Imagine your beautiful redwood deck, gleaming under the sun. Now picture that same wood, slowly turning a dull gray, or worse, developing cracks and splinters. Does that make you cringe a little? Redwood is stunning, but it needs serious protection to keep that rich color and strength. Choosing the right sealer feels like navigating a confusing maze. Should you pick an oil-based formula or a water-based one? What about UV protection versus mildew resistance? Many homeowners waste time and money on products that just don’t deliver, leaving their expensive wood vulnerable.
This guide cuts through the confusion. We break down exactly what makes a redwood sealer effective. You will learn the key differences between top sealers on the market today. By the end of this post, you will confidently select the perfect product to shield your investment from sun, rain, and time. Ready to give your redwood the lasting defense it deserves? Let’s dive into finding your ideal redwood sealer.
Top Redwood Sealer 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
- NO LAPS, RUNS OR STREAKS: Goof Proof, oil-based formula now equipped with the powerful Turbo Spray System; ideal for exterior wood projects
- OUTSTANDING DURABILITY: No cracking, chipping, flaking or peeling with excellent water resistance and UV protection; great for outdoor decks, fences, railings, gazebos, wood siding and more
- NO BACK BRUSHING REQUIRED: Eliminates the hassle to deliver professional quality results on smaller projects - dries to the touch in one hour
- EASY MAINTENANCE: No sanding or stripping required for reapplication - surfaces previously sealed with Ready Seal Exterior Wood Stain may be resealed with the Turbo spray without removing the previous coat
- FASTER PROJECT COMPLETION: Up to 10-inch wide spray fan provides excellent coverage up to 50 square feet per can (single coat)
- 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
- High-Quality Protection - It is designed to protect, renew, and beautify both new and weathered wood surfaces. Provides a flat, solid finish with latex formulation.
- Easy Application and Clean-Up - Dries to the touch in 30 minutes, ready for recoat in 2 hours, and fully usable in 4 to 6 hours. Cleanup is simple with soap and water, making maintenance and application easy.
- Excellent Coverage - Covers up to 300 sq. ft. per gallon when applied to smooth, nonporous surfaces, ensuring efficient use of product.
- Durable and Versatile - Ideal for exterior siding and compatible with wood surfaces. Recommended for fences, planter boxes, furniture and railings.
- Proven Quality - Established in Cleveland, Ohio, Sherwin-Williams has over 150 years of experience in producing high-quality paints, stains, and coatings.
- No Laps, Runs or Streaks
- No Back Brushing Required
- No Cracking, Chipping, Flaking or Peeling
- Can withstand rain within minutes of application
- Easy Maintenance - No sanding or stripping required for reapplication
- 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.
- All-in-one protection and color – Combines premium wood stain and durable sealant for easy application, offering a rich palette of colors while shielding against UV rays, moisture, and weathering
- Provides moisture protection – Improves appearance, enhances paint adhesion, stabilizes wood dimensions, minimizes expansion or contraction caused by changes in ambient humidity, reduces the likelihood of warping, and ensures dimensional accuracy of wood products
- Long-lasting finish – Formulated to resist fading, peeling, and cracking for 3-5 years, ideal for decks, fences, wall panels, and outdoor furniture
- Enhances natural wood grain – Deeply penetrates the wood fibers, highlighting texture and grain, available in a range of classic and modern shades
- Water-friendly formula – Low odor, quick-drying, and easy to clean with soap and water – perfect for DIY enthusiasts and professionals alike
The Ultimate Redwood Sealer Buying Guide
Redwood is a beautiful wood. It lasts a long time. But the sun and rain can hurt it. A good sealer protects your redwood. This guide helps you pick the best one.
Key Features to Look For
When you shop for redwood sealer, check for these important things:
UV Protection
- Why it matters: Sunlight fades redwood. It turns it gray. Look for sealers that clearly state they block UV rays. This keeps the warm redwood color longer.
Water Repellency
- Why it matters: Rain causes wood to swell and crack. A good sealer creates a barrier. Water rolls right off the surface. Check if the label mentions “waterproof” or “water-repellent.”
Mildew and Mold Resistance
- Why it matters: Damp areas encourage mold growth. Mold looks ugly and can damage the wood fibers. Choose a sealer with additives that fight fungus.
Finish Type
- Natural vs. Toned: Some sealers are clear. They let the natural wood look shine through. Others have a light tint. Toned sealers often offer better UV protection. Decide what look you want first.
Important Materials in Your Sealer
The ingredients inside the can matter a lot. They decide how well the sealer works.
Oil-Based vs. Water-Based
- Oil-Based Sealers: These soak deep into the wood. They provide excellent penetration and durability. They often have a richer look. Cleanup requires mineral spirits.
- Water-Based Sealers: These dry faster. They usually have less odor. They are easier to clean up with just soap and water. Modern water-based formulas are very strong now.
Resin Type
The resin is the protective film. Acrylic resins are common. Alkyd resins are often found in oil-based products. Look for high-quality resins listed on the label. Higher quality resins usually mean longer protection.
Factors That Improve or Reduce Quality
Not all sealers perform the same. Know what lowers the quality.
Factors That Improve Quality
- Penetration: A sealer that soaks deep lasts longer. Deeply soaked wood resists peeling.
- Breathability: The wood needs to release moisture trapped inside. A sealer that lets moisture escape prevents bubbling and peeling.
- Solid Content: Higher solid content often means a thicker, more protective layer after drying.
Factors That Reduce Quality
- Thin Consistency: If the sealer looks watery, it might not have enough protection built in.
- Poor Preparation: Even the best sealer fails if you apply it to dirty or wet wood. Always clean and dry the redwood first.
- Inconsistent Application: Applying thick spots and thin spots causes uneven wear.
User Experience and Use Cases
Think about where your redwood is located. This changes what sealer you need.
Decking and Fences
These areas get heavy foot traffic or constant weather exposure. You need a tough, high-traffic sealer. Reapplication might be needed every one to two years.
Furniture and Planters
Outdoor furniture needs a sealer that resists spills and sun. A water-based product might be easier for furniture maintenance. Planters need good water resistance so the constant moisture doesn’t break down the wood quickly.
Ease of Use
Consider your comfort level. Oil-based sealers smell stronger and take longer to dry. Water-based sealers are user-friendly for beginners. Always read the directions carefully for proper drying times.
10 Frequently Asked Questions (FAQ) About Redwood Sealer
Q: How often should I reseal my redwood?
A: Most redwood surfaces need resealing every one to three years. Decks usually need it more often than shaded fences.
Q: Can I seal redwood that is already gray?
A: Yes, but you must clean and brighten the wood first. Use a dedicated redwood cleaner to remove the gray surface layer before sealing.
Q: Does redwood sealer change the color of the wood?
A: Clear sealers keep the color very close to natural. Toned sealers add a slight warm tint. Always test a small hidden area first.
Q: What is the difference between a stain and a sealer?
A: A stain primarily adds color. A sealer’s main job is protection from water and UV light. Many modern products are a sealer and stain combined.
Q: How long does it take for the sealer to dry completely?
A: Water-based sealers often dry to the touch in a few hours. Oil-based sealers might take 24 to 48 hours before full use. Check the product label for exact times.
Q: Can I use deck sealer on redwood siding?
A: Yes, many deck sealers work well on siding. Siding doesn’t face as much foot traffic. Ensure the product offers good UV protection for vertical surfaces.
Q: What should I do if the sealer starts peeling?
A: Peeling means the bond failed. You must remove the old, peeling sealer completely using a stripper or sanding. Then, clean the wood well before reapplying the new sealer.
Q: Is an oil-based or water-based sealer better for redwood?
A: Oil-based usually penetrates deeper for better long-term protection. Water-based is easier to use and cleans up faster. Choose based on your priority: durability or convenience.
Q: Do I need to sand the redwood before sealing?
A: If the wood is brand new, light sanding helps open the pores. If the wood is old and rough, sanding smooths it. If the old sealer is sound, just clean it thoroughly.
Q: Can I apply sealer if rain is in the forecast?
A: Never apply sealer if rain is expected soon. Water contamination stops the sealer from curing properly. Wait for at least two dry days after application.