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Should I varnish cedar

Author

Michael King

Updated on May 08, 2026

Caution. Transparent, non-flexible, film-forming finishes such as lacquer, shellac, urethane, and varnish are not recommended for exterior use on cedar. Ultraviolet radiation can penetrate the transparent film and degrade the wood.

Do you need to varnish cedar?

Cedar offers a durable option for exterior and interior building projects with natural resistance to rot and decay, so a protective finish is optional. … If you’re using cedar for an outdoor project, give it a light seal coat to guard against moisture and sunlight.

Can you leave cedar wood untreated?

If you leave cedar wood untreated, it will not succumb to the devastating effects of mold, rot and insect damage. … However, even with the proper maintenance, cedar will eventually succumb to fading—usually after about 10 years—and lose its natural tone for good.

When should you seal cedar?

If you are looking to preserve the beautiful rich grain of, say, a mahogany or cedar decking, we recommend sealing the deck with a translucent penetrating stain within 1-2 weeks of construction. This will ensure minimal or no UV damage and give your deck that natural look.

Does cedar need to be waterproofed?

Cedar typically needs to be retreated every two years, but this can be extended with multiple waterproofing coats. For maximum lifetime, apply as many coats of waterproofing as the cedar will absorb. If you plan to paint the cedar after waterproofing, do not treat with more than one coat.

Should I stain cedar?

Although you can let your cedar weather naturally when used for a deck or a fence, when you’re using it as a siding the idea is to keep the elements out. … Staining the cedar is the absolute best way to ensure this, especially in areas that have four-season climates.

What stain looks good on cedar?

  • Ready Seal Natural Cedar Exterior Stain.
  • Thompson’s WaterSeal Waterproofing Stain.
  • Defy Extreme Transparent Exterior Wood Stain.
  • Olympic Stain Elite Woodland Oil Stain.
  • Cabot Semi-Solid Deck & Siding Stain.

How do you seal outdoor cedar?

The best clear Cedar finish stain for outdoors is Linseed oil, hands down. Linseed oil is the primary ingredient in any oil finishes, which dries clear. You can find other clear water-based stains, but will not last nearly as long as a Linseed oil based stain will.

How do you protect cedar wood outside?

On bare new or restored cedar, apply one coat only of water-repellent preservative (1% or less of wax by volume and content). Allow it to dry for the period of time recommended by the manufacturer. If the wood has been dip treated, a longer drying time may be needed.

How do you keep cedar from turning GREY?

To prevent cedar from fading to gray, you need to seal cedar fence with a stain that blocks ultraviolet light and contains a mildewcide, according to Family Handyman.

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Should you sand Cedar before staining?

If your cedar deck is newly installed, you’ll need to sand* the cedar boards prior to staining. … The planing process causes an oily surface on the boards that can hinder the wood stain from penetrating the wood. For an existing deck, you may need to sand* to remove loose wood fibers.

How do you stain rough cedar?

Brush the surface of the cedar with a stiff shop brush to clean off any debris from it prior to priming. Prime the cedar with alkyd primer using a paintbrush to brush on a light coat. Allow the primer coat to dry for 24 to 48 hours. Brush on an even coat of solid color stain using a stain brush.

Do you need to stain or seal a cedar deck?

If properly maintained, the wood can last decades. As a contractor and decking specialist, I’ve seen some cedar decking last more than 50 years. But the key to that longevity is maintenance. You need to stain it every one to three years to keep it looking its best.

Is Thompson's Water Seal good for cedar?

A new Waterproofing Stain from industry leader Thompson’s WaterSeal can not only protect your deck from further damage, but also add rich, beautiful color. … Choose from five popular colors: Acorn Brown, Harvest Gold, Maple Brown, Sequoia Red or Woodland Cedar.

Can linseed oil be used on cedar?

There are two oil finishes recommended for sealing cedar: teak and linseed. Applied the same way, teak and cedar oils produce a similar protective finish with a warm, hand-rubbed, natural-looking appearance as compared to varnish and urethane. Wipe the furniture with a rag to remove any dust.

Can you seal cedar with polyurethane?

Cedar wood, like other fine woods, can and should be coated with polyurethane for protection. Polyurethane will keep dirt, dust, and oil from getting onto the cedar which would dull and damage the color. … Allow the wood to dry completely before applying the polyurethane to it.

How do you keep cedar looking new?

If you have weathered and discolored wood siding, you can regain the new look of cedar by cleaning off the dirt and mildew with a solution of one third cup liquid household detergent (be sure it is ammonia-free), one quart liquid household bleach (containing 5% sodium hypochlorite), and three quarts warm water.

How do you restore cedar wood?

Cleaning. If your siding’s fresh color lays buried under a gray, weathered surface and mold, buy a bleach-based cleaning solution or mix 3/4-cup of bleach with 1-gallon of water to restore or salvage the cedar’s luster.

Is it better to paint or stain cedar?

The best answer is based on your home’s current cedar condition. Stain lasts longer and often looks more natural, but can only be applied if cedar is paint-free. Paint offers more protection and can be a good choice for badly worn homes with previous peeling issues from past painting applications.

How often does cedar need to be stained?

Depending on the annual local weather conditions and how much damage it does to the cedar siding, expect to restain every three to five years. There will be no difficulty in determining when it is time to do the job. How well the siding has weathered the elements determines how often to restain.

How long does Cedar last outdoors?

In outdoor structures that are not in contact with the ground, such as decks, gazebos, pergolas and fence boards, cedar may last 30 years or longer. When in contact with the ground, such as when it’s used for fence or support posts, it can last between 15 and 20 years.

Should I stain or seal my cedar fence?

To get the longest life out of your cedar fence, consider staining it. … In general, the darker the stain you choose, the more effectively it will protect your fence from UV rays. Finally, choose a stain with a built-in sealer (most deck and fence stains have this feature) to protect against moisture and decay.

Can you Restain cedar?

Cedar siding has a warm, natural look. Restaining your cedar siding involves removing the old protective coating and applying a new layer of wood stain in the color of your choice, then applying more protective coating. Restaining can be time-consuming, but it’s easily enough done.

How do you seal rough cedar?

Don’t use polyurethane on rough cedar, as the wood’s coarse nature will prevent the sealer from bonding properly. Semi-transparent water-proof oil-based stain will adequately seal rough cedar against wear and water-based rot.

Should I sand rough cedar?

Cedar is soft. Unless the cedar has deep scratches, gouges or planer marks — lines running perpendicular across the grain — cedar should be sanded by hand. Power sanders remove material fast, almost too fast for finish work.

What is the best sealer for a cedar deck?

  • Pure Tung Oil Finisher for Cedar. …
  • General Finishes Exterior 450. …
  • Star Brite Golden Teak Oil Sealer for Cedar. …
  • Thompson’s WaterSeal Advanced Cedar Protector. …
  • DEFY Crystal Clear Sealer for Cedar. …
  • SEAL-ONCE MARINE Cedar Wood Sealer. …
  • Olympic Stain 56500-04 Maximum Cedar Sealant.

What is the best product to put on a cedar deck?

If you’re ready to make an investment in your cedar deck, Cedar Oil is the perfect choice. It not only provides long-lasting protection from the elements but also brings out the natural tones in your wood and allows its beauty to shine through.

Can you pressure wash cedar deck?

For cleaning a wooden deck, you’ll be best served by using the lowest pressure setting that’s still effective. For soft woods like cedar or pine, this is usually about 500 to 600 psi. For harder woods, it can go up to 1200 to 1500 psi. … Never get closer than 12 inches from the deck unless you’re using low pressure.