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.
*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
| in: | 48″ x 96″ |
| mm: | 1219mm x 2438mm |
Standard Gauges
| in: | 1/4″ | 3/8″ | 1/2″ | 3/4″ | 1″ | 1-1/2″ |
| mm: | 6.4mm | 9.53mm | 12.7mm | 19mm | 25.4mm | 38mm |
Approximate Weight
| lbs: | 40 lbs | 60 lbs | 80 lbs | 120 lbs | 160 lbs | 240 lbs |
| kg: | 18.14kg | 27.2kg | 36.3kg | 54.4kg | 72.5kg | 108.8kg |
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
| Properties | Units | ASTM | Nominal Values |
| Density | g/cc | D1505 | 0.963 |
| Tensile Strength @ Yield | psi | D638 | >4,500 |
| Tensile Modulus | psi | D638 | 318,000 |
| Elongation @ Break | % | D638 | >600 |
| Elongation @ Yield | % | D638 | 8.8 |
| Flexural Modulus | psi | D790 | 225,000 |
| Flexural Stress @ 5% Strain | psi | D790 | 4,480 |
| Compressive Properties 10% Strain | psi | D695 | 4,790 |
| Durometer | Shore D | D2240 | 69 |
| Tensile Impact | ft.lbs./in.2 | D1822 | 99 |
| Izod Impact Resistance | ft.lbs./in.2 | D256 | 1.4 |
| Brittleness Temp. | ºC (ºF) | D746 | <-75ºC (<-103ºF) |
| Vicat Softening Temp. | ºC (ºF) | D1525 | 132ºC (270ºF) |
| Heat Deflection Temp. 66 psi | ºC (ºF) | D648 | 84ºC (183ºF) |
| Screw and Nail Withdrawal | lbs | D1761 | 755 & 55 |
| Flammability | Rating | UL94 | HB |
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.
Results
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.
Black 
Mocha Brown 
Nutmeg 
Indigo 
Charcoal Gray 
Slate Gray 
Dolphin Gray 
Sanshade 
Seafoam 
White/White 
