Would anyone recommend this product for countertops and around sinks?

No, this is a great product but remains a little flexible. You would want a 2 part Epoxy ( very easy to apply) or a poly based product. System Three has a great epoxy line or get a "bar top epoxy".

Will this over previously stained sealed wood

yes as long as you sand with 220 first

Does this work well on outdoor Acacia wood furniture?

Depending on the wood..but generally I would say if it works on a boat..it should work on wood like a clear coat..

Being an oil-based varnish, I know this product will have an amber cast, but is it slight or moderate in color?

slight but it will darken with age.

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System Three Marine Spar Varnish, Satin, 1 Qt Can

Product ID: 30953054

Details

Brand
SYSTEMTHREE
Finish Type
Satin
Item Weight
2.18 Pounds
Liquid Volume
32 Fluid
Material
Urethane

🎨Satin smooth finish

☀️Advanced UV protection

🛥️Marine-grade durability

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Description

🛥️ Protect your wood like a pro — shine on, rain or shine!

OPTIMIZED COVERAGE - Covers 100-125 sq ft per quart, delivering long-lasting protection with fewer coats.
VERSATILE ELEGANCE - Perfect satin finish enhances boats, outdoor furniture, and doors with a subtle gloss.
ULTIMATE UV DEFENSE - State-of-the-art UV absorbers keep wood vibrant under relentless sun exposure.
EFFORTLESS APPLICATION - Compatible with natural bristle brushes and spray techniques for professional results.
MARINE GRADE TOUGHNESS - High-build urethane formula resists scratching and marring in harsh outdoor conditions.

System Three Marine Spar Varnish is a premium satin urethane varnish designed for exterior wood surfaces exposed to demanding marine environments. Featuring advanced UV absorbers and a high-build formula, it offers superior protection against sun damage, scratching, and weathering, covering up to 125 square feet per quart. Ideal for boats, outdoor furniture, and doors, it ensures a durable, elegant finish that stands up to the elements.

Specifications

ASIN	B004C0ENHU
Best Sellers Rank	#306,112 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #297 in Household Polyurethanes, Shellac & Varnish
Brand Name	SYSTEMTHREE
Compatible Material	Wood
Coverage	100-125 square feet
Customer Reviews	4.6 4.6 out of 5 stars (209)
Finish Types	Satin
Global Trade Identification Number	00646697002868
Item Form	Liquid
Item Type Name	Marine Spar Varnish
Item Weight	2.18 Pounds
Liquid Volume	32 Fluid Ounces
Manufacturer	System Three Resins, Inc.
Manufacturer Part Number	1855S16
Material Type	Urethane
Model Number	1855S16
UPC	646697002868
Unit Count	1 Count

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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B/.218

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Panama.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Great price for an authentic product. Fast international shipping too!

3 weeks ago

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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