Sandbags for Boat Covers

Protect your boat with the most trusted anchor weight on the water — Titan® Anchor Sandbags. When the wind picks up or storms roll through, your boat cover should stay exactly where you left it. These purpose-built sandbags for boat covers deliver the holding power, durability, and marine-grade design boat owners rely on for dependable protection on lifts, trailers, or in dry-stack storage.

The Sandbag Store — America’s Trusted Source for Industrial & Marine Sandbags

Backed by over two decades of manufacturing experience, The Sandbag Store designs and supplies professional-grade sandbags for government, construction, and marine industries. Every Titan® Anchor Sandbag is built and shipped from our U.S. facility, ensuring consistent quality, fast delivery, and performance you can count on at sea or shore.

Engineered to Withstand the Elements

Every Titan® Anchor Sandbag is built from industrial-grade, 18 oz waterproof vinyl with welded seams that won’t leak, tear, or fray — guaranteed to last at least three years outdoors. Designed and tested in harsh marine environments, these bags endure blazing UV exposure, salt spray, and heavy handling without fading or cracking.

• 18 oz waterproof vinyl shell — UV-rated, tear-resistant, and backed by a 3-year outdoor guarantee.
• Ergonomic thermoplastic rubber handle — secure grip even when wet or sandy.
• Hook-and-loop (Velcro®) fill closure — fill, empty, or adjust weight in seconds.
• Marine-grade stainless D-ring & metal carabiner — corrosion-proof, quick to clip on and off.
• Holds up to 70 lb of sand or equivalent ballast for serious holding power.
• Compact design: 12" × 24" × 4" — balanced weight distribution to prevent rolling.
• Ships free anywhere in the U.S.

Available Colors

Choose the color that fits your boat or marina aesthetic. All colors are UV-stable and fade-resistant.

Where They Excel

• Securing boat covers in windy marinas and during storms.
• Keeping covers taut on trailers, lifts, or dry-stack racks.
• Adding stable ballast for mooring and dockside protection.
• Temporary weights for canvas, tarps, and cockpit enclosures.

How Many Bags Do I Need?

Most boats up to 25 ft use 4–8 sandbags placed evenly along the cover’s perimeter. Larger cruisers, pontoons, and sailboats may require 8–12+ depending on wind exposure and cover design. Focus on corners, high-stress points, and prevailing-wind sides to prevent uplift and maintain cover tension.

Pro Tips from the Dock

• Use clean, dry sand for maximum stability and weight retention.
• Clip to reinforced grommets or tie-down loops only — avoid thin fabric edges.
• Rinse after salt exposure and allow to air dry completely before stowing.
• Store under cover to extend the lifespan of vinyl and hardware.

Marine Note: The stainless D-ring and included carabiner are ideal for securing to cover grommets or lift cleats, providing fast, reliable attachments that won’t corrode or damage finishes.

Boat Cover Sandbag FAQs