How to Seal Wood Naturally: Best Practices for Non-Toxic Sealers, and DIY Methods

Wood is popular with furniture and home decor enthusiasts due to its rich grain and timeless appeal.

Sealing wood is important in its maintenance and longevity, as it acts as a protective barrier, preventing UV rays and environmental pollutants.

Non-toxic and natural sealants offer many benefits, such as being free from harmful chemicals, making them safer for the environment, and enhancing the wood’s natural beauty.

What sealing does and why it’s necessary

Sealing is essentially applying a protective coating to the wood’s surface. This coating acts as a shield, blocking water, dirt, sunlight, and other damaging elements.

As for whether natural wood needs to be sealed, the answer is it depends. It might not require sealing if the wood is indoors and not exposed to moisture or sunlight.

However, sealing is necessary for outdoor furniture, decks, or any wood exposed to the elements to prolong its life and maintain its beauty.

A Look at Different Types of Sealers

Sealers come in various types, each with its unique characteristics and applications.

1. Non-Toxic Sealants for Wood

Non-toxic sealants are a fantastic option for those seeking a safe, eco-friendly solution. They lack volatile organic compounds (VOCs), harmful chemicals in traditional sealants. Beeswax and linseed oil are popular natural, non-toxic choices.

2. Wood Finish for Furniture

When it comes to furniture, you want a finish that protects and enhances the piece’s aesthetic appeal. Natural oil finishes, like tung oil or walnut oil, can deepen the color of the wood and highlight its grain while providing a robust protective layer.

The Importance of Non-Toxic Sealers

Traditional wood sealers have been a go-to for years. However, they come with a hidden cost – toxicity. Many contain VOCs, which release toxic fumes, potentially causing headaches, dizziness, or long-term health effects. They can also harm the environment, contributing to air pollution and ozone depletion.

Advantages of Non-Toxic Sealers

On the other hand, non-toxic sealers are the heroes of the wood sealing world. They are safe, sustainable, and effective. They don’t release harmful fumes, making them safer for indoor use and better for your health. Plus, they’re eco-friendly, causing minimal impact on the environment.

Exploring Non-Toxic Wood Sealers

So, what are some of the top non-toxic wood sealers on the market? Here’s a closer look at a few standout options:

1. Tung Oil

Extracted from the nut of the china wood tree, tung oil penetrates deeply into the wood and hardens upon exposure to air. This creates a clear, almost invisible, water-resistant finish, maintaining the wood’s natural character. Plus, it’s entirely non-toxic and food-safe, making it perfect for kitchen utensils or countertops.

2. Linseed Oil

Linseed oil, derived from flax seeds, is another fantastic non-toxic option. It provides a glossy finish that brings out the grain and warmth of the wood. It’s also easy to apply, requiring just a cloth and some elbow grease. However, remember to choose “raw” linseed oil, as some “boiled” versions can contain added chemicals.

3. Beeswax

Beeswax is non-toxic and offers a unique, creamy finish that few other sealants can match. It’s especially great for smaller items like cutting boards or toys. Melted beeswax can be easily applied with a cloth and dried to a soft, satin finish, enhancing the wood’s natural beauty.

4. Carnauba Wax

Carnauba wax is a plant-based product that’s often combined with other oils or waxes to make a more durable finish. It’s harder than most other waxes, offering excellent protection against scratches and spills. And of course, it’s non-toxic and safe for use.

5. Shellac

Shellac, derived from the secretions of a bug (yes, you read that right!), is a time-tested, non-toxic wood sealer. It dries quickly to a high-gloss finish and is easily repairable. However, it isn’t as durable as other options, so it’s best for pieces that don’t see heavy wear and tear.

DIY Methods for Natural Wood Sealing

For the hands-on folks, DIY natural wood sealing is a rewarding project. Here are a few methods you can try:

1. Beeswax and Mineral Oil Mix

Melt equal parts of beeswax and mineral oil in a double boiler, stirring until well combined.

Allow the mixture to cool slightly before applying with a clean cloth. Let it soak in, then buff for a beautiful, soft sheen.

2. Linseed Oil and Turpentine

Mix two parts linseed oil with one part turpentine for a powerful, penetrating sealer. Apply liberally with a brush, let it penetrate, then wipe off the excess.

3. Homemade Tung Oil Blend

Blend one part tung oil with one part citrus solvent for a potent, non-toxic sealer. Apply with a cloth, rubbing in the direction of the grain, and let dry.

When choosing a natural, non-toxic sealer, remember that every wood piece is unique and may respond differently to different sealers. Test your chosen sealer on a small, hidden area first to ensure it gives the finish you’re after.

Selecting the Ideal Natural Seal for Wood

Picking a natural sealant is not a one-size-fits-all affair. The best choice depends on your wood type, the item’s purpose, and your personal preferences. Let’s explore some key factors to consider:

1. Intended Use

Is your wood piece indoor furniture, an outdoor deck, or a kitchen cutting board? The item’s use will largely determine the type of sealant needed. For instance, food-grade sealants like beeswax or mineral oil are ideal for kitchen items.

2. Durability Requirements

High-traffic areas or frequently-used items require a durable finish. Hard-wearing options like tung oil or a carnauba wax blend might be more suitable.

3. Desired Finish

Do you prefer a glossy sheen or a matte finish? Different sealants offer different finishes, so consider your desired look when selecting a product.

4. Wood Type

Some woods, like oak or ash, have large pores and might require multiple sealant coats. Others, like maple or cherry, have tight grains and take well to thinner sealants.

A Glimpse at the Best Natural Seals for Wood

We’ve explored various natural, non-toxic sealants, from tung oil to shellac. Each offers unique advantages; the best choice will depend on your specific needs and preferences.

What is the Best Natural Seal for Wood?

The best natural sealant for wood often boils down to your specific circumstances. However, tung oil is hard to beat if you’re after a combination of durability, easy application, and a beautiful, natural finish.

Sealing Wood Without Changing Its Color

Opt for a clear or natural-colored sealant to preserve the natural color of the wood. Many oils, like linseed or tung oil, darken the wood slightly but maintain a natural tone.

Applying a light coat and wiping off the excess can also help to prevent color changes. Always test your chosen product on a small, inconspicuous area first to ensure it doesn’t alter the color.

Is There a Wood Sealer That Doesn’t Change the Color of the Wood?”

Yes, some sealants don’t change the wood’s color. Water-based polyurethane and certain acrylic sealants dry clear and won’t alter the wood’s hue. However, they may not be as natural or non-toxic as other options.

Achieving a Natural Finish: Step-by-Step Guide to Sealing Wood for a Natural Look

Sealing wood to achieve a natural finish is quite straightforward. Here’s a simple guide to get you started:

1. Prep the Surface

Start by sanding the wood to a smooth finish. Begin with coarse-grit sandpaper and gradually move to finer grits for a sleek, scratch-free surface.

2. Clean the Wood

Wipe off any dust using a damp cloth. Ensure the wood is clean and dry before you apply the sealant.

3. Apply the Sealant

Apply a thin sealant layer using a clean, soft cloth or a brush. Always go along with the wood grain for a smoother finish.

4. Let It Dry

Allow the sealant to penetrate and dry. Drying times can vary depending on the sealant type and the wood’s porosity.

5. Buff the Surface

After completely drying the sealant, buff the surface with a clean cloth for a beautiful, natural sheen.

6. Repeat if Needed

You might need to apply multiple coats depending on the desired finish and the wood type. Just make sure each layer is fully dry before applying the next.

Tips to Maintain the Natural Look and Dodge Yellowing

To keep the natural look and avoid yellowing over time, consider these tips:

  1. Choose the Right Sealant: Opt for a sealant that offers UV protection. UV rays can cause clear finishes to yellow over time.
  2. Apply Thin Coats: Applying too much sealant can cause a yellowish hue. Stick to thin coats and wipe off any excess.
  3. Regular Maintenance: Regularly clean and dust the wood item. Reapply the sealant as needed to maintain the finish.

How Do You Seal Wood but Keep the Natural Look?

To maintain the wood’s natural look, use a clear or natural-colored sealant, apply thin coats, and buff well after each application. This enhances the wood’s natural beauty without significantly altering its color or texture.

Natural Wood Sealer: DIY Methods for Sealing Wood

Creating your own natural wood sealer can be rewarding if you’re a DIY fan or prefer a more hands-on approach. It lets you control exactly what goes into your sealant, offering peace of mind, especially for kitchen utensils or toys.

Detailed DIY Natural Wood Sealer Recipe

Here’s a simple, effective recipe for a DIY natural wood sealer using just two ingredients – beeswax and mineral oil.


  • 1 part beeswax
  • 4 parts mineral oil


  1. Melt the Beeswax: In a double boiler, gently melt the beeswax. If you don’t have a double boiler, use a heat-safe bowl set over a pot of simmering water.
  2. Add the Mineral Oil: Carefully stir in the mineral oil once the beeswax is fully melted.
  3. Combine Well: Stir the mixture well until it’s fully combined.
  4. Cool and Store: Allow the mixture to cool, then transfer it into a jar or tin for storage.

To use your homemade sealer, apply a thin layer with a cloth, let it penetrate, and then buff off any excess.

Tips for Crafting a Homemade Sealer

When creating a homemade sealer, remember these tips for the best results:

  1. Quality Ingredients: Use high-quality, food-grade beeswax and mineral oil, especially if you make a sealer for kitchen items or toys.
  2. Safe Melting: Beeswax is flammable, so always melt it using a double boiler or a similar safe method. Never leave it unattended on the stove.
  3. Proper Storage: Store your homemade sealer in a cool, dry place. It should last for a long time, especially if kept well-sealed.

How Do You Make Wood Sealers at Home?

Making a wood sealer at home is as simple as melting beeswax and mineral oil together in a double boiler, and then allowing the mixture to cool. Apply it with a cloth for a safe, natural finish.

Sealing wood is essential in preserving its beauty and extending its life. Natural, non-toxic sealants offer a safe, effective way to use a store-bought product or a DIY blend.

With the right sealant and application method, your wood items can maintain their natural charm and stand up to daily use, all while minimizing exposure to potentially harmful chemicals.

Application Methods for Different Types of Wood

There’s something uniquely satisfying about working with raw wood, taking a piece in its most natural state and transforming it into something functional and beautiful. However, sealing this raw wood is critical in preserving its natural beauty and ensuring its longevity.

How to Seal Raw Wood without Staining It

If you want to maintain the raw, natural color of the wood, sealing without staining is the way to go. For this, a clear penetrating oil like tung or linseed oil is an excellent choice. These oils soak into the wood fibers, harden, and provide a robust, durable finish that enhances the wood’s natural character without changing color.

Here’s a simple, step-by-step guide on how to seal raw wood without staining it:

  1. Prepare the wood: Start by sanding the surface of the wood. This helps to open up the wood pores, allowing for better penetration of the sealant.
  2. Apply the oil: Using a clean, lint-free cloth, apply the oil generously to the wood surface. Make sure to follow the grain of the wood when applying.
  3. Let it soak: Allow the oil to soak into the wood for 10-15 minutes.
  4. Wipe off excess: After the oil has soaked in, use a clean cloth to wipe off any excess oil that hasn’t penetrated the wood.
  5. Allow it to dry: Let the wood dry fully. This could take anywhere from 24 to 48 hours, depending on the oil used and the wood’s absorbency.
  6. Repeat if necessary: Depending on the wood type and desired finish, you may need to repeat these steps several times.

Guide on Sealing Unfinished Wood Tables

With their raw, rustic charm, unfinished wood tables are popular for many homes. Sealing them is a great way to enhance their natural beauty and protect them from stains, scratches, and everyday wear and tear.

Sealing an unfinished wood table is similar to the one described above. However, because tables often see more use (and abuse) than other wood items, you might want to consider a slightly more durable finish. A blend of beeswax and mineral oil can offer an extra protection layer while still providing a safe, non-toxic finish.

Tips for Sealing Raw Timber Furniture

Raw timber furniture, with its striking grains and textures, can be a real statement piece in any home. However, because of the varying densities and grain patterns found in different timbers, sealing them can sometimes be a bit challenging.

When sealing raw timber furniture, consider these tips:

  • Test the sealant: Different timbers can respond differently to various sealants. Always test the sealant on a small, inconspicuous area first to see how it reacts.
  • Consider the timber’s natural oils: Some timbers have natural oils that can interfere with the absorption of the sealant. Wipe down the timber with a cloth soaked in mineral spirits before applying the sealant to help neutralize these oils.
  • Seal all sides: To prevent warping, it’s crucial to seal all sides of the timber evenly.

Do you have to seal unfinished wood furniture?

Yes, sealing unfinished wood furniture is highly recommended. Unsealed wood is more susceptible to stains, scratches, and water damage. Sealing protects your furniture from these potential hazards and enhances the wood’s natural beauty, bringing out the grain and color truly stunningly.

Indoor vs. Outdoor Wood Sealing

When it comes to indoor furniture, you may wonder if sealing is necessary. After all, indoor pieces are less exposed to the harsh elements that outdoor furniture faces. However, sealing wood used indoors is still crucial.

Indoor wood is not immune to wear and tear. It can be susceptible to damage from spills, humidity changes, and daily use. A good sealant can prevent water stains, protect against scratches and dings, and keep your wood looking new and vibrant for longer.

Furthermore, a well-chosen sealant can enhance the natural beauty of the wood, bringing out its grain and richness of color. It can give your piece that finished look that sets professionally crafted furniture apart from the rest.

Overview of Exterior Natural Wood Sealer

When it comes to outdoor wood, the stakes are even higher. Here, wood is exposed to sun, rain, and dramatic temperature changes—all of which can wreak havoc on your piece if it’s not adequately protected.

Exterior wood sealers need to offer high-performance protection against these elements. Many non-toxic options on the market can deliver this level of protection. For example, sealants based on natural oils, like tung or linseed oil, are popular for outdoor wood as they offer robust protection and are safe for the environment.

Another noteworthy natural option for outdoor wood is a marine-grade sealant. These are often used on boats and are designed to withstand harsh weather conditions. Many of them are plant-based and non-toxic, offering superior protection without environmental harm.

Instructions for Outdoor Raw Wood Sealing

Sealing outdoor raw wood follows a similar process to sealing indoor wood. Here’s a step-by-step guide:

  1. Prepare the wood: Sand the wood surface to ensure it’s smooth and free of dirt or debris.
  2. Apply the sealer: Use a brush or cloth to apply the sealer, following the wood grain.
  3. Let it soak: Allow the sealer to penetrate the wood. This usually takes 10-15 minutes but may vary depending on the sealer used.
  4. Wipe off excess: Use a clean cloth to remove any excess sealer that hasn’t been absorbed.
  5. Let it dry: Allow the sealer to dry completely. Depending on the product used and the weather conditions, this can take anywhere from 24 hours to a few days.
  6. Apply additional coats: Depending on the type of wood and its exposure to the elements, you may need to apply multiple coats. Always allow the previous coat to dry fully before applying the next one.

Do you need to seal wood for indoor use?

Absolutely! While sealing wood for outdoor use might seem more crucial due to exposure to harsh elements, indoor wood also necessitates similar protection.

Indoor wood is susceptible to potential harm, such as accidental spills, scratches, and temperature fluctuations. Applying a sealant offers the requisite protection, safeguarding the wood and amplifying its natural beauty and durability.

Waterproofing Wood

Water can be one of the biggest enemies of wood. When wood absorbs water, it can warp, crack, or rot—a nightmare scenario for any woodworker or furniture owner. This is where waterproofing comes into play.

Waterproofing makes your wood impervious to water, ensuring its long-term health and stability. It’s especially crucial for pieces exposed to moisture regularly, like outdoor furniture or wooden items in high-humidity areas like the kitchen or bathroom.

How to Waterproof Wood at Home Without Chemicals

Waterproofing your wood doesn’t mean you must resort to harsh chemicals. Natural, non-toxic options can be just as effective. Here’s a simple process for waterproofing your wood naturally:

  1. Clean the Wood: Start by cleaning your wood thoroughly. Any dirt or dust can interfere with the waterproofing process. You can use a dry cloth for this purpose. If the wood is particularly dirty, lightly dampen the cloth, but make sure to dry the wood afterwards fully.
  2. Sand the Wood: Sanding is important because it opens up the wood’s pores, allowing the waterproofing agent to penetrate more deeply. You can use medium-grit sandpaper and then smooth it down with fine-grit sandpaper.
  3. Apply a Natural Waterproofing Agent: Natural oils like linseed and tung oils are excellent for waterproofing wood. Apply a generous amount of oil onto a clean, lint-free cloth and rub it into the wood, going along with the grain. Allow the oil to soak into the wood for 15-30 minutes.
  4. Wipe Off Excess: Once the oil has had a chance to penetrate the wood, use a clean cloth to wipe off any excess oil.
  5. Let it Dry: Allow the wood to dry completely. This can take 24-48 hours, depending on the type of oil used and the wood itself.
  6. Repeat the Process: It’s best to repeat this process 2-3 times for optimal waterproofing.

How can I waterproof wood at home?

You can easily waterproof wood at home using natural oils like linseed and tung oil. These oils penetrate the wood’s pores, creating a barrier that repels water.

Simply clean and sand your wood, apply the oil, let it soak in, wipe off the excess, and let it dry. Repeat the process for better results.


Wood, in its raw, natural state, has a unique appeal. However, sealing and waterproofing are essential to maintain its beauty and longevity.

Natural, non-toxic methods can provide excellent protection while being safer for you and better for the environment.

As you embark on your woodworking journey, remember to seal, protect, and treasure each piece you create.

Each piece of wood carries a story of growth, transformation, and enduring beauty, and it is your responsibility to ensure that story continues for as long as possible.

The care and effort you put into sealing and preserving your wood pieces not only enhance their beauty, but also make them pieces to be cherished for generations to come.

Frequently Asked Questions

What is the safest sealer for wood?

For the utmost safety, especially for items like children’s toys or kitchen utensils, consider using a food-safe sealant like a beeswax and mineral oil blend.

Can I make a homemade wood sealer?

Absolutely! A simple mix of beeswax and mineral oil creates a safe, effective sealer. Remember to use food-grade ingredients when using the sealer on kitchen items or toys.

How often should I reapply a natural wood sealer?

This largely depends on the item’s use and the type of sealant. You may need to reapply the sealant as often as every few months for high-use items. Less used items might only need a fresh coat once a year.

Does sealing wood make it waterproof?

While sealing wood doesn’t make it 100% waterproof, it significantly improves water resistance. This can help prevent water stains, warping, and other moisture-related damage.