Does the wood on your deck look dull and weathered after just one season? You invest time and money into beautiful outdoor spaces—a sturdy picnic table, a cozy porch swing, or that perfect cedar fence—but nature works hard to break it down. Rain, harsh sun, and temperature swings are constantly attacking the wood fibers, leading to ugly graying, cracking, and rot.
Choosing the right outdoor sealer is the difference between a backyard that looks new year after year and one that constantly needs costly repairs. The sheer number of products available, from oils and varnishes to solid stains, can feel overwhelming. Which one actually protects against mildew? Which one won’t peel off in the first big storm? Understanding these choices is crucial for long-term protection.
This guide cuts through the confusion. We will break down exactly what makes a sealer effective, compare the top types available, and show you step-by-step how to choose the perfect shield for your specific wood project. Get ready to stop worrying about the weather and start enjoying your beautiful, protected outdoor living area.
Top Outdoor Sealer For Wood Recommendations
- Ready to use clear sealant and waterproofer
- Perfect for new wood, pressure-treated wood, weathered wood and wood with a weathered clear or semi-transparent stain
- Durable sealant that provides waterproofing protection
- Repels water
- Provides SUNBLOCK UV protection
- WATERPROOFING STAIN – Bring out the beauty of your outdoors with Thompson’s WaterSeal Clear Multi-Purpose Waterproof Stain. Proven to waterproof concrete, brick, exterior wood and other exterior surfaces.
- CLEAR STAIN – This outdoor wood stain and sealer provides a clear finish. It will hide the grain, but still allow the texture to show. It provides complete protection while adding enhancing the natural color.
- FADE RESISTANT FINISH – The advanced polymers in this outdoor wood and deck stain deliver fade-resistant color so it stays looking great year-round. The coating resists UV damage, so you can apply with confidence.
- EASY TO USE – Whether you’re refinishing an existing fence or putting the finishing touches on a new patio, this concrete, brick, wood sealer is easy to apply. Clean the surface thoroughly prior to use for best results.
- THOMPSON’S – Protecting & maintaining all your exterior surfaces, can easily be simplified if you know where to start. Thompson’s WaterSeal is here to take the edge off, thanks to our one-coat products, informative how-to guides & decades of expertise.
- Year-Round Protection in Just One Coat
- Helps Prevent Water Damage
- Exceeds Industry Standard ASTM-D4446 for Waterproofing Wood
- Crystal-clear sealer and sunblock protects wood and prevents yellowing
- 🌱 UNLEASH THE BEAUTY OF YOUR OUTDOOR WOOD WITH TEAK OIL: Our premium wood finish and sealer is specially formulated for outdoor furniture, providing waterproof protection and enhancing the natural color and structure of teak, mahogany, pine, beech, oak, and other wood types. Preserve and beautify your outdoor wood with confidence.
- 🌱 EASY APPLICATION FOR PROFESSIONAL RESULTS: Our wood oil is easy to apply with a brush or cloth, creating a generous and even layer that penetrates the wood surface. Ideal for teak furniture, this oil can be applied multiple times on very absorbent surfaces until saturated. Wipe off excess oil after 1 hour for a stunning wood finish. Coverage of 8-12 m2 per liter and drying time of approximately 24 hours make it convenient and efficient.
- 🌱 DANISH CRAFTSMANSHIP FOR LASTING PROTECTION: Our wood sealer is 100% made in Denmark in collaboration with renowned furniture manufacturers. Crafted with natural raw materials, it provides a non-toxic, eco-friendly solution for wood protection. With a century of expertise in wood furniture care, trust Nordicare for high-quality products that deliver exceptional results.
- 🌱 TRUSTED BY CUSTOMERS AROUND THE WORLD: Nordicare has been a trusted name in wood care for over 100 years. Our furniture oil is designed for efficiency and effectiveness, without compromising on environmental responsibility. Say goodbye to wood stain and hello to a natural wood oil finish that protects and enhances the beauty of your outdoor furniture.
- 🌱 SATISFACTION GUARANTEED: We believe in the power of our teak oil for outdoor furniture, and we're confident you'll love the results. But if you're not 100% satisfied, we'll refund your purchase. Protect your garden furniture with our outdoor wood finish and enjoy the benefits of a durable and beautiful wood surface that will last for years to come.
- WATERPROOFING STAIN – Bring out the beauty of your outdoors with Thompson’s WaterSeal Clear Multi-Purpose Waterproof Stain. Proven to waterproof concrete, brick, exterior wood and other exterior surfaces.
- CLEAR STAIN – This outdoor wood stain and sealer provides a clear finish. It will hide the grain, but still allow the texture to show. It provides complete protection while adding enhancing the natural color.
- FADE RESISTANT FINISH – The advanced polymers in this outdoor wood and deck stain deliver fade-resistant color so it stays looking great year-round. The coating resists UV damage, so you can apply with confidence.
- EASY TO USE – Whether you’re refinishing an existing fence or putting the finishing touches on a new patio, this concrete, brick, wood sealer is easy to apply. Clean the surface thoroughly prior to use for best results.
- THOMPSON’S – Protecting & maintaining all your exterior surfaces, can easily be simplified if you know where to start. Thompson’s WaterSeal is here to take the edge off, thanks to our one-coat products, informative how-to guides & decades of expertise.
- MARINE SEALANT: Our liquid formula creates a UV-stable coating for protection against the elements, saltwater spray, and water damage. Marine is a great protector for outdoor furniture, thermally modified wood, and boat docks. Marine is safe for use over open water and is non-hazardous to aquatic life.
- DECK STAIN: It's water-based, ultra-low VOC, great for enhancing the extended life of your flooring, siding, and porch. The paint forms a water-resistant shield around wood fibers at the cellular level to help preserve the natural color.
- WATERPROOF WOOD SEALER: The wood used on boat docks, decks, and retaining walls near rivers, lakes, oceans, and ponds is subjected to constant moisture. We crafted a sealer, remove stain, and finish all in one, specifically for these installations.
- WOOD SEALANT: Our fast-drying protector penetrates wood below the surface, coating the wood fibers at the cellular level, which creates a long-lasting, flexible, breathable barrier. It provides a no-fuss, easy clean-up with soap and water.
- SEAL-ONCE: Our user-friendly wood sealers and stains are an effective way to protect your lumber or concrete against water damage. When you use Seal-Once, you have the satisfaction of knowing our products will not harm pets, plants, or people.
- Ready to use clear wood sealant and waterproofer
- Perfect for new wood, pressure-treated wood, weathered wood and wood with a weathered clear or semi-transparent stain
- Durable water base sealant that provides waterproofing protection; Coverage up to 350 sq. ft. per gallon
- Repels water
- Provides SUNBLOCK UV protection
- Easy to Use - Tung oil is a natural oil recognized by craftsmen to offer the ultimate hand-rubbed finish for all fine woods; just wipe on and allow the oil to cure at room temperature
- Permeates - Unlike other finishes that form a film on the wood’s surface, tung oil penetrates deep into the wood fibers, cures to a flexible non-oily solid, and becomes part of the wood itself
- Protects - Resistant to moisture, alcohol, oil, and everyday wear for lasting beauty and protection; lasts many times longer than mineral oil and wax based products
- Multi Use - Amazing results on almost any surface that will allow the oil to penetrate - new unfinished wood, weathered wood, stripped wood, concrete floors and countertops, even brick, stone, and cast iron
- Great for Food Contact Surfaces - Since tung oil is considered non-toxic when dry, it is great for cutting boards, butcher blocks, countertops, wooden bowls, wooden utensils, and more
Choosing the Best Outdoor Sealer for Your Wood: A Complete Guide
Your wooden deck, fence, or outdoor furniture deserves protection. An outdoor wood sealer shields wood from sun, rain, and rot. This guide helps you pick the best sealer for your needs.
Key Features to Look For
When shopping, look for several important features. These features determine how well the sealer works and how long it lasts.
UV Protection
Sunlight breaks down wood fibers. This causes graying and cracking. A good sealer must have strong UV blockers. This keeps your wood looking newer for longer.
Water Repellency
Water is the enemy of wood. Sealers must shed water effectively. Look for labels that mention “water-beading” or “hydrophobic” properties. This stops moisture from soaking deep into the wood.
Mildew and Mold Resistance
Damp, shaded wood often grows mold. Choose sealers with built-in mildewcides. These ingredients actively fight off fungal growth.
Penetration vs. Film-Forming
Some sealers soak *into* the wood (penetrating). Others sit *on top* of the wood (film-forming). Penetrating sealers are often better for decks because they allow the wood to breathe. Film-forming sealers can sometimes peel off over time.
Important Materials Matter
The ingredients inside the can affect performance significantly. Understanding the base material helps you choose wisely.
Oil-Based Sealers
Oil-based sealers soak deeply into the wood grain. They offer excellent water resistance. They often look richer and darker on the wood. Cleanup usually requires mineral spirits.
Water-Based Sealers (Acrylic or Latex)
These are easier to clean up—just use soap and water. They dry faster than oil-based types. Modern water-based acrylics offer great UV protection. They are often lower in strong odors.
Hybrid Formulas
Some new products mix oil and water benefits. These offer deep penetration with easier cleanup. They are becoming very popular.
Factors That Improve or Reduce Quality
Not all sealers are created equal. Certain factors boost quality, while others decrease it.
Improving Quality: Solids Content
Check the label for “solids content.” Higher solids mean more protective material is left on the wood after the liquid evaporates. Aim for a higher percentage for better durability.
Reducing Quality: Thin Coats
Applying too thin a coat reduces protection. You must follow the manufacturer’s recommended spread rate. Applying too much sealer at once can also cause sticky spots that never fully cure.
Improving Quality: Application Time
You must apply sealers when the wood is dry. Applying sealer to damp wood traps moisture underneath. This guarantees failure and peeling.
User Experience and Use Cases
Think about where you will use the sealer. Different projects need different products.
Decks and Walkways
These surfaces take heavy foot traffic. You need a durable, penetrating sealer. Look for non-slip additives if the surface gets very wet.
Fences and Vertical Surfaces
Fences get hit hard by sun and rain but not traffic. A high-quality stain/sealer combo works well here. They offer color while providing protection.
Furniture
Outdoor furniture needs easy maintenance. Water-based sealers are often preferred because they are less messy to reapply later.
10 Frequently Asked Questions (FAQ) About Outdoor Wood Sealers
Q: How long does a typical outdoor wood sealer last?
A: This depends on the product and weather. A good sealer on a deck might last 1 to 3 years. Vertical surfaces like fences can last 3 to 5 years.
Q: Do I need to sand the wood before sealing it?
A: Yes, usually. You must remove old finishes, dirt, and gray wood fibers. Use a wood brightener after cleaning to open the pores for better sealer absorption.
Q: What is the best temperature to apply wood sealer?
A: Most manufacturers recommend temperatures between 50°F and 90°F. Avoid applying sealer if rain is expected within 24 hours.
Q: Can I use an interior sealer outside?
A: No. Interior sealers lack the necessary UV blockers and mildewcides needed to fight harsh outdoor elements.
Q: What does “clear sealer” mean?
A: A clear sealer protects the wood without adding color. It lets the natural wood tone show through. It often requires more frequent reapplication than tinted sealers.
Q: How do I know if my old sealer has worn off?
A: Sprinkle some water on the wood. If the water beads up, the sealer still works. If the water soaks in immediately, it is time to reseal.
Q: Are oil-based sealers toxic to pets or plants?
A: Oil-based sealers have strong fumes while drying. Keep pets and children away until the sealer is completely dry. Once cured, they are generally safe.
Q: Can I apply sealer over treated lumber?
A: You can, but you must wait. Pressure-treated wood must dry out completely first, which can take several weeks or months. Test a small area with water first.
Q: What is the main difference between a stain and a sealer?
A: A stain primarily adds color. A sealer primarily protects against water and UV rays. Many products are sold as “stain-and-sealers,” combining both functions.
Q: How do I clean up water-based sealer spills?
A: Water-based products clean up easily with soap and warm water while they are still wet. Dried spills are much harder to remove.