How to Waterproof Painted Wood Furniture for Outdoors

Beautifully painted wooden furniture can add charm and personality to any outdoor space. However, protecting these pieces from the elements is essential to maintain their appearance and structural integrity.

Furniture outdoors must be properly protected from Outdoors substances such as rain, snow, and ice that can easily penetrate your wooden furniture, causing moisture that eventually destroys your wood piece.

It is crucial to have properly finished furniture that will give a layer of protection against bad elements. It is possible to make the outdoor furniture that you have painted to become waterproof so that it will be long-lasting.

In this article, we’ll explore the Importance of waterproofing painted wood furniture for outdoor use, the benefits of using waterproof sealers, and a step-by-step guide to the waterproofing process.

Benefits of Using Waterproof Sealers on Painted Wood Furniture

Protection from moisture damage: Sealing your furniture with a waterproof sealer keeps moisture from penetrating the wood, preventing swelling, warping, and rot.

Enhanced durability: Waterproof sealers add an extra layer of protection, increasing the furniture’s resistance to wear and tear.

UV resistance: Some sealers contain UV inhibitors, which help maintain the paint’s color and prevent fading from sun exposure.

Easy maintenance: With a protective sealer, your furniture is easier to clean, and you won’t need to repaint it as frequently.

Materials Needed for Waterproofing Painted Wood Furniture

Waterproof Sealer Options

Numerous sealers are available on the market, each with unique properties and benefits. Choosing the right sealer for your specific needs and furniture type is essential. Some of the most popular options include:

Best Waterproof Sealer for Painted Wood: A high-quality acrylic sealer, such as the Rust-Oleum Clear Top Coat, is an excellent choice for painted wood furniture, as it provides a durable, waterproof barrier while allowing the paint’s color and texture to shine through.

Waterproof Sealer for Painted Wood: A water-based polyurethane sealer, like Minwax Polycrylic Protective Finish, is an effective option for sealing painted wood furniture. It dries quickly, doesn’t yellow over time, and protects against water damage.

Best Sealer for Outdoor Painted Wood: Marine-grade varnish, such as Epifanes Clear Varnish, is specifically designed for outdoor use and offers superior UV protection and water resistance.

Identifying the Best Paint for Exterior Wood Sealing

The type of paint you use on your outdoor furniture can also impact its durability and longevity. Look for paints labeled as exterior-grade, which are designed to withstand harsh outdoor conditions. Some popular exterior wood paint brands include:

Sherwin-Williams: This brand offers an extensive range of outdoor paint options, including their SuperPaint Exterior Acrylic Latex and Duration Exterior Acrylic Coating, both of which provide excellent adhesion, UV resistance, and water resistance.

Benjamin Moore: The Aura Exterior and Regal Select Exterior lines from Benjamin Moore offer exceptional durability, color retention, and resistance to fading, chalking, and mildew.

Paint Sealers Designed for Wooden Furniture

When selecting a sealer for your painted wooden furniture, choosing one specifically designed for this purpose is essential. Some popular options include:

General Finishes High-Performance Water-Based Topcoat: This topcoat is formulated to provide excellent protection for indoor and outdoor furniture. It’s UV-resistant, non-yellowing, and available in various sheens to suit your desired finish.

Varathane Water-Based Spar Urethane: This clear, water-based urethane is suitable for both indoor and outdoor furniture. It offers excellent UV protection, water resistance, and a smooth, durable finish.

Polyurethane Sealers Ideal for Painted Wood

Polyurethane sealers are another excellent option for protecting your painted wood furniture. These sealers form a hard, durable coating that resists water, wear, and UV damage. Some top-rated polyurethane sealers include:

Minwax Helmsman Spar Urethane: This oil-based spar urethane is designed for outdoor use and provides exceptional protection against moisture, temperature fluctuations, and sunlight.

Rust-Oleum Varathane Triple Thick Polyurethane: This water-based polyurethane is three times thicker than traditional sealers, providing excellent durability and protection with fewer coats.

Water Seals for Painted Surfaces

Water sealers are specifically designed to protect surfaces from water damage. They are typically clear and can be used on various materials, including painted wood. Some popular water seal products for painted surfaces include:

Thompson’s WaterSeal Advanced Natural Wood Protector: This water-based sealer offers long-lasting protection against water damage and UV rays while maintaining the natural beauty of the wood.

Olympic WaterGuard Clear Wood Sealer: This sealer provides excellent water resistance and UV protection while maintaining the wood’s natural appearance.

Exploring Outdoor Paint Options

In addition to sealing your painted wood furniture, you may also want to consider using outdoor-specific paint for added protection. These paints are designed to withstand the elements and provide a durable, long-lasting finish. Some popular outdoor paint options include:

Sherwin-Williams Outdoor Paint: Sherwin-Williams offers a range of high-quality outdoor paints, such as their SuperPaint Exterior Acrylic Latex and Duration Exterior Acrylic Coating, which provide excellent water resistance, UV protection, and durability.

Behr Premium Plus Exterior Paint: This paint line from Behr offers excellent adhesion, UV resistance, and water resistance, ensuring your painted wood furniture stays protected and looks great.

Preparing the Surface for Waterproofing

The first step in preparing your painted wood furniture for waterproofing is thoroughly inspecting the piece. Look for any signs of damage, such as peeling or chipping paint, cracks, or rot. Next, clean the furniture by wiping it down with a damp cloth to remove any dirt, dust, or debris. Allow the furniture to dry completely before moving on to the next step.

Repairing and Fixing Paint Problems

How to Fix Paint Problems on Painted Wood Furniture Before Waterproofing? If you notice any paint issues, such as peeling or chipping, it’s crucial to address them before waterproofing.

Observe imperfections or paint flaws to fix your old outdoor wood furniture. The imperfection on your furniture is a pathway for water to inrush and eventually damage your outdoor furniture.

Here are the methods to inspect your painted outdoor furniture:

• First, examine your furniture carefully and look for cracked, bubbled, or chipped paint.
• Put your furniture on top of plastic sheeting or drop cloth.
• Wear a respirator and goggles for safety measures.
• Scrape off all damaged paint using a paint scraper. When scraping, try to keep the paint chips from falling on the plastic sheeting or drop cloth to make the safe removal easier.
• Use sandpaper for sanding all the areas where your wood is exposed. This aims to make a smooth transition between wood and paint.
• Use a damp rag to clean up any leftover dust. After that, leave the furniture to dry.
• When disposing of the paint, follow the guidelines from EPA or your local regulations, especially if the paint scrapings are lead-based.

Sanding and Smoothing the Surface

• To ensure proper adhesion of the waterproofing product, you’ll need to sand the furniture’s surface.

• Using fine-grit sandpaper, gently sand the entire piece, paying close attention to any rough spots or imperfections.

• Wipe the furniture down with a tack cloth to remove any sanding dust, and then you’re ready to begin the waterproofing process.

Waterproofing Techniques for Painted Wood Furniture

Waterproofing Using Oil-Based Paint

A paint that is oil-based type is generally used as a sealer for outdoor furniture. This paint can defend from moisture well and give a classic glossy appearance.

The downside of oil-based paint is that it takes more time to dry. High humidity or a low-temperature level can also affect the dry time. Typically, paint with oil-based type requires at least a day (24 hours) to dry.

Oil-based paint can give waterproofing ability. However, you need to apply at least two polyurethane coatings after the paint dries.

This will give an additional protection layer to defend from water that can cause damage to your wood.

When oil-based paint is in the drying process, it also releases moisture. That’s why you need to wait for the paint to cure properly.

If you apply polyurethane before the furniture is fully cured, then cracking and peeling may occur because moisture is trapped under a polyurethane coat.

This case often happens when water-based polyurethane is applied on top of oil-based polyurethane.

How To Waterproof Painted Wood Furniture For Outdoors Using Oil-Based Paint

Here are the instructions to make your freshly painted wooden furniture waterproof:

• First, ensure that you have given your furniture adequate time to properly cure.
• After you are sure that your wood piece has cured, it’s time to sand your furniture. Sand your wooden furniture lightly using a fine grit level of sandpaper. Sanding is needed to help the polyurethane to be able to adhere properly when applied over the oil-based paint that is already cured.
• If possible, you can apply polyurethane in a protected area. This will lessen the risk of debris and dust damaging your finish. This can also allow for anticipated dry times.
• After that, you need to prepare your wooden surface to be ready to receive polyurethane. Use mineral spirits moistened on a lint-free cloth. Then, use the cloth to clean all of the areas.
• Then after you are done applying the mineral spirits, now leave the surface to dry.
• Now. Apply polyurethane to your wooden surface in a thin and even coat.
• Allow the polyurethane solution to cure. Read the instructions from the manufacturer to know how long it takes to cure.
• Use sandpaper and sand it lightly, then wipe down the furniture before starting to apply a second polyurethane coat.
• Apply a second coat of polyurethane.
• Adding additional coats to your furniture may be necessary depending on your chosen polyurethane and the environment.
• When your polyurethane coats have cured, now your furniture will become waterproof.

Waterproofing Using Water-Based Paint

For your information, water-based paint is generally not preferred for outdoor furniture.

This is because water-based paint in the early formulations had little durability outdoors and was more prone to damage caused by heat and water.

However, as the technology to manufacture water-based paints has improved, so is their durability. Now it is possible to create long-lasting outdoor furniture using water-based paint.

If you want to turn your freshly coated outdoor furniture waterproof using water-based paint, here are the instructions:

• Firstly, ensure that the paint is not gooey or tacky and has hardened well.
• Gently scrape off the paint surface using a fine-grit level of sandpaper.
• If possible, move your furniture to a temperature-controlled and dust-free place.
• Take a lint-free cloth and dampen it with water. Then, use that lint-free cloth to clean up all grease, dust, and oil from the water-based paint surface.
• Leave your wooden surface to dry.
• After that, apply polyurethane with a thin layer using long and even strokes.
• Let the poly cure be based on the recommendation from the manufacturer.
• Sand using fine grit sandpaper gently, then clean away dust using a damp cloth.
• Wait for your furniture surface to be completely dried.
• Proceed to paint the second coat of poly.
• It may be required to apply more coats depending on the chosen polyurethane and your environment.

Applying Waterproof Sealer

Can I Use Thompson’s Water Seal on Painted Wood? Yes, Thompson’s Water Seal can be applied to painted wood surfaces.

This product protects wood from water damage while allowing the paint’s color and texture to shine through. Follow the manufacturer’s instructions for proper application and drying times.

Steps to Waterproof Painted Wood Furniture

Application Techniques

• Choose the appropriate waterproof sealer for your furniture, considering factors such as paint type and outdoor conditions.
• Stir the sealer well before applying.
• Use a high-quality brush or roller to apply a thin, even coat of sealer, working in the direction of the wood grain.
• Allow the sealer to dry according to the manufacturer’s instructions, typically between 2-4 hours.
• Apply additional coats, if necessary, for optimal protection. Be sure to let each coat dry before applying the next one.

Drying and Curing Time

After applying the waterproof sealer, it’s crucial to allow adequate drying and curing time before using or exposing the furniture to the elements. This ensures the sealer forms a strong, protective barrier on the surface of the painted wood.

Drying Duration for Thompson’s Water Seal

Thompson’s Water Seal typically requires 24 hours of drying before it can withstand rain. However, this can vary depending on factors such as temperature and humidity. Always refer to the manufacturer’s instructions for specific drying times and recommendations.

Restoring and Waterproofing Old Painted Wood Furniture

Maybe you have bought great patio furniture at a yard sale, and the style is great. However, the paint is in bad condition.

It is important to fix the damaged paint on your furniture before placing it outdoors since moisture can penetrate through that damaged paint and caused fungus, rotting, and mold.

Follow the steps below carefully to restore your furniture and make it waterproof.

Needed Supplies for Restoring Old Painted Furniture

When restoring and waterproofing old painted wood furniture, gather the following supplies:

• Protective gloves and eyewear
• Paint scraper or putty knife
• Wood filler
• Sandpaper with a medium level of grit (#80) and sanding block
• Tack cloth
• High-quality paintbrush or roller
• Outdoor-compatible paint or sealer
• Exterior Primer
• Clean, lint-free cloth

Evaluating the Condition of Existing Paint

Before you begin the restoration process, evaluate the condition of the existing paint on your old wood furniture. Look for signs of wear, such as peeling, chipping, or fading.

If the paint is in poor condition, it must be removed and the surface prepared for repainting and waterproofing.

Removing Old Paint and Preparing the Surface

• Wear protective gloves, goggles, and a mask to avoid exposure to dust and paint particles.
• Use a paint scraper or putty knife to remove loose or peeling paint from the wood furniture.
• Fill any cracks or holes with wood filler, following the manufacturer’s instructions. Allow the filler to dry completely.
• Sand the entire furniture surface using fine-grit sandpaper to smooth out any imperfections and rough spots.
• Wipe the furniture down with a tack cloth to remove sanding dust.

Repainting and Waterproofing

• Choose a paint specifically designed for outdoor use and compatible with your wood furniture.
• Stir the paint well to ensure even pigment distribution.
• Apply a thin, even coat of paint using a high-quality brush or roller, working toward the wood grain. Allow the paint to dry according to the manufacturer’s instructions.
• Apply additional coats as needed for full coverage and protection.
• Allow the paint to dry and cure completely before applying a waterproof sealer.
• Choose a waterproof sealer compatible with your paint and designed for outdoor use. Stir the sealer well before applying.
• Apply the sealer using a high-quality brush or roller, working toward the wood grain. Allow the sealer to dry according to the manufacturer’s instructions.
• If necessary, apply additional coats of sealer for optimal protection, allowing each coat to dry before applying the next one.

Sealing Techniques for Outdoor Painted Wood Furniture

Sealing White-Painted Furniture

White-painted wood furniture adds a touch of elegance and brightness to any outdoor space. To maintain its pristine appearance, it’s crucial to seal the painted surface properly. Here are some steps to follow:

• Clean the furniture thoroughly to remove any dirt or debris.
• Lightly sand the surface to remove any imperfections and ensure proper sealer adhesion.
• Apply a clear, UV-resistant sealer designed for outdoor use, following the manufacturer’s instructions.

Protecting Painted Wood for Outdoor Use

Protecting painted wood furniture for outdoor use involves several key steps:

• Choose a high-quality paint specifically designed for outdoor use.
• Apply the paint in thin, even coats, allowing sufficient drying time between coats.
• For added protection, seal the painted surface with a waterproof sealer, such as a clear polyurethane or acrylic sealer.

Securing Painted Wood Furnishings

To secure painted wood furnishings against the elements, follow these steps:

• Inspect the furniture for any damage or wear, repairing as necessary.
• Clean the surface thoroughly and allow it to dry completely.
• Following the manufacturer’s instructions, apply a waterproof sealer for added protection against the elements.

Outdoor Paint Sealers for Wood

Outdoor paint sealers protect wood furniture from weather, UV rays, and other outdoor elements. Some popular options include:

• Clear polyurethane: Offers excellent durability and water resistance.
• Spar urethane: Designed specifically for outdoor use, providing superior UV protection and water resistance.
• Acrylic sealer: Provides a flexible, water-resistant finish.

Maintenance and Care for Waterproof Painted Wood Furniture

Regular maintenance is crucial for ensuring the longevity and durability of your painted wood furniture. This includes routine cleaning, inspecting for damage, and reapplying waterproof sealer as needed.

To ensure the longevity and durability of your outdoor painted wood furniture, follow these tips:

• Regularly clean the furniture with mild soap and water, using a soft cloth or sponge.
• Inspect the furniture for any signs of damage or wear, repairing as necessary.
• Reapply a waterproof sealer every few years, or as recommended by the manufacturer, to maintain optimal protection.

Thompson’s Water Seal Product Information

How Long Does Thompson Water Seal Last in the Can?

An unopened can of Thompson’s Water Seal typically has a shelf life of 3 to 5 years. Once opened, it’s best to use the product within one year for optimal performance.

Can You Use Thompson’s Water Seal Indoors?

Thompson’s Water Seal is primarily designed for outdoor use. However, it can be used indoors on surfaces that may be exposed to moisture, such as window sills and bathroom woodwork. Always ensure proper ventilation when using the product indoors.

Thompson’s Water Seal Application Techniques

Using a Paint Sprayer for Thompson’s Water Seal

A paint sprayer can be used to apply Thompson’s Water Seal, providing a quick and even application. Be sure to follow the manufacturer’s instructions for proper use and cleanup.

Applying Thompson’s Water Seal with a Paintbrush

A paintbrush is a common method for applying Thompson’s Water Seal. Use a high-quality brush and apply the sealer in thin, even coats, working toward the wood grain. Allow each coat to dry according to the manufacturer’s instructions before applying additional coats, if necessary. Be sure to clean the brush thoroughly after use.

Clear Exterior Paint Sealer and Clear Top Coat Paint for Wood Options

Several clear exterior paint sealer and top coat options are available for protecting your painted wood furniture. Some popular choices include:

Clear polyurethane: A durable and water-resistant option with a glossy or satin finish.

Spar urethane: Designed for outdoor use, it offers superior UV protection and water resistance.

Acrylic sealer: A flexible and water-resistant finish that is available in various sheens.

Frequently Asked Questions about Waterproofing Painted Wood Furniture

Final Thoughts

Proper waterproofing is essential for the beauty and durability of outdoor painted wood furniture.

It involves selecting high-quality outdoor paint, applying a waterproof sealer, and sealing the painted surface with a clear polyurethane, spar urethane, or acrylic sealer.

Regularly maintain the furniture by cleaning, inspecting it for damage, and reapplying the waterproof sealer.