Marine Spar Varnish

Product Description

System Three Marine Spar Varnish is a high-build 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.

Marine Spar Varnish can be sprayed with proper precautions and techniques. Refer to the System Three "Clear Finishing of Outdoor Wood" for detailed information on the 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 instant exposure to sunlight.
  • Formulated to cure properly over System Three epoxy products.

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: 95°F.

$ 49.95
Total Solids by Weight50%
ColorVery Light Amber
Coverage400 - 500 ft2/Gal (7.5 - 8.75 m2/L)
Minimum Application Temperature50°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

Marine varnishes have traditionally been used in combination with epoxy resin to provide exceptional protection to wood components in marine environments. The epoxy provides the waterproof characteristics, preventing moisture from contacting the wood. The Marine Spar Varnish protects the epoxy from the suns damaging UV rays and considerably extending it’s service life. Using just one of these components will produce sub-par results, while the combination produces a beautiful, long-lasting protective coating. 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.

SDS Spar Varnish Gloss | SDS Spar Varnish Satin


Technical Data Sheet




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.

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