as polyurethane.

3.Can You Put Polyurethane Over A Tru-oil Finish? [3 Quick …

Url:https://www.thewoodworkplace.com/polyurethane-over-tru-oil/

27 hours ago  · Step 2: Apply Tung oil. Here’s a quick preview of how to apply Tung oil if you’re starting with natural wood. First, sand it to smooth down any imperfections. Then, use 120- grit and finish with 150 to ensure the natural wood feels soft to the touch. Use a power sander or sanding block depending on the surface size.

4.Foam Brush Polyurethane Finish on Walnut - Todd's …

Url:https://www.toddswoodwork.org/foam-brush-polyurethane-finish-walnut/

18 hours ago  · Using a fine-bristled brush, apply the first light coat of polyurethane over your boiled linseed oil. Apply a thin and even coat. Once done, wait for it to dry. For water-based poly, please give it up to 6 hours of drying time, while for oil-based, you’ll have to wait for 24 hours.

5.SOLVED! Can You Put Polyurethane Over Linseed Oil?

Url:https://woodworkingclarity.com/polyurethane-over-boiled-linseed-oil/

29 hours ago Don’t Put Polyurethane Over Mineral Oil (Do This Instead) A quality wood finish is key to preserving wood. It will stop water from soaking into wood grain, and prevent timber from succumbing to rot and decay. But, while mineral oil is a popular food-safe wood finish, this non-drying oil isn’t durable.

6.Polyurethane over mineral oil? - Woodworking Talk

Url:https://www.woodworkingtalk.com/threads/polyurethane-over-mineral-oil.36195/

23 hours ago  · Keep in mind that polyurethane, both the water based and solvent based is one of the worst adhering finishes you can use. If you don't do an overkill stripping the mineral oil off the finish is likely to peal on you. You might also put a coat of Zinsser Sealcoat on the wood before using the Polyureseal.

7.Why I prefer oil finishes to polyurethane! - Beckwith's …

Url:http://beckwithstreasures.com/journal/2015/1/14/why-i-prefer-oil-finishes-to-polyurethane

32 hours ago Squirt 2 tbsp. of tung oil onto a rag. Wipe the tung oil into the bare wood. Wipe away the excess oil. Continue applying tung oil to a rag and wiping away the excess until you have covered the entire surface. Let the oil absorb into the wood until it …

8.How to Refinish With Polyurethane Over Tung Oil - Hunker

Url:https://www.hunker.com/13411941/how-to-refinish-with-polyurethane-over-tung-oil

33 hours ago

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 1 2 3 4 5 6 7 8 9