King StarBoard® ST Logo in White

The Polymer Building Sheet That Lasts a Lifetime


  • Concession Stands
  • Dugout Areas in Sports Arenas
  • Equipment
  • Furniture
  • Healthcare Case Goods
  • Indoor and Outdoor Cabinets
  • Kick Plates
  • Lockers
  • Outdoor Kitchens
  • Playgrounds
  • Pool Areas
  • Tabletops and Counters

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King StarBoard® ST is a unique and advanced, high-density polyethylene building sheet that lasts a lifetime. The polymer sheet is 25% stiffer than the original King StarBoard®. It is a product of a proprietary process called K-Stran™, the most advanced manufacturing process for superior flatness and consistency. King StarBoard® ST has a matte gloss finish on both sides of the sheet. It is environmentally stabilized to withstand the harshest outdoor conditions. King StarBoard® ST will not rust, delaminate or rot when exposed to UV, humidity or water. It is one of our most scratch-resistant polymers, making it an excellent construction material for cabinetry, furniture and architectural partitions. The polymer sheet never needs painting or refinishing, works like wood and is easy to fabricate using common woodworking tools and techniques.

King StarBoard® ST XL is available in a lighter version as a custom product. King StarBoard® ST XL sheets are up to 30% lighter in weight than King StarBoard® ST and are made with the same textured surface and colors for a perfect match.

For advanced antimicrobial technology, see King MediGrade®, the antimicrobial polymer building sheet for healthcare applications.

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

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

Disclaimer: King FlameShield will affect finish and color.

Standard Sheet Size

in:48″ x 96″
mm:1219mm x 2438mm

Standard Gauges


Approximate Weight

lbs:40 lbs60 lbs80 lbs120 lbs160 lbs240 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

PropertiesUnitsASTMNominal Values
Tensile Strength @ YieldpsiD638>4,500
Tensile ModuluspsiD638318,000
Elongation @ Break%D638>600
Elongation @ Yield%D6388.8
Flexural ModuluspsiD790225,000
Flexural Stress @ 5% StrainpsiD7904,480
Compressive Properties 10% StrainpsiD6954,790
DurometerShore DD224069
Tensile Impactft.lbs./in.2D182299
Izod Impact Resistanceft.lbs./in.2 D2561.4
Brittleness Temp.ºC (ºF)D746<-75ºC (<-103ºF)
Vicat Softening Temp.ºC (ºF) D1525 132ºC (270ºF)
Heat Deflection Temp. 66 psiºC (ºF) D648 84ºC (183ºF)
Screw and Nail WithdrawallbsD1761755 & 55

All values are determined on specimens prepared according to ASTM standards.
Nominal values should not be interpreted as specifications.
King StarBoard® ST is made entirely from FDA and USDA approved material.
King StarBoard® ST meets ASTM 4976.
King StarBoard® ST contains no VOC’s.

Protect Your Interests with E-84 Class A Flame Compliance Polymer Sheets from King Plastic Corporation Available as an Upgrade with King FlameShield

The ASTM E84

This test method is intended to compare the surface flame spread and smoke developed measurements to those obtained from the tests of mineral fiber cement board and select grade red oak flooring. The results are expressed as Flame Spread Index and Smoke Developed Index.

Class A Interior Finish:

Flame Spread Index 0-25, Smoke Developed Index 0-450. Includes any material classified at 25 or less on the flame spread test scale and 450 or less on the smoke developed test scale. Any element thereof when so tested shall not continue to propagate fire.

King DuraStyle® Custom Cabinet Door Program combines King StarBoard® ST, the environmentally stabilized polymer building sheet, with designer styles and state-of-the-art CNC fabrication. The doors have a matte gloss finish and are developed to withstand the harshest outdoor conditions. They will not rust, delaminate or rot when exposed to UV, humidity or water. King DuraStyle® custom cabinet doors never need painting or refinishing. Ideal for outdoor areas where there may be water, high humidity and moisture.

The King DuraStyle® Custom Cabinet Door Program puts precision door and panel fabrication within reach of cabinet makers that either don’t have the resources to CNC route the doors or don’t want to mix polymer shavings into their wood waste stream. The doors come in 28 styles and 10 standard colors. Custom styles, sizes and colors are available upon request.

Door Styles Offered in King DuraStyle Custom Cabinet Door Program

Lifetime of Function and Durability

  • Outdoor durability with indoor style
  • Genuine King StarBoard® ST material
  • Custom made to your specifications
  • State-of-the-art CNC fabrication
  • Perfectly match your cabinetry
  • Custom engraving available
  • Fast turnaround
  • Doors are easy to order
  • 28 door styles
  • 10 designer colors
  • Custom styles, sizes and colors available

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