Shrinkwrap & Accessories

What Is Marine Shrinkwrap — and Why Does Your Boat Need It?

Boat shrinkwrap is a specialized polyethylene film that, when heated with a heat gun, contracts tightly around your vessel's hull and deck to create a custom, drum-tight protective shell. Shrinkwrap and accessories represent one of the most effective and cost-efficient ways to protect a boat during off-season storage or long-distance transport. Unlike a loose tarp that can flap in the wind, pool water, or chafe your gelcoat, shrinkwrap forms a weatherproof seal that resists tearing and sheds precipitation cleanly.

When installed correctly, a quality marine shrinkwrap cover prevents water intrusion, stops mold and mildew from taking hold, deters pests, and guards your gelcoat, vinyl upholstery, and interior woodwork against months of UV exposure. For boaters in regions that experience snow, ice, and freeze-thaw cycles, wrapping is a critical step in the annual winterization process.

Choosing the Right Shrinkwrap Film

Marine shrinkwrap film is rated by thickness in mils — thousandths of an inch. Selecting the correct mil rating for your situation is the most important buying decision you'll make:

• 6 mil — Good for general marine use in milder climates, or for boats stored indoors. Best suited for storage only, not trailering.
• 7 mil — The industry standard for most recreational boats. Handles harsher winters with moderate snow loads and is suitable for mid-sized vessels.
• 8–9 mil — Heavy-duty applications: larger boats, high snow-load regions, or commercial vessels undergoing repair or refit.
• 10 mil and above — Ideal for very large commercial vessels, extended outdoor storage, or temporary structure applications.

Film is also available in white, blue, and clear. White reflects heat to minimize condensation; blue absorbs heat to help snow and ice melt and slide off; and clear is primarily used for brokerage boats or live-aboards where interior visibility matters.

Essential Shrinkwrap Accessories

The film itself is only part of the equation. A proper wrap job requires a full complement of accessories to ensure the cover holds through a full season:

• Shrinkwrap tape — Marine-grade adhesive tape designed to stick in cold, damp conditions and resist UV breakdown. Use it to seal seams, reinforce high-stress areas, and patch any nicks or punctures.
• Self-adhesive vents — Ventilation is critical. Without proper airflow, temperature swings cause condensation to collect under the wrap, creating a breeding ground for mold and mildew. Installing vents in a high/low configuration promotes cross-flow air circulation throughout the storage season.
• Woven strapping and buckles — Polyester perimeter strapping anchors the wrap to the hull and keeps the film taut under snow load and wind stress.
• Heat gun — A propane-fired heat tool is used to shrink and fuse the film. It's a one-time purchase that can be reused year after year.
• Foam pads and corner guards — Padding protects the film at sharp edges, antennas, cleats, and other protrusions that could puncture the wrap.

Top Brands in Shrinkwrap & Accessories

Poly America is the leading name in this category, offering an extensive lineup of polyethylene shrinkwrap film in multiple widths, lengths, and mil thicknesses. Founded in 1976 and recognized as one of the world's largest producers of polyethylene film, Poly America formulates its marine shrinkwrap with UV inhibitors and other additives engineered to resist degradation from sunlight, rain, snow, chemicals, and heat — and their film is guaranteed to be 100% full weight.

Gabriel rounds out the category with a selection of shrinkwrap accessories and related protective products, making it a convenient one-stop source for supplemental supplies needed to complete a professional-quality wrap job.

Greenball contributes additional shrinkwrap products to the category, giving boat owners more options when sourcing film and accessories to match their specific vessel size, storage environment, and budget.