Does your beautiful cedar deck or fence look dull and weathered after just one season? Cedar wood offers amazing natural beauty, but it needs protection from sun, rain, and pests. Choosing the right wood sealer feels like a huge challenge. There are so many types—oils, acrylics, penetrating, or film-forming—and each promises something different. You worry about picking the wrong one, leading to peeling, cracking, or a finish that just washes away in the first big storm.
Don’t let a bad sealer ruin your investment! This guide cuts through the confusion. We will break down exactly what cedar needs and which sealers work best for its unique grain and natural oils. You will learn the simple differences between top sealers so you can protect your wood for years, keeping that rich cedar color vibrant. Get ready to choose the perfect shield for your cedar project with confidence.
Top Wood Sealer For Cedar Recommendations
- 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
- 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
- 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.
- STAIN & SEALER IN ONE - Enhances wood’s natural beauty while providing durable, waterproof protection.
- NO PRIMING OR DILUTING - Easy application with no need for a primer, thinning, or back-brushing.
- UV & WEATHER RESISTANT - Protects against fading, water damage, and harsh outdoor conditions.
- SELF-BLENDING FORMULA - Ensures an even, streak-free finish with no lap marks.
- IDEAL FOR EXTERIOR WOOD - Perfect for decks, fences, siding, outdoor furniture, and more.
- WATER-BASED POLYURETHANE WOOD FINISH: Our sealant provides top-notch protection against wear and tear in high traffic areas. It's odorless and ideal for use on wood siding, log homes, swing sets, outdoor furniture, wooden deck and fence, and more.
- WOOD SEALANT: Unlike many sealers that only form a topcoat, our protector penetrates below the surface to create a long-lasting, water-resistant shield around the wood. It helps resist wood damage, deterioration, and protects against the elements.
- FLOOR SEALER APPLICATOR: Our premium gloss is ultra-low VOC and great for enhancing the extended life of your exterior flooring. The sealant can be safely applied around your home, landscaping, vegetation, or over any water area.
- WATERPROOF SEALER: Ditch the oil-based sealers and choose a UV-stable coating option. Our fast-drying liquid creates a flexible, breathable barrier and provides a no-fuss, easy clean-up with soap and water, as it allows the wood to grey naturally.
- 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 mix, ready to use semi-transparent wood stain and sealant all-in-one
- Waterproofing deck and fence protection, dries in 24 hours
- Durable water based sealant that provides waterproofing protection with resistant coating
- SUNBLOCK UV defense
- Exclusive SCUFF GUARD Technology
- WATERPROOFING STAIN – Bring out the beauty of your outdoor wood with Thompson’s WaterSeal Semi-Transparent Waterproofing Wood Stain. Along with adding lightly tinted color, it’s a deck sealer that prevents water damage to help you maintain your outdoor living spaces.
- SEMI-TRANSPARENT WOOD STAIN – This outdoor wood stain provides a semi-transparent finish. It will hide the wood grain, but still allow the wood texture to show. It provides complete protection while adding lightly 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.
Your Essential Guide to Choosing the Best Wood Sealer for Cedar
Cedar is a beautiful wood. It smells great and resists bugs. But cedar needs protection outside. A good sealer keeps it looking new for years. This guide helps you pick the perfect sealer for your cedar project.
Key Features to Look For
When you shop for sealer, check these important features:
- UV Protection: Sunlight fades cedar fast. Look for sealers with strong UV blockers. This keeps the natural color longer.
- Water Repellency: The sealer must push water away. Water causes rot and mildew. A good sealer beads water on the surface.
- Mildew and Mold Resistance: Damp cedar invites ugly green and black spots. Choose a product with built-in mildewcides.
- Penetration Depth: The best sealers soak deep into the wood pores. Deep penetration offers longer-lasting protection than surface coatings.
- Finish Type: Do you want a natural, clear look, or a slight tint? Sealers come in clear, semi-transparent, and solid colors.
Important Materials in Sealers
The ingredients determine how well the sealer works. Understand these basic types:
Oil-Based Sealers: These soak deep into the cedar. They offer fantastic durability and protection against moisture. They usually take longer to dry and have stronger smells (VOCs). They are great for decking and heavy-use areas.
Water-Based Sealers (Acrylic or Latex): These dry quickly and clean up easily with soap and water. They are low-odor. Modern water-based formulas offer great UV protection but might require more frequent reapplication than oil-based types.
Penetrating vs. Film-Forming: Penetrating sealers soak in and maintain the wood’s natural texture. Film-forming sealers create a plastic-like layer on top. For cedar siding, penetrating sealers often look more natural.
Factors That Improve or Reduce Sealer Quality
The quality of the final look depends on preparation and the sealer itself.
What Improves Quality:
- Proper Cleaning: You must clean the cedar first. Use a dedicated cedar cleaner or brightener. Dirt and old finishes block the sealer from soaking in.
- Good Application Temperature: Apply the sealer when the weather is mild—not too hot and not too cold. Check the label for the ideal temperature range.
- Thin Coats: Applying the sealer too thickly reduces penetration. Two thin, even coats are always better than one heavy coat.
What Reduces Quality:
- Applying to Wet Wood: If moisture is trapped under the sealer, it traps mildew and causes peeling. Ensure the wood is completely dry before starting.
- Using the Wrong Product Type: Sealing cedar decking with a product meant only for interior trim will lead to quick failure. Match the product to the outdoor use.
User Experience and Use Cases
Think about where you are using the sealer.
For Cedar Decks: Decks need the toughest protection. Choose a high-solids, oil-based or heavy-duty water-based sealer rated for foot traffic. Durability is the top priority here.
For Cedar Fences and Siding: These areas need good UV protection to prevent graying. Water-based or natural oil finishes work well. They are easier to apply to tall, vertical surfaces.
Ease of Use: If you are a beginner, look for low-VOC, water-based products. They offer easier cleanup and faster drying times, meaning you finish the job sooner.
10 Frequently Asked Questions (FAQ) About Cedar Sealers
Q: How often should I reseal my cedar?
A: Most cedar surfaces need resealing every 1 to 3 years. Decks usually need it yearly, while sheltered siding might last longer.
Q: Can I apply sealer over stained cedar?
A: Yes, but you must use a clear sealer designed to go over existing stain. If the stain is peeling, you must strip it first.
Q: Does sealer change the color of my cedar?
A: Clear sealers usually make the cedar look richer or “wet.” Tinted sealers will change the color significantly. Always test a small, hidden spot first.
Q: What is the main difference between a stain and a sealer?
A: A stain adds color and some protection. A sealer focuses primarily on moisture and UV protection. Many products today are “stain-and-sealers,” which do both jobs.
Q: What is the drying time for most oil-based sealers?
A: Oil-based sealers usually take 12 to 24 hours to be ready for a second coat or light foot traffic.
Q: Is it better to use a sprayer or a brush on cedar?
A: For siding, a sprayer saves time. However, you must always “back-brush” the sprayed area immediately to push the sealer deep into the wood fibers.
Q: Do I need to sand cedar before sealing?
A: If the wood is new, light sanding (120 grit) helps open the pores. If the old sealer is flaky, you must sand or strip it first.
Q: Can I seal cedar in direct hot sunlight?
A: No. Applying sealer when the wood is very hot causes it to flash dry too quickly. This prevents deep penetration and leads to streaks.
Q: What is VOC, and why should I care?
A: VOC stands for Volatile Organic Compounds. These are chemicals that evaporate as the sealer dries. Lower VOC products are better for air quality and the environment.
Q: Will sealer stop my cedar from turning gray?
A: A sealer with strong UV inhibitors will slow down the graying process significantly. However, all cedar exposed to the sun will eventually weather.