Does your beautiful cedar deck look dull and weathered? Sun, rain, and foot traffic constantly attack your outdoor oasis. Over time, untreated cedar turns gray and can even start to splinter. That is a real bummer when you want a perfect place to relax!
Choosing the right sealant adds a major layer of protection. But the market floods you with confusing terms like oil-based, water-based, or penetrating finishes. Which one truly keeps your deck looking new longer? Picking the wrong product means wasted money and a short-lived finish.
This guide cuts through the confusion. We will break down exactly what you need to know about sealants for cedar. You will learn which formulas offer the best defense against the elements and keep that rich cedar color popping.
Ready to give your deck the long-lasting shield it deserves? Let’s dive into finding the perfect sealant for your cedar masterpiece.
Top Sealant For Cedar Deck Recommendations
No. 1
Ready Seal Exterior Wood Stain | Semi-Transparent Oil-Based Formula | Professional Grade Stain and Sealer in One | Ideal for Decks, Fences, Pergolas, Wood Siding & More | 5 Gallon | Natural Cedar
- 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. 2
SEAL-ONCE Nano+Poly Wood Sealer and Waterproofer, Cedar, 1 Gallon
- WATER-BASED WOOD FINISH: Our sealant provides top-notch protection against wear and tear in high traffic areas. It's odorless and suitable for use on wood siding, log homes, swing sets, outdoor furniture, wooden deck and fence, and more
- PENETRATING 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 protect against the elements
- ULTRA-LOW VOC FLOOR SEALER: Our premium gloss is ultra-low VOC and enhances 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
- NON-TOXIC WOOD PROTECTION: Our user-friendly wood sealers and stains are an effective way to protect your lumber against water damage. When you use Seal-Once, you have the satisfaction of knowing our products will not harm pets, plants, or people
No. 3
Seal-Once Marine Waterproof Wood Sealer and Stain, Bronze Cedar, 1 Gallon
- MARINE SEALANT: Our liquid formula creates a UV-stable coating for protection against the elements, saltwater spray, and water damage. Marine is a protector for outdoor deck, 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, enhancing the extended life of your wood 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
No. 4
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, UV Protection - 1 Gallon, Natural Cedar
- 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.
No. 5
SaverSystems #1 Deck Premium Semi-Transparent Outdoor Wood Stain and Sealer in One - Water Based Wood Stain for Decks, Fences, & Siding - 1 Gallon (Cedar)
- SEMI TRANSPARENT EXTERIOR WOOD STAIN: Our outdoor wood stain and sealer allows the natural wood grain to show through, highlighting the beauty of your decks, fences and sidings and preserving its natural look.
- ULTIMATE UV PROTECTION DECK SEALER: Shields wood from damaging UV rays, preventing fading & graying. Lasts longer than deck paint for wood decks, siding or fences & is better for the planet because it's water based with less than 50 g/l VOC content.
- WOOD DECK STAIN AND SEALER IN ONE: This outdoor wood protector serves a dual purpose as both a stain and sealer. It adds color to your wood and seals it, designed to penetrate deep into wood pores for maximum protection and longevity.
- BEAUTIFUL WOOD STAIN COLORS: Our semi-transparent wood deck stain comes in stunning colors that dry to a flat and natural-looking finish. Enhance the beauty of your exterior wood with our natural, cedar, light walnut, gray, and dark walnut colors.
- EFFECTIVE ON DAMP WOOD FOR FASTER APPLICATION: Our wood stain sealer works on damp wood, cutting down wait times between cleaning and staining. Once your wood deck is visibly dry, it's ready for staining, speeding up your project.
No. 6
SEAL-ONCE Nano+Poly Wood Sealer and Waterproofer, Bronze Cedar, 1 Gallon
- WATER-BASED POLYURETHANE WOOD FINISH: Our sealant provides top-notch protection against wear and tear in high traffic areas. It's odorless and suitable for use on wood siding, log homes, swing sets, outdoor furniture, wooden deck and fence, and more
- PENETRATING 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 protect against the elements
- ULTRA-LOW VOC FLOOR SEALER: Our premium gloss is ultra-low VOC and enhances 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 WITH UV STABILITY: 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
- NON-TOXIC WOOD PROTECTION: Our user-friendly wood sealers and stains are an effective way to protect your lumber against water damage. When you use Seal-Once, you have the satisfaction of knowing our products will not harm pets, plants, or people
No. 7
Olympic Elite 1 gal. Atlas Cedar Semi-Transparent Stain and Sealant in One Low VOC
- Our best lifetime wood stain results, guaranteed
- Advanced penetrating formula provides rich, beautiful color with stain & wood sealer all in one
- Four season protection package delivers a urethane-fortified sealing formula for toughness against cracking and peeling, enhanced waterproofing protection and provides a powerful resistant finish
- Exceptional color clarity to bring out the natural beauty of wood
- Recommended for use on exterior wood decks, fences, siding, railings, outdoor furniture and other wood surfaces
No. 8
KILZ Waterproofing Semi-Transparent Wood Stain, Cedar Naturaltone, 1-Gallon, UV Protection for Decks, Fences, Siding & Outdoor Furniture
- WATERPROOFING WOOD STAIN: KILZ Waterproofing Wood Stain is a semi-transparent exterior stain that offers long-lasting UV protection and waterproofing that helps maintain the integrity and beauty of wood in variable outdoor conditions.
- ADVANCED FORMULA: Our 100% Acrylic formula protects wood from rain, snow and sun damage. This stain is warrantied up to 3 years on decks and up to 5 years on fences and siding
- MULTIPLE USES: Use on properly prepared new to moderately weathered and unsealed exterior wood surfaces (0-10 years exposure) including decks, shingles, wood patio furniture, railings, siding, shakes and fences.
- SUPERIOR COVERAGE: This 1 Gallon can of KILZ Waterproofing Wood Stain covers approximately 250-300 square feet with the first coat and 500-600 square feet with the second coat. Wait 1-2 hours before recoating. Fully cured coating can be washed after 72 hours
- KILZ Brand is trusted by DIYers and Professionals alike for over 50 years - delivering excellent, long-lasting results you can be proud of for years to come.
Your Essential Guide to Choosing the Best Sealant for Your Cedar Deck
Cedar decks look amazing. They bring natural beauty to your yard. But cedar wood needs protection. A good sealant keeps your deck looking great for years. This guide helps you pick the right one.
Key Features to Look For in a Cedar Deck Sealant
Not all sealants are the same. Look for these important features when you shop:
UV Protection
- Sunlight fades cedar fast. A good sealant must block harmful UV rays. This keeps the natural cedar color from turning gray.
Water Repellency
- Rain and snow damage wood. The sealant should make water bead up and roll off. This stops rot and mildew growth.
Mildew and Mold Resistance
- Damp areas invite mold. Choose a product with built-in mildewcides. This keeps the surface clean and safe.
Penetration Depth
- The best sealants soak deep into the wood grain. Deep penetration offers longer-lasting protection than surface coatings.
Important Materials: What is in Your Sealant?
The ingredients matter a lot. Sealants usually fall into two main material groups:
Oil-Based Sealants
- Pros: Oil deeply penetrates cedar fibers. This often provides the best water resistance and a rich, natural look.
- Cons: They take longer to dry. Cleanup needs mineral spirits, not just soap and water.
Water-Based (Acrylic or Latex) Sealants
- Pros: These dry quickly. They are easy to clean up with water. They often offer good UV protection and are lower in odor.
- Cons: They might not penetrate as deeply as oil. They sometimes require more frequent reapplication.
Factors That Improve or Reduce Sealant Quality
The quality of the product affects how long it lasts. Pay attention to these factors:
Quality Boosters
- Resin Content: Higher-quality sealants have more solid resins. More resin means a tougher, longer-lasting protective film.
- Natural Oils: Sealants containing high amounts of natural wood oils (like tung or linseed) nourish the cedar, keeping it flexible and less prone to cracking.
Quality Reducers
- Thin Formulas: Very thin, cheap sealants often just sit on top of the wood. They wear off quickly during foot traffic.
- Poor Pigmentation: If the sealant lacks enough pigment (color), the UV protection will be weak. Clear sealants offer the least UV defense.
User Experience and Use Cases
Think about how you plan to use the sealant and how easy it is to apply.
Application Ease
- Most sealants apply easily with a brush, roller, or sprayer. Water-based options are usually the simplest for DIY beginners.
- Always check the temperature requirements. Applying sealant when it is too hot or too cold reduces its ability to soak in properly.
Maintenance and Lifespan
- A high-quality sealant might last 2–3 years before needing a refresh. Lower-quality products might only last one season.
- When it’s time to reapply, you usually do not need to strip the old sealant completely if you use a penetrating product. Light cleaning is often enough.
10 Frequently Asked Questions (FAQ) About Cedar Deck Sealants
Q: How often should I re-seal my cedar deck?
A: Most decks need re-sealing every one to three years. You should re-seal when water stops beading up on the surface and starts soaking in quickly.
Q: Can I use a deck stain instead of a clear sealant?
A: Yes. Stains contain pigments that offer better UV protection than clear sealants. They also change or enhance the wood’s color.
Q: Does the cedar have to be completely dry before sealing?
A: Absolutely. Most manufacturers require the wood to be dry for at least 48 hours after rain. Check the product label for specific moisture content rules.
Q: What is the biggest mistake people make when sealing cedar?
A: The biggest mistake is applying the sealant too thickly. This causes a gummy surface that peels easily. Thin coats that soak in are always better.
Q: How do I clean the deck before applying the sealant?
A: You must clean the deck thoroughly. Use a dedicated deck cleaner or a mild detergent. Scrub off dirt, mildew, and any old, failing sealant.
Q: Are oil-based or water-based sealants better for cedar?
A: Oil-based sealants generally penetrate cedar better, offering superior water resistance. Water-based sealants are easier to use and clean up.
Q: Will sealant stop my cedar from turning gray?
A: A sealant with strong UV inhibitors will greatly slow down the graying process. However, some color change is natural over time.
Q: Can I apply sealant if the temperature is below 50°F?
A: No. Most sealants will not cure correctly in cold weather. Always apply sealants when the forecast shows mild, dry weather for several days.
Q: What is the difference between a sealer and a waterproofer?
A: For decks, these terms are often used interchangeably. A good deck sealer must waterproof the wood while also protecting it from the sun.
Q: How long does it take for the sealant to fully cure?
A: The deck is usually safe to walk on after 24 hours. Full curing, where the sealant reaches maximum hardness and water resistance, can take up to seven days.