Both valid. Sealing preserves color; weathering gives silver patina.

Why is stain turning blotchy?

Tannins react with some chemicals. Test first.

How often refinish cedar deck?

Every 1-2 years for penetrating stain.

Decking

siding

fencing

outdoor furniture

closet lining

saunas

shingles

How to Finish Western Red Cedar: Complete Staining & Sealing Guide (2026)

Prepared by Lumberama's Wood Finishing Team

|Last updated June 9, 2026|Sources & methodology

Western red cedar is prized for its natural beauty, aromatic scent, and exceptional outdoor durability. Its natural extractives provide resistance to rot and insects, but they also present unique finishing challenges.

Key Takeaways

Western red cedar is prized for its natural beauty, aromatic scent, and exceptional outdoor durability.
Its natural extractives provide resistance to rot and insects, but they also present unique finishing challenges.
Semi-transparent exterior stain for decks and siding; penetrating oil with UV inhibitors for outdoor furniture; clear exterior oil for natural color; interior lacquer or poly for indoor projects.
Straight, even grain with fine texture.
Janka, very soft.

Wood Characteristics

Straight, even grain with fine texture. Non-porous softwood. 350 Janka, very soft. Reddish-brown heartwood with lighter sapwood. Very high tannin content with natural extractives.

Recommended Finishes

Semi-transparent exterior stain for decks and siding; penetrating oil with UV inhibitors for outdoor furniture; clear exterior oil for natural color; interior lacquer or poly for indoor projects.

Preparation Steps

Sand lightly with 120-150 grit. Power wash exterior cedar and dry 48 hours before finishing. Clean mill glaze with light sanding or brightener. No conditioner needed.

Application Steps

1. Clean, dry, mill-glaze-free surface. 2. Apply stain or oil with brush or roller. 3. Back-brush for even penetration. 4. Maintain wet edge. 5. Second coat wet-on-wet if recommended. 6. Dry 24-48 hours. 7. Interior: 2-3 coats with sanding between.

Maintenance Schedule

Exterior stain: reapply every 1-2 years horizontal, 3-4 years vertical. Oil: reapply annually on decks. Interior: refresh every 5-8 years.

Common Mistakes

Film-forming finishes on decks peel; tannin bleed stains surrounding surfaces; applying to wet cedar; pressure washer too aggressive on soft fibers.

Interior vs Exterior

Interior: Aromatic properties shine in closets and saunas. Clear matte preserves scent. Exterior: Excels outdoors. Penetrating finishes only. Semi-transparent stains are gold standard.