10 Best Waterproof Wood Sealers 2025 in the United States

The Ready Seal 512 is an oil-based exterior stain and sealer designed for wood surfaces, available in a 5-gallon pail of Natural Cedar color. One of its key strengths is the ease of application; it requires no primer, back brushing, or wet-line application, and it self-blends, making it 'goof proof.' This makes it an excellent option for DIY enthusiasts or those who might not have much experience with wood sealers. The ability to apply it using a sprayer, roller, or brush adds to its versatility.

You can also apply it in any temperature range, which is convenient for varying climates and conditions. Another advantage is that it provides UV protection, helping to preserve the color and integrity of the wood over time. It reaches its true color in about 14 days, which is relatively quick, and the flat finish gives a natural look to the wood.

However, its oil-based composition might be a drawback for those who prefer water-based products due to environmental concerns or easier cleanup. It also can't be applied over painted or newly stained surfaces, which could limit its use in some scenarios. Despite these minor drawbacks, it performs well for most users.

Ready Seal 120 Redwood Exterior Stain and Sealer is an oil-based wood sealer designed for outdoor use, providing a flat finish that enhances wood’s natural look with a rich redwood tone. It stands out for its ease of application — you can use a sprayer, roller, or brush, and it doesn’t require primer, back brushing, or thinning. This makes it very beginner-friendly and reduces the chance of streaks or uneven spots. The product is also versatile because it can be applied in any temperature, which helps if you’re working outdoors in varying climates.

The sealer offers good protection against UV rays, mold, and mildew, helping wood last longer outdoors. Its color darkens initially but settles into its true shade over about two weeks, which is helpful to know for planning your project. One gallon covers around 125 square feet, making it suitable for medium-sized projects. On the downside, it’s not meant to be applied over painted or freshly stained surfaces, so prepping is important.

Also, since it’s oil-based, drying time can be a bit longer compared to water-based sealers. The flat finish means it won’t have a shiny look, which some may prefer for a natural appearance but others might find less vibrant. Ready Seal 120 is a dependable choice for someone who wants a straightforward, reliable sealer that works well with minimal fuss, especially for outdoor wood surfaces needing UV and mildew resistance.

Ready Seal 125 in Dark Walnut is an oil-based wood stain and sealer designed for exterior wood surfaces. It stands out for its ease of use, often described as 'goof proof,' allowing application with a sprayer, roller, or brush without the need for primer or thinning. This makes it a solid choice for those who want a hassle-free staining experience. The product self-levels during application, which helps avoid streaks, laps, or runs, and it can be applied in any temperature, giving flexibility for outdoor projects.

In terms of finish, it offers a matte look that develops from a darker initial shade to its true color over about two weeks. Coverage is decent at about 125 square feet per gallon, which is typical for this category. The sealer combines staining and sealing functions, which means it helps protect wood from moisture while enhancing its appearance. It should not be used over painted or recently stained surfaces as it can block penetration, indicating a limitation if recoating already treated wood.

Drying time details are not explicitly stated, but the color settling period is about 14 days, so some patience is needed. The product is also subject to recycling fees in certain states, which may affect cost slightly. For those seeking a straightforward, no-fuss wood sealer that combines stain and seal with an easy application process, Ready Seal 125 is a good option, keeping in mind the noted surface preparation considerations.