Water Resistant
All of our covers are engineered with superior marine-grade fabric to protect dock boxes from elements in marine environments such as constant exposure to the sun, heavy rainfall, oceanic salt, or humid conditions.

When you’re covering your dock box, it’s important to have a durable material you can trust to withstand marina elements. Our dock box covers are crafted with reputable Sunbrella® marine canvas that is resistant to wind, rain, mold, ultraviolet rays, and longtime use. Between our different color and size options, we have over 170+ custom-fit designs ready and available to ship anywhere in the United States. Whether you’re outfitting an entire marina or would like to personalize your own personal boat dock, our covers will keep your dock looking good all year long.











Behind every Dock Box Cover is a team of experts working together to provide premier dock box covers in the marine canvas industry. All of our Dock Box Covers use Sunbrella® marine canvas, which is darted, cut, and hand-sewn in North America.
First, we carefully plan and train every sewer and pattern craftsman to manufacture dock box covers that will stand the test of time. CAD Technology highlights where darts need to go, and then Dock Box Covers’ team of master sewers overlock darts and lock stitches with UV-resistant thread for cover longevity. By using custom specifications from OEM suppliers and detail-oriented sewing techniques, each dock box cover is able to achieve a “fit like a glove” design.

Behind every Dock Box Cover is a team of experts working together to provide premier dock box covers in the marine canvas industry. All of our Dock Box Coves use Sunbrella marine canvas, which is darted, cut, and hand-sewn in North America.
First, we carefully plan and train every sewer and pattern craftsman to manufacture dock box covers that will stand the test of time. CAD Technology highlights where darts need to go, and then Dock Box Covers’ team of master sewers overlock darts and lock stitches with UV-resistant thread for cover longevity. By using custom specifications from OEM suppliers and detail-oriented sewing techniques, each dock box cover is able to achieve a “fit like a glove” design.
Below are some suggestions for how to clean and maintain your marine canvas, boat upholstery or enclosure glass. Always identify the type of fabric or glass you have and check with the manufacturer first before following any cleaning or care routine. Great Lakes Boat Top is not responsible for damage to fabrics or materials due to treatments with the wrong cleaning or care product. If you are unsure of the manufacturer of your fabric or materials, please contact Great Lakes Boat Top at 877-867-7861 or [email protected].
Introducing an exciting breakthrough in marine maintenance: Monofoil Marine safely and effectively repels mold, mildew and over 50 types of bacteria on upholstery, canvas, fiberglass and any other boat surface without damaging chemicals – for up to 3 months! Unlike traditional cleaners and disinfectants that only kill during the original application, MonoFoil Marine molecularly bonds with the surface then attacks mold and mildew each time it attempts to adhere to the treated surface—for up to three months. This can save you money in cleaning solutions, countless hours in maintenance and can add years to the life of your canvas.
The moist marine environment can wreak havoc on your boat’s canvas and interior. Great Lakes Boat Top can help you win the battle through this innovative solution to conquering mold and mildew.
The real key to canvas longevity is like all things in life, maintenance. Keep your canvas clean of dust, dirt and environmental residue on a regular basis. Top fabrics should be cleaned of any dirt buildup at regular intervals. We recommend applying a mild, lukewarm soap solution, such as a liquid dishwashing soap, with a soft brush or sponge. Water temperature is not to exceed 100°F. DO NOT allow the soap to dry. The fabric must then be carefully rinsed with clear water in order to remove any remaining soap residue. Allow canvas to dry thoroughly. DO NOT USE DETERGENTS! The use of abrasive detergents and/or substrates containing solvents or gasoline will damage the fabric. If using high-pressure or steam-cleaning devices, use caution as improper use could damage the vinyl coating and/or fabric. If your boat top is acrylic it will be necessary to retreat your top for water repellency. Be careful which solutions you use, as not all are recommended by the fabric manufacturer. Using harsh chemicals, etc could void the fabric warranty on your top if not recommended by the manufacturer. DO NOT PUT MARINE CANVAS IN WASHING MACHINE OR DRYER.
Use a 303 Protectant Fabric Guard to restore lasting water repellency to Sunbrella boat covers, tops and enclosures. Click here to view a list of recommended cleaning solutions for stains appearing on your Sunbrella® canvas
Lubricate zippers periodically using a clear silicone spray. Spray silicone on to the zipper and work the zipper back and forth. Lubricate fasteners periodically using a clear silicone spray to keep corrosion to a minimum. Replace any missing fasteners or fasteners that show signs of corrosion. Do not use petroleum based products; i.e. petroleum jelly.
Most dock storage boxes are located close to water, exposing them to sun rays and moisture on a regular basis. Our Dock Box Covers are manufactured with Sunbrella® marine canvas fabric – ensuring complete protection and performance. No matter what the weather or marina may bring, our covers can be trusted to maintain your dock box’s quality and appearance.