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The Daily Insight

How can I protect my deck from staining

Author

Isabella Wilson

Published May 24, 2026

Sealant, stain, and paint can all be applied to a deck for different degrees of protection. Sealants are primarily used to protect against moisture damage. They contain waterproof or water repellant properties and have a thicker viscosity than stains.

Is it better to seal or stain a deck?

Sealing a deck is best for cedar, teak, mahogany, or other quality woods as it enhances the wood grain and natural color. … Staining a deck protects the wood from mold, mildew, moisture, and rot, and UV rays and sun damage.

What is the best protection for decking?

  1. Ronseal Ultimate Protection Decking Oil. …
  2. Cuprinol UV Guard Decking Oil. …
  3. Osmo 2-in-1 UV Protection Decking Oil. …
  4. Manns Premier UV Decking Oil. …
  5. Everbuild Lumberjack Wood Preserver. …
  6. Barrettine Decking Oil. …
  7. Liberon decking oil.

Can you seal a deck before staining?

The wood on a new deck needs to dry thoroughly before sealing or staining. If the wood came still wet with preservative, allow it to dry about 30 days before applying stain or sealer.

Should I seal my deck after staining?

Most of the time, stains also contain a protective sealant. It’s a good idea, though, to re-seal your deck (or check that it needs to be re-sealed) once a year. Water-based stains can adhere to water or oil-based coatings already present on the wooden surface.

Can you put Thompsons Water Seal over stain?

Yes, you can use a water-based sealer such as Thompson’s Water Seal over an oil-based stain as long as you prepare the surface accordingly. Start by allowing the wood to dry thoroughly, then wipe it down with a clean, lint-free cloth dampened with a mixture of denatured alcohol and water.

What is the best stain sealer for decks?

  • Ready Seal 105 Exterior Deck Stain. – Best Overall. …
  • Penofin Deep Penetrating Deck Stain. – Runner Up. …
  • Storm System Penetrating Deck Stain. …
  • Cabot Wood Toned Deck Stain. …
  • DeckWise Ipe Oil Hardwood Deck Stain. …
  • Olympic Stain Maximum Waterproofing Deck Stain. …
  • SaverSystem Semi-Transparent Deck Stain.

What is the longest lasting deck sealer?

Q: What is the longest-lasting deck sealer? An oil-based deck sealer, such as Rust-Oleum Ultimate Spar Urethane, will protect a deck for up to 5 years.

How many coats of stain should you put on a deck?

The general rule of thumb is to apply only as much deck stain as the wood can absorb. Typically this will be 2 coats, unless your dealing with extremely dense hardwoods which may only be able to absorb 1 coat of wood stain.

How much does deck sealing cost?

Cost to Seal a Deck Sealing a deck costs $895 or typically between $551 and $1,277. You’ll pay $0.75 to $4 per square foot for both materials and labor. Labor alone makes up 50% to 75% of the total price. Cost factors include regional worker rates, complexity, size, prep needs and accessibility.

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What is the best sealer for treated wood?

  1. Ready Seal 520 Exterior Stain and Sealer for Wood. …
  2. SEAL-ONCE Nano+Poly Ready Mix Penetrating Wood Sealer. …
  3. #1 Deck Premium Semi-Transparent Wood Stain for Decks. …
  4. Thompsons Waterseal Solid Waterproofing Stain. …
  5. Eco Advance Wood Siloxane Waterproofer Concentrate.

Can I put decking oil over stain?

Anyway, don’t apply oil over a deck stain. The deck stain works because it contains pigment and a binder (usually oil or water-based finish) to bond the pigment in the wood. … With some brands, there may be so little binder that a second coat is recommended.

Is oil or water based deck stain better?

Oil molecules are smaller than water molecules so it penetrates better in comparison. The better a wood decking stain penetrates the better it performs and lasts. By nature, oil based deck stains are easier to apply than water based. … Oils stains are normally more natural looking than water based stains.

Can you varnish decking?

While we are not keen on varnishing decking, this is an appropriate treatment for some furniture and exterior woods. Varnish will protect the wood, but it will create a glossy and more dangerously, a very slippery surface. Clearly this is not what you want on your decking.

What to put on deck after staining?

Bottom line: A combined stain-and-sealant product offers durable, moisture- and UV-protection with the least drawbacks. In lieu of that, you can apply a simple stain to the deck and, after 48 hours, apply sealant for a similar level of protection.

What to put over stain to seal it?

Most stains should be sealed to prevent bleeding. After smoothing the stained wood, apply a sealer coat of thinned shellac, sanding sealer, or other appropriate sealer. Do not use shellac with NGR or water-base stains. If you plan to finish the piece with polyurethane, make sure the sealer is compatible.

What is the best time of year to stain a deck?

The best time to stain your deck is either the spring or the fall. If you stain your deck in the summer, make sure you do it out of the direct sunlight. Applying a deck stain in direct sun will cause the stain to dry to quickly and can result in premature stain failure.

How long does ready seal last on a deck?

Ready Seal is a genuine semi-transparent stain and seal that penetrates, providing protection on vertical surfaces up to 5 years and up to 4 years on horizontal surfaces inhibiting moisture with natural resins and some of the finest oils in the industry; mildewcide-fungicide protection; and UV protection with our trans …

How many square feet will 5 gallons of stain cover?

Divide the total square feet of fence to be stained by the coverage listed on the can. For example, if you have 1,000 square feet of fence and the stain says that 1 gallon covers 200 square feet, you would divide 1,000 by 200, which equals 5 gallons to cover the fence.

Can you apply deck stain with a roller?

You should use a roller brush or sprayer to apply a steady coat of quality stain, such as Olympic Elite stains or Olympic MAXIMUM stains. … PRO TIP: Back brushing your stain will help the stain soak into your deck boards, allowing better, long-lasting results.

Can I apply waterproofing over stain?

And actually, the answer is YES—you can use our EMTECH water-based sealer or top coat over the oil stain. The beauty of all our water-based sealers and topcoats is that they’ll level and adhere to whatever solvent- or oil-based stain you’ve used.

Can you Waterproof already stained wood?

There are three surefire ways to waterproof your wood for years to come. Use linseed or Tung oil to create a beautiful and protective hand-rubbed finish. Seal the wood with coating of polyurethane, varnish, or lacquer. Finish and waterproof wood simultaneously with a stain-sealant combo.

How do you seal oil-based stain?

Water-based poly can have adhesion problems when applied over an oil-based stain that’s not thoroughly cured. That’s why you should always apply a barrier coat of dewaxed shellac to seal oil-based stain. After the shellac dries, a light scuff-sand will leave an excellent surface for the poly to grip.

What happens if you apply second coat of stain too soon?

If you apply a second, unnecessary coat of stain to wood that is already adequately covered, you risk creating a tacky surface that is prone to early peeling because the second coat is not penetrating the wood surface, but simply laying on top of the first coat of stain.

How do I know if my deck needs a second coat of stain?

You can tell whether your deck stain is still protecting the wood if it repels water. If it doesn’t, it’s time to stain again. Consumer Reports tests dozens of solid, semitransparent, and clear stains to find out which last longest.

Can you put stain over stain?

Staining over stain is easy and works beautifully if your applying a dark stain over a lighter stain on raw wood. 2. You can mix 2 or more stains together to make DIY custom stains.

Is Thompson's Water Seal any good?

Overall Score Thompson’s® WaterSeal® at 2 Year Period: 6.125 – Overall Thompson’s® WaterSeal® Clear Plus wood finish is a “clear” disappointment. Any finish that offers zero ability to prevent UV graying should not be considered for your deck or exterior wood.

How long should you wait to stain new pressure treated wood?

It’s important to wait until your pressure-treated wood is completely dry before applying stain, as the chemicals used to treat the wood often leave additional moisture behind. Drying times range anywhere from a few weeks to a few months, depending on such factors as weather and climate.

Should you seal pressure treated deck?

Although the wood is resistant to rot and insect attacks because of the pressure treatment, it can warp, split and develop mildew if not protected from the effects of water. …

How much does 1 gallon of deck sealer cover?

Deck stains provide 200 to 300 square feet of coverage per gallon. You’ll need 2 gallons of stain to cover a 500 square foot deck. Coverage depends on the stain brand, type, and the wood’s age, condition, and porosity.

How much does a gallon of Thompson's Water Seal cover?

MaterialApproximate Coverage (sq. ft./gal.)Wood: Rough Sawn100Wood: Smooth Finish200Plywood150Wood Shingles100