Marine Spar Urethane Varnish
SKU: 42795036884

Marine Spar Urethane Varnish

Sale price$44.99 Regular price$49.99
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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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Lyndsie Smyser
Massapequa, US
★★★★★ 5
Incredible quality!!!
Color: Black/Black
We have had these for a little over three months and so far they are still working fantastically. We are amazed at the quality for the price. It makes grinding fresh salt and pepper so easy! Perfect for cooking and topping food.
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Reviewed in the United States on May 23, 2026
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Celio Pereira
Bozeman, US
★★★★★ 5
Works well, just wish it was rechargeable
Color: Stainless Steel
These grinders work pretty well and are really convenient to use with one hand while cooking. The adjustable coarseness is nice and the LED light actually helps more than I expected. They seem well made and hold a good amount, just wish they were rechargeable instead of using batteries. Still happy with them overall.
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Reviewed in the United States on May 26, 2026
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Denise Esau
Louisville, US
★★★★★ 5
Great value
Color: Black/Black
Great value,great product,easy to use. Highly recommend. Grinding performance excellent.
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Reviewed in the United States on May 27, 2026
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IMkirok
Pawtucket, US
★★★★★ 5
More than a daily grind
Color: Purple
We are very happy so far, working very well. The grind is even and easy to adjust with a simple turn of the screw on the base of the grinder. The automatic light is a nice feature, especially as I am 66 and my eyes are not what they used to be. Once I turned the on button to face front, I'm no longer triggering a grind just by picking these up. (our last grinders trigger was on the top of the unit}. They feel well constructed and are easy to fill. My wife absolutely loves the color (purple). will update this in a couple months for durability, but for the price so far (1 month) 5 stars
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Reviewed in the United States on April 12, 2026
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Mom of Boys
New York, US
★★★★★ 4
Electric grinders
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Easy to refill. We use pink Himalayan salt and the grinder does well. It seems to struggle a bit with the peppercorns bit still gets the job done. The light is nice. We have enjoyed the ease of use. It also looks nice on the counter. The holder is great as it catches any fine debris after use. I purchased this one as it uses actual batteries and not something else I have to charge. They have been used daily for 2 months and have not needed to change the batteries yet.
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