10 bestDeck Water Sealerof July 2025
112M consumers helped this year.
1
Liquid Rubber Polyurethane Deck Coating – 10X Stronger Than Traditional Deck Paint & Deck Stain – Flexible, Waterproof Sealant for Wood, Concrete & Plywood – Textured Finish – Neutral Beige – 1 Gallon
Liquid Rubber
9.8
2
SEAL-ONCE MARINE - 1 Gallon Penetrating Wood Sealer, Waterproofer & Stain. Water-Based, Ultra-low VOC formula for high-moisture areas to protect wood docks, decks, piers & retaining walls.
Seal-Once
9.6
3
Ready Seal 505 5-Gallon Pail Light Oak Exterior Wood Stain and Sealer
Ready Seal
9.4
4
DEFY Extreme Semi-Transparent Outdoor Wood Stain and Sealer in One, Light Walnut, 5 Gallon - Fence Stain, Deck Stain and Sealer for All Wood Types
DEFY
9.1
5% off
5
Ready Seal Stain & Sealer for Wood, Outdoor Deck and Fence - All-in-One Exterior Wood Stain and Waterproofing Sealant – Easy to Apply, No Back Brushing Needed, with UV Protection - 1 Gallon, Redwood
Norkan, Inc.
8.8
OtherUp to 8% off
CLARK'S Soapstone and Concrete Sealer - Natural Beeswax and Carnauba Wax Blend - Ideal for Countertops and Slate Surfaces - Concrete Countertop Wax - Carnauba Wax Food Grade - Large - 32 oz
1 gal Ready Seal 145 Burnt Hickory Ready Seal Exterior Stain and Sealer For Wood
Thompson’s WaterSeal Multi-Surface Waterproofer Stain, Clear, 1 Gallon
Thompson’s WaterSeal Transparent Waterproofing Wood Stain and Sealer, Natural Cedar, 1 Gallon
6
Composite Deck Sealer by DEFY Wood Stain
DEFY
8.6
7
Ready Seal 510 5-Gallon Pail Golden Pine Exterior Wood Stain and Sealer
Ready Seal
8.3
8
Ready Seal 100 Clear, 1-Gallon Exterior Wood Stain and Sealer, 1 gallon (Packaging may vary)
Ready Seal
8.0
9
Cabot Australian Timber Oil Wood Stain and Protector, Mahogany Flame, 1 Gallon
Cabot
7.7
10
SEAL-ONCE Nano Penetrating Wood Sealer & Stain - 1 Gallon. Water-Based, Low-VOC waterproofer for Fences, siding, Beams, Outdoor Furniture & Log Homes.
Seal-Once
7.4
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A Guide to Selecting the Best Deck Water Sealer
Choosing the right deck water sealer is important to protect your outdoor wood surfaces from moisture, sun, and wear. A good sealer helps prevent wood from rotting, warping, or fading, and can extend the life and appearance of your deck. When shopping for a deck water sealer, it's important to understand the different types and features so you can match the product to your specific needs and the conditions your deck faces.
Type of Sealer
Deck water sealers generally come in three main types: clear sealers, semi-transparent sealers, and solid (opaque) sealers. Clear sealers provide basic water protection while allowing the natural wood grain to show through, but they offer minimal UV protection. Semi-transparent sealers add a hint of color and provide better UV protection while still showing some wood grain. Solid sealers act more like paint, covering the wood grain but offering the best protection against sun and moisture. Your choice depends on how much you want to change the look of your deck and how much protection you need. If you want to keep the natural look, go for clear or semi-transparent; if your deck is older or you want maximum protection, consider a solid sealer.
Water Repellency
Water repellency refers to how well the sealer prevents water from soaking into the wood. This is crucial because water can cause wood to swell, crack, or rot over time. Sealers are rated for their ability to repel water, often described as 'waterproof' or 'water-resistant.' For decks exposed to heavy rain or humidity, look for a sealer with high water repellency. If your deck is in a drier climate, a moderate level may be sufficient.
UV Protection
UV protection in a deck sealer helps prevent the sun's rays from fading or damaging the wood. Over time, UV exposure can cause wood to turn gray and weaken. Some sealers include UV-blocking ingredients, which are especially important if your deck gets a lot of direct sunlight. If your deck is shaded or covered, UV protection is less critical, but for sunny spots, prioritize a sealer with strong UV resistance.
Application Method
Deck sealers can be applied with brushes, rollers, or sprayers. Some are easier to apply than others, depending on their thickness and formulation. Thinner, water-based sealers are usually easier to work with and clean up, while thicker, oil-based sealers may require more effort but can offer longer-lasting protection. Consider your comfort with DIY projects and the size of your deck when choosing a sealer that matches your preferred application method.
Drying and Curing Time
Drying and curing time refers to how long it takes for the sealer to be safe to walk on and fully protective. Some sealers dry in a few hours, while others may take a day or more. If you need to use your deck soon after sealing, look for a fast-drying product. For the best results, always follow the manufacturer's instructions regarding drying and curing times.
Longevity and Maintenance
Longevity is how long the sealer will last before you need to reapply it. Some sealers need to be reapplied every year, while others can last several years. If you prefer less maintenance, look for a long-lasting sealer. However, keep in mind that decks with heavy foot traffic or harsh weather exposure may need more frequent resealing, regardless of the product.
Environmental Friendliness
Some deck sealers are formulated to be more environmentally friendly, with low volatile organic compounds (VOCs) and safer ingredients. If you are concerned about fumes, pets, or the environment, look for water-based sealers with low VOCs. These are generally safer to use and have less odor, but may require more frequent application compared to some oil-based options.
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