SKU: 42795036884

Marine Spar Urethane Varnish

Sale price$44.99 Regular price$49.99
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Ships within 48 hours · Estimated delivery Aug 10 - Aug 15

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Description

Marine Spar Urethane VarnishSystem Three Spar Varnish is a urethane enhanced film finish formulated to protect against the harshest salt water and marine environments, as well as provide protection for your outdoor projects. It contains UV absorbers and other additives that help it combat the worst that nature has to offer. System Three Spar Varnish, like all outdoor film finishes, is more elastic and a bit softer to enable it to move with the wood as it expands and contracts

System Three® Spar Varnish is a urethane enhanced film finish formulated to protect against the harshest salt water and marine environments, as well as provide protection for your outdoor projects. It contains UV absorbers and other additives that help it combat the worst that nature has to offer. System Three Spar Varnish, like all outdoor film finishes, is more elastic and a bit softer to enable it to move with the wood as it expands and contracts with the seasons. It’s a good finish for outdoor furniture and projects in general but like all outdoor finishes, it could use a little help – a good base underneath to keep it looking good longer. We recommend sealing the wood underneath with a good waterproofing sealer.

The number one enemy of an outdoor film finish is moisture that gets into the wood and underneath the finish. Moisture makes its way into the wood via the wood actually breathing (a result of not sealing the wood off from ambient moisture in the air), as well as through micro fissures in the topcoat caused by temperature extremes and UV radiation. So, if you’re contemplating a film finish for your outdoor furniture – consider using a good sealer underneath. A sealer will combat this “breathing” the wood does and be a barrier to prevent moisture from expanding underneath the topcoat, even if it manages to get through the micro fissures. The bonus for this hard work is your finish will look good well beyond what you might otherwise expect…but not forever.

Start with a good sealer such as System Three Clear Coat. If it’s going to be outside all the time all year long and even if it’s not, System Three recommends encapsulating the wood with System Three Clear Coat prior to assembly. This will effectively stop the wood from breathing and provide an excellent base for the topcoat to adhere to plus it will stop moisture from spreading underneath the finish through micro fissures. Be advised that even if you follow all these recommendations, you will still need to take steps to care for your project in the off-season and to eventually apply a new coat or two of finish or remove the old finish down to the Clear Coat and recoat the piece. However, following our suggestions will keep your Adirondack chair or other outdoor project looking good longer, and it will be easier to recoat when necessary.

Features:


  • Designed for marine and exterior wood surfaces
  • Offers excellent protection from salt air and water
  • Contains ultraviolet light absorbers that protect finish from exposure to sunlight
  • Formulated to cure properly over System Three epoxy products
  • Does not require sanding between coats when additional coats are applied within 24 hours
  • VOC compliant

Specifications:

  • Type: Oil-modified urethane polymer
  • Size: Quart
  • Sheen: Gloss
  • Color: Very light amber
  • Interior/Exterior Use: designed for exterior use
  • Recommended Use: Directed at, but not limited to, the finishing and coating of wood
  • Application Method: brush, roll, spray
  • Coats: varies per project (see PDF System Three Clear Finishing of Outdoor Wood)
  • Coverage: 100-125 sq.ft.
  • Minimum Application Temperature: 50°F
  • Maximum Application Temperature: 95°F
  • Ideal Drying Conditions: 77° F and 50% humidity
  • Dry Time - Tack Free: 4-6 hours
  • Dry Time - Dust Free: 8-12
  • Dry Time - Recoat: 12-24 hours
  • Dry Time - Complete Cure: 14 days
  • Clean-Up: mineral spirits or lacquer thinner
  • Material VOC (g/L) 440-450 g/L

What's Included:

  • (1) Marine Spar Urethane Varnish - Gloss - Quart

Notes:

  • Please see the PDF from System Three (link on this page) for more information on finishing outdoor wood.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 42795036884

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Cassandra Moxlow
Charlottesville, US
★★★★★ 3
Didn’t meet full expectations
Size: One Size, Color: (001) Black / Black / Jet Gray
Much shorter than anticipated.
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Reviewed in the United States on December 16, 2025
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Andrew B
Grantham, US
★★★★★ 5
High Quality
Number of Items: 6, Color: Black (6-pairs), Size: Large
High quality and fit great
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Reviewed in the United States on May 28, 2026
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Peter
Fort Morgan, US
★★★★★ 5
Great socks, watch out for bad seller
Number of Items: 6, Color: Black (6-pairs), Size: Medium
The socks are great, comfy, padded where you want it. I used these for work socks; I have a blend of corporate desk life and maintenance work. I like the low cut so my shoes don't rub the back of my ankle but not so high that socks always fall down. Great for running and sports as well. Been using these for years. Buyer beware though of the particular seller Liegnitz Group: They were late shipping, sent me the wrong socks so I sent for a return and they send me the right ones. My return got delivered back to them but they did not process it and did not send out any new ones. They cancelled my order and acted like I got the right ones all along. Buy from a different retailer.
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Reviewed in the United States on November 8, 2024
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Terry Hale
Alexandria, US
★★★★★ 5
Comfortable with perfect fit
Number of Items: 6, Color: White (6-pairs), Size: Medium
I have had these socks for a few weeks now and wear them when running. I have small feet at a men's size 7 and they fit perfectly. Most men's socks are to big for my feet. They are pretty thin but well made and have good cushion. I recommend these for anyone that likes ankle socks for athletic activities.
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Reviewed in the United States on March 19, 2024
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Notimpressed
Louisville, US
★★★★★ 4
Husband loves socks
Number of Items: 6, Color: Black (6-pairs), Size: Large
Socks are very comfortable and soft. He got rid of the other ones he had! Also, it was a great price.
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Reviewed in the United States on January 9, 2024

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