King StarBoard® is the original marine-grade high-density polyethylene sheet and the industry standard. It is the product of a proprietary process called K-Stran™, the most advanced manufacturing process for superior flatness and consistency. King StarBoard is environmentally stabilized to withstand the harshest marine conditions. It will not warp, rot, or delaminate when exposed to humidity or water. King StarBoard is easy to fabricate with standard woodworking tools and requires little or no finishing.

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

King StarBoard is upgradable with King FlameShield, for ASTM E-84 Class A or B Flame/Smoke Compliance and CAN/ULC-S102 for Canadian Compliance.

For more information about King MicroShield® and King FlameShield, please visit those product pages.


Standard Sheet Sizes

in:48” x 96”54” x 96”
mm:1219mm x 2438mm1371.6mm x 2438mm
ColorsOnly in 1-1/2” gauge, all standard colors availableAll standard colors available

Standard Gauges


Approximate Weight 48 x 96 (only in 1-1/2″ gauge)

lbs:240 lbs

Approximate Weight 54 x 96

lbs:45 lbs67.5 lbs90 lbs135 lbs180 lbs

Tolerance information:
Gauges 1/4″ up to 1-1/2” ± 5% | Length and width plus only at room temperature

Custom sheet sizes, gauges and colors available

Physical Properties
PropertiesUnitsASTMNominal Values
Tensile Strength @ YieldpsiD638>4,100
Tensile ModuluspsiD638255,000
Elongation @ Break%D638>600
Elongation @ Yield%D6389.8
Flexural ModuluspsiD790185,000
Flexural Stress @ 5% StrainpsiD7903,810
Compressive Properties 10% StrainpsiD6954,950
DurometerShore DD224068
Tensile Impactft.lbs./in.2D1822115
Izod Impact Resistanceft.lbs./in.2 D2561.1
Brittleness Temp.ºC (ºF)D746<-76ºC (<-105ºF)
Vicat SofteningºC (ºF) D1525 123ºC (253ºF)
Heat Deflection Temp. 66 psiºC (ºF) D648 75ºC (167ºF)
Screw and Nail WithdrawllbsD1761657 & 63

*All values are determined on specimens prepared according to ASTM Standards.
Nominal values should not be interpreted as specifications.
King StarBoard® is made entirely from FDA and made with USDA approved materials.
King StarBoard® meets ASTM D4976.
The raw material used to make King StarBoard® does not contain BPA’s or Phthlates.


Additional Information
  • Made of the finest polymers available, using our
    proprietary K-Stran process for superior flatness
    and consistency.
  • Environmentally stabilized for harsh sun and tough
    marine environments.
  • Will not rot, swell, splinter or delaminate when exposed
    to humidity or water.
  • Precise tolerances ensure consistent color, thickness and
    density, even for special thickness gauges and custom
    order colors.
  • Easy to fabricate with standard woodworking tools and
    requires little or no finishing.
  • Available in eight standard colors to match or accent
    any gelcoat.
  • Unlimited custom/proprietary colors.
  • Durable matte-textured surface on both sides.
  • Easy to clean and never needs refinishing.
  • Edges finish cleanly and easily.
  • Forms easily for smooth curves.
  • Has passed the Federal Motor Vehicle Standard 302 fire
    test required for use in motor vehicles, including
    motor homes.
  • Available in large sheets up to 54” x 96” or 48” 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.