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Similarly, the more deeply the stain penetrates the wood, the more it will prevent water damage.

The Thompson’s WaterSeal Transparent Wood Sealer on a green background

The Spruce / Alli Waataja

However, Olympic also has clear stains for brand-new wood and solid stains for older decks.

It even helps protect against scuffs and scratches from footwear or other traffic.

Base punch in:Water-based |Stain Opacity:Semi-transparent |Coverage per Gallon:250 to 350 sq.

Olympic Maximum Wood Stain And Sealer

PHOTO: Amazon

Base throw in:Water-based |Stain Opacity:Transparent |Coverage per Gallon:150 to 400 sq.

However, the Olympic Elite Stain contains a urethane-fortified sealant that effectively wards off algae and mold growth.

Ouroverall bestpick is another water-based option that’s more likely to show the grain.

Thompson’s WaterSeal Transparent Wood Sealer

PHOTO: Amazon

It restores the richness of old or faded wood and is highly protective against moisture and UV rays.

Base key in:Oil-based |Stain Opacity:Semi-transparent |Coverage per Gallon:125 sq.

Seal-Onces nanotechnology formula penetrates wood to a cellular level for the utmost protection against water.

Olympic Elite Stain + Sealant

PHOTO: The Home Depot

It also protects your deck from mold, mildew, and algae growth.

Its available in several color options and also as a tintable base that can be colored as you desire.

Base bang out:Water-based |Stain Opacity:Solid |Coverage per Gallon:200 to 500 sq.

Ready Seal Stain and Sealer

PHOTO: Amazon

Like ourbest mold resistancepick, it also helps prevent mildew or mold growth.

Base jot down:Oil-based |Stain Opacity:Semi-transparent |Coverage per Gallon:300 to 350 sq.

There are four basic levels of stain opacity.

Seal-Once Marine Premium Wood Sealer

PHOTO: Amazon

But how often its necessary depends on a few factors.

Is it okay to pressure-wash a stained deck?

Bakhshi cautions that too much pressure on a deck can strip away stains and damage the wood.

Cabot Solid Wood Stain and Sealer

PHOTO: Lowe’s

Instead, he recommendsscrubbing with a deck cleanerdesigned to remove dirt, mold, and mildew stains.

Pressure-treated wood is chemically treated to improve its durability, resistance to rot, and resistance to insect damage.

We especially likeReady Seal Stain and Sealerfor pressure-treated decks.

DeckWise Ipe Oil Plus Hardwood Deck Finish

PHOTO: Amazon

Why Trust The Spruce?

Michelle Ullmanhas been writing about all things home-related since 2011.

Over the years, shes tackled numerous DIY home improvement projects herself, including many painting and staining projects.