King StarBoard® XL, The Lightweight Marine-Grade Cellular Sheet

King StarBoard® XL is a lightweight, marine-grade, cellular high-density polyethylene sheet that is up to 30% lighter than the original King StarBoard®. It is the product of a proprietary process called K-Stran™, the most advanced manufacturing process for superior flatness and consistency. King StarBoard® XL has a matte finish on both sides of the sheet. It is environmentally stabilized to withstand the harshest outdoor conditions. King StarBoard® XL will not rust, delaminate or rot when exposed to UV, humidity or water. It is ideal for a variety of marine applications from boat components to equipment mounts, and looks good enough to use in high-visibility applications where structural strength and a finished edge are not important. For maximum versatility, standard colors are made to coordinate with the original King StarBoard®. The polymer sheet never needs painting or refinishing, works like wood, and is easy to fabricate with common woodworking tools and techniques.

King StarBoard XL is upgradable to King MicroShield® with an advanced antimicrobial technology for protecting the product surface against stain and odor causing bacteria, algae and fungi.*

For more information about King MicroShield®, please visit product page.

Disclaimer: King MicroShield® may affect color.

Where to Buy

^*For bacteriostatic, fungistatic, & algistatic properties. This product is exempt from registration under 40 CFR 152.25(a). King MicroShield^® effectiveness verified by ISO and ASTM standards. This product does not protect users or others from disease-causing bacteria. Always clean this product thoroughly after use.

Standard Sheet Size

Standard Gauges

Approximate Weight

Tolerance information:
Gauges 1/4″ up to 3/4” ± 5% | Length and width plus only at room temperature

Custom sheet sizes, gauges and colors available

All values are determined on specimens prepared according to ASTM.
Nominal values should not be interpreted as specifications.
King StarBoard^® XL is made entirely from FDA and USDA approved material.

opens in a new window Black opens IMAGE file

opens in a new window Charcoal Gray opens IMAGE file

opens in a new window Dolphin Gray opens IMAGE file

opens in a new window Light Gray opens IMAGE file

opens in a new window Sanshade opens IMAGE file

opens in a new window Seafoam opens IMAGE file

opens in a new window White/White opens IMAGE file

*Note: Color accuracy can vary considerably on computer monitors and printers. Please consult your distributor for a product sample before making critical color choices. Specialty colors by special order only.

• Unique (closed-cell) cellular marine-grade sheet.
• Weighs up to 30% less with the same surface finish as King StarBoard®.
• Ideal for fabricating any boat part where high structural strength or a finished edge is not required.
• Precise tolerances ensure consistent color, thickness and density–even for thicker gauges.
• Holds staples and screws securely.
• Environmentally stabilized for harsh sun and tough marine environments.
• Will not rot, swell, splinter or delaminate when exposed to humidity or water.
• Resists odor, even in wet environments.
• Easy to clean and never needs refinishing.
• Matte-textured finish on both sides.
• Easy to fabricate using standard woodworking tools.
• Available in eight standard King StarBoard® colors to match or accent any gelcoat.
• Unlimited custom/proprietary colors.
• Forms easily for smooth curves.
• Available in large sheets up to 60” x 96”
• Custom sheet sizes available.
• Shipped with a protective masking on one side.
• Proven on thousands of boats and yachts.
• Experienced boat builders and boaters know the King StarBoard® brand and trust it more than any other.