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The Daily Insight

What deck sealer is best

Author

William Cox

Updated on April 17, 2026

Thompsons Waterseal Advanced Natural Wood Protector.ECO-SAFE Wood Treatment – Stain & Preservation by Tall Earth.Rust-Oleum Coppercoat Wood Preservative.CabotStain Australian Timber Oil Penetrating Oil.Thompsons Waterseal – Transparent Stain.

What is a good wood sealer for decks?

  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.

What is the best deck stain and sealer on the market?

Overall ScoreStain TitleOverall Score 4.7 Read reviewStain Title Sikkens SRD Stain ReviewOverall Score 4.5 Read reviewStain Title Behr Semi Transparent Wood Stain ReviewOverall Score 4.4 Read reviewStain Title Ready Seal Stain Review

Is it better to stain or seal 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.

Is Thompson better than Olympic?

Thompson WaterSeal clear coat received a score of 12 out of 100 in Consumer Report’s test of 28 clear decking finishes. Olympic Waterguard scored a 5 out of 100. You can expect WaterSeal to perform slightly better than Olympic Waterguard, so it is appropriate to say that WaterSeal is the superior product.

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.

Should I seal pressure treated wood?

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. …

Do I need to seal the underside of my deck?

The underside of decks, by its very nature, never sees direct sunlight, so stain under a deck is not necessary. … Having said that, no sun can cause mold and mildew to build up on the underside of decks.

How often should you seal your deck?

Applying a sealer and/or stain typically is recommended every one to three years, depending on the finishing product, deck use, weather conditions, and sun exposure.

Do you need to apply a sealer after staining a deck?

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.

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Is Behr or Olympic stain better?

According to Consumer Reports, Olympic Maximum Solid Stain & Sealant in One is rated in their top solid wood stains category, coming in slightly behind Behr.

Is Cabot stain better than Behr?

Additionally, we were pleased to see that Cabot Solid Acrylic Siding stain scored very well in their 2014 ratings.” And after two years the Behr still looked really good, but the Cabot had started to break down. In fact, the Behr Premium Semi-Transparent Weather Proofing Wood Stain earned top ratings.

Is Cabot deck stain any good?

Absolutely the best oil-based deck stain on the market. It penetrates and preserves where applied. I did my large deck completely with 2 coats and the deck still looks brand new. If you want to use the very best then you want to use Cabot’s oil-based stains.

Is it better to stain or paint pressure treated wood?

For similar reasons, wet lumber can hinder how well paint adheres to the wood, but the added problem of the preservatives in pressure-treated wood makes it difficult for the paint to bond; this is why it’s advisable to stain pressure-treated wood instead of paint, as painting requires additional preparation.

What happens if you don't stain pressure treated wood?

The effects that can occur due to a lack of treatment are aesthetic in nature. After 6 months, the wood will start to lose its color and will begin to fade. Ultimately it will fade to grey or silver. This is not a problem in and of itself, and some people prefer this look for their decks.

How long does a pressure treated deck last?

It depends on the climate, the type of wood, its uses, and how well it’s maintained. While pressure treated poles can stay up to 40 years without any signs of rot or decay, decks and flooring might only last around 10 years.

What is the best water seal for wood?

  • Thompsons WaterSeal Advanced Natural Wood Protector – Editor’s Choice and The Best Outdoor Sealer for Wood. …
  • Rain Guard Premium Water Sealer – Eco-Friendly Bargain Option. …
  • Thompsons WaterSeal Waterproofing Wood Protector – Best Clear Wood Sealer for Table, Deck and Fences.

Is Thompsons stain good?

But even among solid stains, not all are up to the task. The Thompson’s WaterSeal Advanced Waterproofer earns an Overall Score of 12 out of 100, as well as a Poor rating for its appearance after one year of simulated weathering. It also doesn’t resist cracking, color change, dirt or mildew.

How long do you wait to waterproof a deck?

DO wait 30 days before sealing a new deck. If it beads up, the wood is still too wet to seal, but if the water is absorbed, it’s ready to seal. Be sure to apply sealant as soon as the wood is ready; leaving the deck exposed any longer increases the likelihood of both ultraviolet (UV) and moisture damage.

Is it bad to power wash a deck?

Damage Caused by Power Washing Your Deck Wood decks are especially vulnerable to power washing, because the pressure exerted by the power washer can lead to splintering. … It’s also a bad idea to use a power washer on a composite deck because the power washer can actually take chips out of the composite material.

When should you waterproof your deck?

The general rule of thumb is to get your deck waterproofed once a year, especially if you live in areas that see a lot of rainfall. Another thing to consider is whether or not you live in an area that gets a lot of direct sunlight year round.

Can I leave my deck untreated?

It is highly unlikely that the deck will rot, splinter or decay if you choose not to have it finished and you can always choose to stain and protect the deck at a later date.

How do you seal a deck for the first time?

Apply the deck sealer with a natural bristle brush. A roller is faster, but brushing helps force the sealer into open pores and grain. Make sure to get the sealer into joints where two boards butt together. Apply the deck sealer to three or four boards at once, working their entire length.

Can you stain a deck in the evening?

The best time to stain your deck is either the spring or the fall. … Applying a deck stain in direct sun will cause the stain to dry to quickly and can result in premature stain failure. In the summer, stain your deck in the morning or evening so the deck surface isn’t too hot.

What temperature can you stain a deck?

Apply stain only at the proper temperature. For most stains, 70 degrees Fahrenheit is the optimum, with the safety range from 50 to 90 degrees Fahrenheit. Stains do vary, so check the label first. Avoid high humidity and staining on hot surfaces.

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.

Can I use Thompson's 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.

Is Olympic deck sealer good?

– Overall the OLYMPIC® MAXIMUM is a pretty average wood stain. Good for about 12-18 months in our opinion. If you are limited to what is available at your local stores the Olympic would be a decent choice. Better wood stains are found on the Internet or specialty stores such as lumber yards and paint stores.

Is Olympic stain the same as Thompsons?

They change the name based on the store that carries it but it is the exact same product. If you have any pictures of your experience with the THOMPSONS WATERSEAL STAIN & SEALER you can add them in the comment area with a detailed description.

Is Pittsburgh stain good?

– The Pittsburgh Paramount Exterior Wood Stain + Sealant was average score overall. The stain did hold up fairly well except in high traffic areas and some mildew was present. We were not overly happy with the coverage rates and will have to strip the stain off prior to recoating to remove the mildew.

Is semi-transparent or solid stain better?

Semi-transparent stains are the lightest in color, allowing much wood grain to be seen. … They provide longer protection and can also be tinted in nearly any color. Solid stains are nearly indistinguishable from paint. The primary visual difference is that solid stain has no sheen and does not reflect light.