There is nothing quite like the warm, golden glow of freshly installed cedar wood. Whether it is a backyard deck, a garden fence, or outdoor furniture, cedar adds a touch of natural beauty to any home. However, nature is rarely kind to wood. Without the right protection, that stunning honey color will quickly fade into a dull, weathered gray. Worse yet, moisture and sunlight can cause your wood to crack, warp, or rot over time.
Choosing the perfect sealant often feels like a guessing game. Walk into any hardware store, and you are immediately hit with a wall of confusing labels. Should you choose an oil-based stain or a clear water-based sealer? Will it peel in a year, or will it actually stand up to the rain? The fear of picking the wrong product—and wasting hours of hard work—is enough to make any homeowner pause.
You do not have to navigate this process alone. In this guide, we break down exactly what your cedar needs to stay strong and vibrant for years to come. We will cut through the technical jargon and highlight the best products for your specific project. By the end of this post, you will feel confident in your choice and ready to protect your investment. Let’s dive into the world of cedar sealants and find the perfect match for your wood.
Top Cedar Wood Sealant Recommendations
- GARDEN BED WOOD SEALER - For Use On Cedar And All Wood Types Used In Raised Bed Gardens. Deep Penetrating, Natural Oils, Bond With Wood Fibers To Protect Wood For A Decade Or More
- NON-TOXIC - FDA Food Contact Safe. Plant Based With No Toxic Chemicals That Can Leach Into Your Garden's Soil And A Natural Citrus Scent. WARNING: Never use sealers made of acrylics, polymers, silane/siloxane/silicone for vegetable gardens. They are derived from petroleum and toxic. If the label says the product contains any of those ingredients return it and purchase a 100% plant based option.
- PLANT SAFE - No Toxic Chemicals To Harm Your Plants, Vegetables Or You. Ingredients You Can Understand (Listed In Product Description Section). ALSO GREAT FOR PET PROJECTS. Seal Your Chicken Coup Or Dog House
- PROFESSIONAL STRENGTH - Covers Up To 200 SF. Used By Professional Growers That Are Required To Have Their Soils Tested For Harmful Chemicals
- MULTI-PURPOSE - Safe For Sealing and Protecting Bird Houses, Bird Feeders, Dog Houses, Chicken Coops. Safe For Animals And Pets
- WATERPROOFING STAIN – Bring out the beauty of your outdoor wood with Thompson’s WaterSeal Transparent Waterproofing Wood Stain. Along with adding smooth color, it’s a deck sealer that prevents water damage to help you maintain your outdoor living spaces.
- TRANSPARENT WOOD STAIN – This outdoor wood stain provides a transparent finish. It will hide the wood grain, but still allow the wood texture to show. It provides complete protection while adding boldly tinted 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 deck, this waterproofing wood stain is easy to apply. It can be applied to damp or dry wood. Clean the surface thoroughly prior to use for best results.
- EXCEEDS INDUSTRY STANDARDS – Thompson’s Waterproofing Exterior Wood Stain exceeds Industry Standard ASTM D-4446 for waterproofing wood.
- NO LAPS, RUNS OR STREAKS: Goof Proof formula with no back brushing required; ideal for exterior wood projects
- OUTSTANDING DURABILITY: No cracking, chipping, flaking or peeling with excellent moisture resistance and UV protection; great for outdoor decks, fences, wood siding and more
- CAN WITHSTAND RAIN WITHIN MINUTES OF APPLICATION: Can also be applied in direct sunlight
- HIGH AND LOW TEMPERATURE APPLICATION: Requires no wet-line application, the product will blend itself and can be applied in any temperature range for proper application
- EASY TO APPLY AND MAINTAIN: Low odor formula may be applied using sprayer, roller or brush onto the wood's surface; no sanding or stripping required for reapplication
- ✔️ Perfect for fences, decks, woodwork, garden boxes, docks, and outdoor furniture ✅ USE ON ALL WOOD TYPES: This universal product can be used on all types of wood including oak, cherry wood, pint, cedar and all other wood types. Cedarshield will also work on all wood types whether it is soft, hard, new, or old wood.
- 🌞 FAST DRY TIME: Cedarshield has one of the quickest turn around times with only needing 72 hours to dry. Spend less time waiting and more time completing and enjoying projects.
- 💧 BUILDS A MOISTURE-RESISTANT BARRIER: Cedarshield will create a moisture resistant barrier that will keep out all moisture to ensure the longevity and health of your wood. Keep alcohol, grease, food oil, acid, water, and other potentially damaging moistures from ruining the surface of the wood.
- 💪 LONG LASTING TREATMENTS: Spend less time worrying about your wood projects, and more time enjoying them. Cedarshield will last you and your family up to 8 years before your next treatment.
- 🔨 USE TO PROTECT DOCKS, DECKS, FENCES & MORE: Cedarshield is the perfect addition to your big wood project like docks, decks, and fences. Make your project built to last for a lifetime by covering it with Cedarshield.
- PRO-GRADE WOOD SEALER FOR OUTDOOR USE: Upgraded pro-grade formula designed for outdoor wood projects. Penetrates into wood fibers to help reduce moisture absorption and surface wear caused by sun and changing weather. Suitable for raised garden beds, planter boxes, fences, and other non-coated outdoor wood surfaces.
- PLANT-BASED & NON-TOXIC FORMULA: Formulated for outdoor wood sealing applications with low odor during application. Designed for use around gardens, plants, and pet areas when applied according to directions.
- COMPATIBLE WITH MOST WOOD TYPES: Works on cedar, pine, hardwood, bamboo, and pressure-treated wood commonly used in garden and outdoor projects. Not recommended for laminated, painted, or pre-sealed surfaces.
- LONG-LASTING FINISH WITH LESS UPKEEP: Unlike surface coatings that peel or flake, this sealer bonds with wood to help maintain its natural appearance over time. Ideal for outdoor environments where wood is exposed to moisture and sunlight.
- EASY APPLICATION & CONSISTENT RESULTS: Apply evenly with a brush, roller, or sprayer on clean, dry wood. Typically requires 2 coats, with approximately 2–4 hours between coats. Coverage ranges from 440–520 sq ft, depending on wood porosity. Tip: Always test on a small area before full application.
- Helps Prevent Water Damage
- Helps Maintain Natural Color-Dries Clear
- Use as a wood sealer, brick sealer, or for concrete waterproofing
- Soap and water cleanup
- For concrete, brick, masonry and wood
- PROFESSIONAL-GRADE PROTECTION FOR ALL WOOD TYPES: Our premium wood sealer penetrates deep into wood surfaces to help protect against the effects of moisture, sun exposure, and outdoor wear. Suitable for cedar, pine, hardwood, bamboo, and pressure-treated wood. A great choice for garden beds, planter boxes, fences, and other outdoor wood structures. Note: Not recommended for laminated or coated wood.
- PLANT-SAFE & WATER BASE FORMULA – FREE FROM HARSH FUMES: Made with no toxic derived ingredients, this formula contains no synthetic solvents, waxes, or strong odors. Designed with your garden and family in mind, it’s a safe choice for spaces shared with plants and pets.
- LONG-LASTING PERFORMANCE WITH LESS MAINTENANCE: Unlike surface coatings that wear away quickly, our formula bonds with wood to help extend its appearance and durability over time. Helps minimize the impact of outdoor elements such as water and sun.
- HOME GARDEN & PET-FRIENDLY USE: Great for DIY garden projects, home planters, and wooden enclosures near pets. Perfect for raised beds, flower boxes, and other non-painted outdoor wooden items.
- EASY APPLICATION & LASTING RESULTS: Apply using a brush, roller, or sprayer—just two coats on a clean, dry surface are all it takes. Dries in approximately 2 hours between coats. Covers Up To 50–200 sq ft depending on the wood’s porosity. NOTE: Before applying, ensure the wood is clean, dry (moisture content < 15%), smooth, and free from dust, grease, and old coatings.
- 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.
The Ultimate Guide to Choosing Cedar Wood Sealant
Cedar is a beautiful, natural wood. It looks great on decks, fences, and outdoor furniture. However, cedar needs protection to last. Without a good sealant, cedar turns gray and brittle. A quality sealant keeps your wood looking new for years. This guide helps you pick the right product for your project.
1. Key Features to Look For
- UV Protection: The sun is the biggest enemy of cedar. Look for sealants that block harmful UV rays to prevent fading.
- Water Repellency: Good sealants stop water from soaking into the wood. This prevents rot and warping.
- Mildew Resistance: Cedar stays damp in shady areas. Choose a formula that contains mildewcides to stop mold growth.
- Breathability: Wood needs to release moisture. A breathable sealant prevents the finish from peeling or bubbling.
2. Important Materials and Formulas
You will find two main types of sealants for cedar:
Oil-Based Sealants
These penetrate deep into the wood fibers. They provide excellent protection and a rich look. They often take longer to dry and have a stronger smell.
Water-Based Sealants
These are easier to clean up with soap and water. They dry quickly and resist yellowing over time. Modern water-based formulas are very durable and eco-friendly.
3. Factors That Affect Quality
Several things change how well a sealant works:
- Solid Content: High-quality sealants have more resins and oils. More solids mean better protection for your wood.
- Transparency: Clear sealants offer the least protection. Tinted or semi-transparent sealants block more UV light and last much longer.
- Application Method: Using a high-quality brush or sprayer ensures an even coat. Thin, even layers always perform better than one thick, messy coat.
4. User Experience and Use Cases
Think about how you use your cedar wood. If you have a deck, you need a sealant that stands up to foot traffic. A penetrating oil is usually the best choice for decks. If you have a vertical fence, you can use a lighter stain or sealant. Always clean your wood thoroughly before you start. A clean surface helps the sealant stick better. Most users find that applying a fresh coat every two years keeps the wood in perfect condition.
10 Frequently Asked Questions
Q: How often should I reapply cedar sealant?
A: Most experts recommend a new coat every 18 to 24 months. Check for signs of water absorption to see if it is time.
Q: Can I apply sealant over old paint?
A: No. You must strip or sand away old paint before applying a sealant. Sealants need to soak into raw wood.
Q: Should I choose a clear or tinted sealant?
A: Choose a tinted sealant. Pigments provide the best protection against sun damage.
Q: How do I know if the wood is dry enough to seal?
A: Drop a little water on the wood. If the water beads up, the wood is not ready. If it soaks in, you are ready to seal.
Q: Can I use a roller to apply the sealant?
A: You can use a roller, but back-brushing with a bristle brush helps the sealant penetrate the wood grain.
Q: Does cedar require a special primer?
A: Usually, no. Most penetrating sealants do not require a primer. Always check the label on your specific product.
Q: What happens if I apply the sealant in direct sunlight?
A: The product will dry too fast. This causes uneven streaks and poor penetration. Work in the shade if possible.
Q: How long does it take for the sealant to dry?
A: Most products are dry to the touch in four hours. Wait at least 24 hours before walking on a deck.
Q: Is cedar sealant toxic to plants?
A: Most modern water-based sealants are safe once dry. Cover your nearby plants with plastic sheets during the application process.
Q: Why is my cedar turning gray?
A: Graying happens because of UV light and moisture. Regular sealing prevents this natural weathering process.