10 Best Cedar Deck Sealants 2026 in the United States

The Ready Seal 512 5-Gallon Pail Natural Cedar Exterior Stain and Sealer is an oil-based sealant designed for wood surfaces, specifically cedar decks. One of its notable strengths is ease of application, as it requires no primer, no back brushing, and can be applied with sprayer, roller, or brush. Its 'Goof Proof' application promises no laps, runs, or streaks, making it beginner-friendly. Additionally, it blends itself and can be applied in any temperature, eliminating the need for wet-line application.

For UV protection, the product is UV resistant, which is crucial for maintaining the wood's appearance and integrity over time. However, it is darkest when first applied and reaches its true color in approximately 14 days, which may require some patience from users. The sealant does not require diluting or thinning prior to spray applications, adding convenience. One potential drawback is that it cannot be applied over painted or newly stained surfaces, as sealed surfaces inhibit penetration. This could limit its use in some scenarios.

The finish is flat, which might not be ideal for users looking for a glossy or semi-gloss appearance. The product ranks well in customer reviews, with a 4.6 out of 5 stars rating based on 8,578 reviews, indicating strong consumer satisfaction. The Ready Seal 512 is a durable choice for those seeking an easy-to-use, UV-resistant sealant for their cedar decks, but its application restrictions and flat finish might not suit everyone's preferences.

The Seal-Once Marine Premium Wood Sealer is a versatile sealant that offers several benefits for those looking to protect their cedar decks. It functions as both a wood stain and sealer, making it convenient for users who prefer an all-in-one solution. The product provides strong UV protection, which helps in maintaining the wood's natural color over time, and its water-based formula is environmentally friendly, with ultra-low VOC levels. This makes it safe for use around pets, plants, and even in aquatic environments, which is a notable advantage for those with decks near water bodies.

Additionally, it offers excellent water resistance, forming a waterproof barrier that protects wood from moisture damage, crucial for outdoor furniture, boat docks, and similar structures exposed to the elements. The sealer's durability is enhanced by its ability to penetrate wood at a cellular level, providing long-lasting protection. However, the product's flexibility and breathability also mean it maintains the wood's natural look and feel without creating a thick, plastic-like layer.

Application is straightforward, as the sealer is fast-drying and allows for easy clean-up with soap and water. On the downside, the color choice is limited to Bronze Cedar, which might not be to everyone's taste. Despite this minor drawback, the Seal-Once Marine Premium Wood Sealer stands out as a reliable choice for those needing a robust, eco-friendly sealer for their cedar decks.

Ready Seal 112 Natural Cedar is an oil-based stain and sealer designed specifically for wood like cedar, making it a good choice for outdoor decks and other wood surfaces. One of its main advantages is that it requires no primer and can be applied easily with a brush, roller, or sprayer without back brushing. It blends well and doesn’t leave streaks, runs, or lap marks, which makes the application more forgiving – a big plus if you want a neat finish without hassle.

This product offers decent UV protection and is resistant to mold, mildew, and rain, which helps protect your wood from sun damage and moisture over time. It dries to a flat finish and reaches its true natural cedar color about two weeks after application, though it appears darker when first applied. The stain penetrates well but shouldn’t be used over painted or recently stained surfaces because it can block absorption.

In terms of durability, it performs well outdoors, maintaining its protective qualities through different weather conditions. The product is suitable for use in any temperature range, and it doesn’t require thinning before spraying, adding to its ease of use. The flat finish might not appeal if you prefer a shinier or more polished look. Also, since it’s oil-based, cleanup requires solvents rather than water, which could be a minor inconvenience. You should avoid using it on surfaces already sealed or painted, limiting its use to bare wood. If you want a straightforward, reliable stain and sealer that simplifies application and offers solid protection for your cedar deck or wood surfaces, Ready Seal 112 is a practical option to consider.