Hi, I’m Scott Paul, a licensed exterior restoration contractor with over 30 years of experience and 10,000+ deck restorations. This review of staining and sealing a deck at the same time is based on my own hands-on field testing, not manufacturer claims. See my full credentials and testing stats here.
Yes, you can stain and seal a deck at the same time, because the deck stain you apply to your deck is also the sealer. Every quality deck stain contains oils or resins that seal the wood against water, plus pigment that blocks UV. There is no separate sealing step, and adding one usually causes problems.
- Most deck stains already contain a built-in sealant that protects wood from weather, moisture, and UV rays.
- Clear deck stains offer no UV protection and do not last as long as quality tinted options.
- Semi-transparent deck stains with added sealants provide better and longer-lasting UV damage protection.
- Never apply a separate sealer like Thompson's over an existing deck stain, it will peel.
- More pigment in a deck stain means stronger UV protection for the wood surface.
- Choosing a higher-quality tinted deck stain eliminates the need for any additional separate sealing step.
In this guide:
- Is There a Stain and Sealer in One?
- Stain and Sealer in One Comparison
- How a Stain With Sealer Protects Your Deck
- Clear Sealer vs. Tinted Stain
- Sealing a Stained Deck: Do Not Add a Second Sealer
- How to Stain and Seal a Deck in One Step
- Stain and Sealer FAQ
Is There a Stain and Sealer in One?
Yes. A stain and sealer in one is exactly what a quality penetrating deck stain is. The stain colors the wood and seals it in the same coat, so you buy one product and apply it once. These are the 2 in 1 stain and sealer products I recommend.
TWP 1500 Series
TWP 1500 is an oil based semi transparent stain and sealer with strong mildew resistance. It is EPA registered and compliant in all 50 states, though it is not sold in Canada. It is my go to for shaded or humid decks. See TWP 1500 Series.
Armstrong Clark
Armstrong Clark is an oil based stain and sealer that penetrates deeply and wears away gradually, which makes recoats simple. It comes in transparent, semi transparent, and semi solid colors. At 50 VOC, it is compliant in all 50 states and Canada. See Armstrong Clark.
Restore A Deck Semi Transparent Wood Stain
Restore A Deck Semi Transparent is a water based stain and sealer with low odor and easy soap and water cleanup. It dries to the touch in 1 to 2 hours, which makes it a good fit if you want to stain and use the deck the same day. See Restore A Deck Semi Transparent.
TWP Semi Solid Stain
TWP Semi Solid carries more pigment than a semi transparent stain, so it hides more of the grain and gives the longest UV protection of the penetrating options. It comes in 30 colors and works well on older decks with uneven color. See TWP Semi Solid.
Restore A Deck Solid Stain
Restore A Deck Solid Stain covers the grain completely, like paint, while still sealing the wood. It is the best choice for weathered wood you want to hide, and for railings, fences, and siding. See Restore A Deck Solid Stain.
Stain and Sealer in One Comparison
| Product | Opacity | Grain Visible | Best For |
|---|---|---|---|
| TWP 1500 Series | Semi transparent | Yes | Shaded or humid decks, all 50 states |
| Armstrong Clark | Transparent to semi solid | Yes | Easy recoats, all 50 states and Canada |
| Restore A Deck Semi Transparent | Semi transparent | Yes | Fast drying, water based |
| TWP Semi Solid | Semi solid | Partly | Older decks, uneven color |
| Restore A Deck Solid Stain | Solid | No | Hiding weathered wood, railings, fences |
How a Stain With Sealer Protects Your Deck
A stain with sealer protects a deck in three ways at once. The oils or resins soak into the wood and repel water, which stops the swelling, cracking, and rot that moisture causes. The pigment blocks UV rays, which break down wood fibers and turn bare wood gray. Most quality stains also include a mildewcide that slows mold and mildew growth on the surface.
That is why the stain itself is the protection. You can see it working when water beads on a freshly stained deck. When the water stops beading and soaks in, the stain has worn down and it is time for a maintenance coat.
Beading Water on Deck Stain
Clear Sealer vs. Tinted Stain
Clear sealers and clear deck stains seal out water, but they contain no pigment, so they offer no UV protection. The wood still turns gray underneath, and clear finishes usually need a new coat every year. Tinted semi transparent stains last much longer because more pigment means better UV protection.
If you want to keep the natural look of the wood with as little color change as possible, use a transparent or toner stain rather than a true clear. It adds just enough pigment to slow graying. If you still prefer a clear finish, see these clear deck sealers, and plan on recoating every year.
Sealing a Stained Deck: Do Not Add a Second Sealer
Sealing a stained deck with a separate product is one of the most common mistakes I see. Never apply a sealer like Thompson’s over a deck stain. The stain has already filled the pores of the wood, so the sealer has nothing to soak into. It sits on the surface as a film, and that film peels, often within the first season.
If your stained deck is no longer beading water, the fix is not a sealer. Clean the deck and apply a maintenance coat of the same stain.
How to Stain and Seal a Deck in One Step
- Clean the deck. Use a deck cleaner to remove dirt, gray fibers, and mildew, or a stain stripper if old stain is peeling.
- Brighten the wood. Apply a wood brightener while the wood is still wet to restore its pH and open the pores.
- Let it dry. Wait 48 hours of dry weather so the wood can absorb the stain.
- Apply the stain and sealer. Apply one coat, or two coats wet on wet if the label calls for it, and apply only as much as the wood absorbs.
- Let it cure. Keep foot traffic off for 24 to 48 hours, depending on the stain and the weather.
Stain and Sealer FAQ
Is there a stain and sealer in one?
Yes. Every quality penetrating deck stain is a stain and sealer in one. TWP 1500, Armstrong Clark, Restore A Deck Semi Transparent, TWP Semi Solid, and Restore A Deck Solid Stain all color and seal the wood in the same coat.
What is a 2 in 1 stain and sealer?
A 2 in 1 stain and sealer is a single product that adds color and seals the wood against water and UV at the same time. Nearly all modern deck stains work this way, so the label “2 in 1” is mostly marketing for something a good stain already does.
Is an all in one stain and sealer as good as separate products?
Yes, and on a deck it is better. Applying a separate sealer over a stain creates a film that peels. A single penetrating stain and sealer soaks in, wears evenly, and is easy to recoat.
Do you have to seal wood stain?
Not on a deck. Exterior deck stains already contain the sealer, so no topcoat is needed. Interior wood stains used on furniture or cabinets are different and usually need a clear topcoat such as polyurethane.
Can you put a sealer over a stained deck?
No. A sealer like Thompson’s applied over deck stain has nothing to soak into, sits on the surface, and peels. When a stained deck stops beading water, clean it and apply a fresh coat of the same stain instead.
More Information on What Deck Stain Does for Your Deck
- Are Deck Stains Sealers?
- More Pigment in Deck Stain Means Better UV Protection
- Thompson’s WaterSeal Waterproofer Plus Clear Wood Protector Review
- Why Stain a Deck?
- Best Deck Sealers
Have a question about staining and sealing your deck? Ask in the comments below. I answer most questions within a day.
