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Marine Spar Varnish
Urethane Varnish

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We are always expanding our distribution; however, if we don't have a dealer in your area, please call us at 1-800-333-5514.

Spar Urethane Varnish Product Literature PDFs:

Marine Spar Varnish

System Three Marine Spar Varnish is a high-build urethane coating designed for marine epoxy and exterior wood surfaces such as railings, doors or any surface where a clear, durable gloss finish is desired. System Three Marine Spar Varnish contains state-of-the-art UV absorbers, which will keep wood looking beautiful even with constant exposure to strong sunlight. System Three Marine Spar Varnish is also resistant to scratching and marring, as well as many cleaners and solvents.

Note: Weather conditions or sudden drops in temperature will affect any varnish. Do not apply before morning dew has dried, and stop well before dusk. Product application temperature: Minimum: 50°F Maximum: 90°F.

Marine Spar Varnish can be sprayed with the proper precautions and technique. Refer to the System Three Paint Application Guide for detailed information on spray application.

• Available in Gloss or Satin finish.
• A high solids, VOC compliant finish.
• Designed for marine and exterior wood surfaces.
• Offers excellent protection from salt air and water.
• Contains ultraviolet light absorbers which will keep wood looking beautiful even with constant exposure to sunlight.
• Formulated to cure properly over System Three epoxy products.

Recommended Uses:
Use on boats, outdoor furniture, doors or on any surface where a clear satin or glass-like finish is desired. Clear Coat makes an excellent base for Spar Urethane Varnish when superior weather resistance is required.
Read the System Three "Clear Finishing of Outdoor Wood” brochure for further information on this combination of products for long lasting preservation of outdoor wood. 

Clear Finishing of Outdoor Wood Project


For health and safety information concerning this product, please refer to the Material Safety Data Sheet (MSDS) for this product. Click here for the MSDS section of our website

Spar Urethane Varnish ships as hazardous and will incur additional charges when shipped via air. Ground shipments generally do not have additional hazard charges. We will contact you with the details of any additional charges before shipping your order.

Urethane Varnish

Physical Properties:

  • Total Solids by Weight: 55%
  • Color: Very Light Amber
  • Coverage: 300 - 350 ft2/Gal (7.5 - 8.75 m2/L)
  • Minimum Application Temperature:  50°F (10°C)
  • Tack Free @ 77°F (25°C):  4 Hours
  • Re-Coat Time @ 77°F (25°C): 12 - 24 Hours
  • Dry-Through Time @ 77°F (25°C): 48 Hours

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