Spar Urethane

Olympic Interior/Exterior Spar Urethane is a self-leveling oil-modified urethane that protects wood from water, sun and wind damage.  This advanced formulation contains UV inhibitors to prevent fading and discoloration from sun exposure.  Enriches surfaces with a warm amber tone while providing a durable finish. Choose from a gloss, semi-gloss or satin finish. Ideal for stained or bare wood surfaces such as doors, furniture, trim, windows, garage doors, and more.

  • Oil based Spar Urethane built for interior and exterior woodcare projects
  • Protects wood surface from water, sun and wind damage with a durable and washable finish
  • Delivers a natural, warm amber tone to the wood surface
  • Easy to apply, self-leveling urethane formula helps you apply quickly and evenly
  • Urethane is formulated with unique  UV inhibitors help resist fading and discoloration from the sun
  • This advanced urethane repels moisture and resists cracking and peeling
  • Ideal for protecting and enhancing the look of bare or stained wood doors, furniture, windows and trim, garage doors and more
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Product Features


Approximately 125 sq. feet per quart depending on application and wood porosity

Area Preparation

Surface must be clean and dry. Remove all loose and peeling paint, dust, dirt, grease, oils, wax, and any other surface contaminants. Bare Wood: Sand with 220-grit sandpaper along the wood grain until smooth. Remove all dust. Stain if desired. When applying over stained wood, ensure stain is thoroughly dry. Previously Coated Wood: If the clean surface is in good condition, sand with 220-grit sandpaper. Remove all dust. If the finish is damaged or deteriorated, complete removal of the finish is recommended. Do not use polyurethane over light-colored surfaces, wax, shellac, fresh lacquer, lacquer sanding sealer, silicones, or stearates.

Application Details

Provide adequate ventilation. Stir well before and during use. Do not shake. DO NOT THIN. Apply with a high-quality, natural bristle brush, pad, or spray equipment. Apply thin, even coats with the grain of the wood. For adequate protection on interior surfaces, a minimum of two coats are required. A minimum of three coats are recommended for exterior applications or applications to interior floors. Between coats, sand with 220-grit or finer sandpaper along the wood grain until smooth. Remove dust. Additional and/or maintenance coats will extend the life of the finish. Recoat at the earliest sign of peeling, cracking, or excessive wear. Ideal air, product, and surface temperatures are between 50°F (10°C) and 90°F (32°C).

Drying Time

Requires 4 hours of dry time before adding another coat, and 24 hours before use

Product Warning

Please refer to the product label, Technical Data Sheet (TDS) and Safety Data Sheet (SDS) for detailed safety and application instructions. 

If you scrape, sand, or remove old paint, you may release lead dust or fumes. LEAD IS TOXIC. EXPOSURE TO LEAD DUST OR FUMES CAN CAUSE SERIOUS ILLNESS, SUCH AS BRAIN DAMAGE, ESPECIALLY IN CHILDREN. PREGNANT WOMEN SHOULD ALSO AVOID EXPOSURE. Wear a properly fitted NIOSH-approved respirator and prevent skin contact to control lead exposure. Clean up carefully with a HEPA vacuum and a wet mop. Before you start, find out how to protect yourself and your family by contacting the USEPA National Lead Information Hotline at 1-800-424-LEAD or log on to

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