Is Spray Paint On Wood Waterproof? 

Last Updated on August 17, 2023 by Ernest Godia

Spray paint can be a fantastic way to add color and personality to various surfaces. But is spray paint on wood waterproof? What about its durability? How will your spray paint job hold up against weather elements?

Moisture and wetness can cause molds and rot, so protection against water damage is essential for both indoor and outdoor wood. When choosing a finish for your wood surfaces, it is inevitable to consider whether it will seal and protect them from weather damage.

Read on for a detailed discussion of the common types of waterproof spray paints, water-resistant spray paints, and some weatherproof ones. We will also provide tips for applying and waterproofing spray paint.

But first…

What is spray paint?

Spray paint, also known as aerosol paint, is a type of paint stored in a pressurized sprayer can and applied by depressing a nozzle. 

The sprayer uses compressed gas to atomize the paint, which allows it to be applied in a fine mist. This makes it a great way to paint large surfaces or to get into hard-to-reach places.

Generally, spray paint consists of four key ingredients: pigments, binders, solvents, and propellants. 

Pigments give spray paint its color, while binders hold the pigments together. Solvents allow the paint to flow out of the can, while propellants create pressure for spray application. 

Like regular paint and other aerosol products, spray paints require careful handling to avoid harmful side effects.

Is spray paint waterproof?

The answer to this question depends on the specific brand, spray paint type, and the painted surface. 

Some spray paints are formulated to be water-resistant or water-repellent. This means they can withstand exposure to moisture to a certain extent, but they are not completely waterproof. 

Other spray paints are specifically designed to be waterproof. These paints create a durable and long-lasting finish that can withstand exposure to water without fading, peeling, or cracking.

Still, proper surface preparation and application techniques can determine the overall waterproofing capability of the paint.

What makes spray paint waterproof on wood?

The factors that make spray paint waterproof can vary substantially depending on the specific brand and type of paint. However, some common factors that contribute to spray paint’s waterproofness include:

• The type of binder used in the paint: Different binders have different properties, and some are more water-resistant than others. For example, polyurethane binders are more water-resistant than acrylic binders.
• The presence of additives such as sealants or resins: Additives such as sealants or resins can be included in the spray paint formula to improve its waterproofness. These additives form a protective layer over the paint, which helps to prevent water from seeping through.
• The thickness and evenness of the coating applied: A thicker coating will provide more protection from water, while an uneven coating is more likely to crack or peel, allowing water to seep through.

How to tell if spray paint is waterproof on wood

Here are a few ways to determine whether spray paint is waterproof.

1. Check the product label: Look for any indications or claims on the spray paint can itself. Some brands may explicitly state that the paint is waterproof or water-resistant.
2. Check the ingredients: If you see polyurethane and epoxy listed on the label, the paint has decent weatherproofing abilities.
3. The finish of the spray paint can indicate whether it is waterproof. If the finish is glossy, it is more likely to be water-resistant. Such finishes are more durable and less likely to chip or peel.
4. Perform a test: Spray a small amount of the paint onto a non-porous surface and let it dry completely. Then, expose the painted area to water or submerge it in water for 10–15 minutes. If the paint holds up well to the water exposure, it is likely waterproof or water-resistant. 

Is Rustoleum Spray Paint Waterproof on Wood?

Yes, Rust-Oleum spray paint is popular for its waterproof and water-resistant properties. Most Rust-Oleum spray paints are designed to create a protective barrier that helps prevent water penetration, helping to guard against rust and deterioration. 

However, it’s always a good idea to check the specific product label or Rustoleum’s official website for any specific instructions or claims regarding waterproofing capabilities.

Can You Use Rustoleum Spray Paint on Wood?

Yes, you can use Rustoleum spray paint on wood. However, it is important to choose a paint that is specifically designed for use on wood. Rustoleum makes various spray paints designed for wood, including their Rust-Oleum Painter’s Touch 2X Ultra Cover Primer and Paint.

Common Types of Waterproof Spray Paints for Wood

There are different types of waterproof spray paints available. Some of the most popular ones include:

1. General-Purpose Spray Paint

This is a versatile, water-resistant spray paint typically used for everyday applications. It is graded for use on various surfaces, including metal, wood, plastic, vinyl, glass, and ceramic.

General-purpose spray paint makes an excellent choice for DIY projects that need a quick and easy finish, such as painting furniture or toys.

2. All-Surface Spray Paint: Krylon Fusion All-In-One Spray Paint

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This type of spray paint is also designed for use on a variety of surfaces. Still, it is specifically formulated to adhere to difficult surfaces, such as plastic, metal, and fiberglass. 

Both hobbyists and professionals use it as a quick and effective way of completing paint projects that require a high level of protection indoors and outdoors. 

These spray paints are self-priming and have a decent degree of waterproofing. They may also cost slightly more than general-purpose spray paints.

3. Rust-Prevention Spray Paint: Rust-Oleum Gloss Spray Paint

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This spray paint is designed for rust prevention in industrial and general construction applications. 

The paint is reliable for protecting large metal surfaces during prolonged periods of exposure to the elements. It’s equally suitable for the momentary submersion of metal structures in still water.

Rust-prevention spray paint will prevent air-borne moisture particles from reaching the metal surface and causing rust. Unfortunately, it won’t prevent corrosion from occurring on the inside of a metal piece. 

4. Enamel Spray Paint

Enamel spray paint is a durable and versatile paint used for protecting surfaces against corrosion and wear. It is inherently waterproof and can withstand impact, heat, abrasion, moisture, and infestation.

Enamel spray paint is available in various finishes and textures, making it a good choice for various applications. Contractors and automotive engineers swear by the reliability and durability of this weatherproof spray paint.

5. Automotive Spray Paint

Automotive spray paints are designed to be exceptionally durable when protecting the integrity of vehicles from the elements. 

These spray paints are available in two main types: those used on the vehicle’s engine bay and the body panels.

• Engine bay spray paints are typically high-heat enamels that can withstand hot engine temperatures up to 200 degrees Fahrenheit.
• On the other hand, body panel spray paints are typically formulated with acrylic or urethane resins that are less durable but are more flexible and often protected by a thick clear coat.

6. Aircraft Spray Paint

Aircraft spray paint is another weatherproof spray paint. It contains single-use epoxy, enamel, or polyurethane formulas that are virtually immune to the effects of heat, UV light, water, static electricity, and impact. 

This type of paint is also very durable and guarantees it won’t crack, peel, or fade under the harsh conditions of flight. 

7. Rubberized Waterproof Spray Paint: Flex Seal Spray Sealant

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Rubberized spray paint forms a flexible and protective rubber-like coating that effectively seals out water. This paint is ideal for various applications, including waterproofing roofs, gutters, and other outdoor surfaces. 

8. Marine-Grade Spray Paint

Marine-grade spray paints are specifically designed to withstand harsh marine environments, including exposure to water, salt water, and UV rays. They are commonly used for waterproofing boat surfaces, docks, and other marine-related applications.

The Best Waterproof Spray Paints for Wood

When waterproofing your projects, choosing the right spray paint is essential. Here are two of the most reliable waterproof spray paints on the market.

Rust-Oleum Universal All Surface Spray Paint

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Rust-Oleum Universal All Surface Spray Paint is engineered to adhere to various surfaces, including metal, wood, plastic, and concrete, effortlessly.

Its ergonomic spray nozzle allows for comfortable and precise application, resulting in consistent coverage and a flawless finish.

Another cool feature of Rust-Oleum Universal All Surface Spray Paint is its advanced corrosion-resistant properties. This makes it an excellent choice for both indoor and outdoor applications

With a wide range of trendy colors and finishes available, this spray paint allows you to customize your surroundings according to your style and preferences

Pros:

• Versatile  
• Easy to use
• Water-resistant
• Fast-drying application
• Wide color variety

Cons:

• Strong fumes
• Unsuitable for extreme weather conditions

Krylon Colormaster Spray Paint

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The high-quality formulation of Krylon Colormaster Spray Paint ensures excellent coverage and a smooth, even finish. 

Its quick-drying formula allows you to complete your projects faster and reduces the risk of smudging or smearing. 

Krylon paints are versatile and have a primer and paint formulation. This formula helps it adhere effortlessly to various surfaces, including wood, metal, and plastic. 

The extensive color palette empowers you to experiment with different combinations and techniques, making each project unique. 

Pros:

• Versatile
• Vibrant color range
• Great coverage 
• Quick-drying formula
• Precise spraying

Cons:

• Multiple coats required
• Strong odor

How to choose the best waterproof spray paint for Wood

Here’s a general checklist for choosing the best waterproof spray paint for your project. 

• Purpose and Requirements: Clarify your project’s purpose and requirements to guide your spray paint selection.
• Surface Compatibility: Ensure that the spray paint you choose is formulated to adhere well to the surface you’ll be painting.
• Waterproofing Features: Consider the level of water protection you require based on your project’s intended use and exposure.
• Durability and Longevity: Look for products known for their resistance to chipping, cracking, and fading over time.
• Color and Finish Options: Consider the color and finish options available with the spray paint to ensure it matches your desired aesthetics.
• Budget: Set a budget that aligns with your project’s needs and explore options within that price range.

How to Apply Waterproof Spray Paints On Wood

Following the correct preparation, application, and finishing techniques is essential for optimal results when using waterproof spray paints.

Here are some general tips for applying waterproof spray paint:

Step 1: Surface preparation

Thoroughly clean the wood surface and ensure it’s dry and free of dirt, debris, and other contaminants that could affect paint adhesion.

Step 2: Application

Hold the spray can about 10 inches from the surface and spray the paint in a thin, even coat. Apply multiple paint coats, allowing each layer to dry fully before applying the next.

Step 3: Finishing

Once the final paint coat dries, add a layer of varnish or sealant to enhance the waterproofness of the paint further.

Does Waterproof Spray Paint Need to Be Sealed? 

No, waterproof spray paint does not necessarily need to be sealed. If you use high-performance spray paint, it can withstand heavy traffic and the elements. However, if you are using a lower-cost type of spray paint, sealing it can help to prevent premature deterioration.

Is acrylic spray paint waterproof?

Acrylic spray paint is water-resistant but not waterproof. It can withstand some water exposure but won’t hold up to prolonged exposure to water or moisture. Therefore, additional sealant or a clear coat may be required to protect it further and enhance its durability. 

Is spray paint permanent on wood?

Spray paint can provide a durable, long-lasting finish, but is not necessarily permanent. Over time, exposure to UV rays, moisture, and other elements can cause the paint to fade, crack, or peel. 

Still, if you need to remove spray paint from the surface at any point, you can use chemical removers, heat, or sandpaper to get it done.

How long does spray paint take to dry on wood?

Generally, spray paint will dry to the touch within 30 minutes to an hour. However, it may take several hours or even days to cure fully. Spray paint’s drying time can vary depending on the specific paint type and brand and the conditions in which it is applied.

How to make spray paint waterproof (tips for waterproofing spray paint on wood)

There are a few things you can do to make spray paint waterproof. These include:

• Use a waterproof spray paint: As mentioned earlier; many different waterproof spray paints are available on the market. These paints are designed to withstand harsh weather conditions and will not crack or flake.
• Apply a clear coat sealant: A clear coat sealant can be applied to any spray paint to make it more waterproof. This sealant helps protect the paint from the elements and extends its lifespan.
• Pretreat the surface: Before applying spray paint, it is important to pretreat the surface with a primer. This helps to create a barrier between the paint and the surface, making the paint more durable and waterproof.

While you’re at it, here’s what you need to remember:

1. Follow Manufacturer’s Instructions: Always read and adhere to the instructions provided by the spray paint and sealant/varnish manufacturers. This ensures proper application and drying times.
2. Test in a Small Area: Before applying the varnish or sealant to your entire project, test it on a small, inconspicuous area to ensure compatibility and desired results.
3. Apply Thin Coats: It is better to apply multiple thin coats of clear sealant or varnish than a single thick coat. Thin coats promote better adhesion and reduce the risk of drips or uneven coverage.
4. Allow Sufficient Drying Time: Patience is crucial when waterproofing spray paint. Allow each clear sealant or varnish coat to dry completely before applying the next or exposing the project to moisture.
5. Store Properly: Once your project is complete, store the remaining product in a cool and dry place to maintain the waterproofing integrity of the spray paint.

FAQs

Spray paint waterproofing: Is spray paint toxic?

Yes, spray paint is toxic because it contains volatile organic compounds (VOCs). However, it is safe to work with, provided you adhere to the safety precautions. Work in a well-ventilated area, wear a respirator, avoid contact with skin, and avoid inhaling the fumes.

What kind of paint is waterproof?

Several types of paint are specifically designed to be waterproof, including epoxy, marine, and waterproof masonry. These types of paint are formulated with special additives that form a hard, durable coating resistant to water, chemicals, and other elements. 

Does rain wash spray paint?

Yes, rain can wash away spray paint. The spray paint type, the paint’s thickness, and the weather conditions can affect how well it holds up against the rain. However, waterproof and properly sealed spray paints should withstand exposure to rain without significant damage. 

Does spray paint wash off with water?

Not all spray paint will wash off with water. Wet spray paint or paint that’s not fully cured will wash off with water. However, cured spray paint, waterproof paint, or properly sealed paint should hold up well against water or other liquids.

Is Spray Paint Waterproof On Wood? Final Thoughts

Spray paint can be waterproof, but it is not guaranteed for all spray paints, as discussed in the previous sections.

If you plan to use spray paint in an outdoor application, it is important to choose a waterproof variety. This will help protect your paint job from the elements. 

Still, if you only have access to water-resistant spray paints, you can reinforce their waterproof profile with a coat of sealants or varnishes.

I hope this blog post answered your questions about spray paint and its waterproofness. Have any questions or addition? Feel free to leave them in the comments, and we’ll be delighted to respond ASAP.