Description

This unique and advanced polymer makes the material 25% stronger than the original King StarBoard®.  King StarBoard ST is scratch-resistant making it an excellent construction material for cabinetry, case goods and architectural partitions. King StarBoard ST is environmentally stabilized and has been developed to withstand the harshest outdoor conditions. It will not warp, rot, or delaminate when exposed to humidity or water. It can be fabricated 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.

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

King StarBoard ST 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.

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Active ingredient (Biosafe®)………………….antimicrobial siloxane EPA Reg. No. 83019-1

*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.

Biosafe® is a registered trademark of BIOSAFE, Inc.: Patent number 7,851,653 and 7,858,141.

Specifications

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: 18kg 27kg 36kg 54.4kg 72.5kg 108.6kg

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
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 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 made with USDA approved materials.
King StarBoard® ST meets ASTM 4976.
King StarBoard® ST contains no VOC’s.

Colors

Additional Information

Protect Your Interests with E-84 Class A or B Flame Compliance Polymer Sheets from King Plastic Corporation
Available in King StarBoard® Products

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.

Class B Interior Finish:
Flame Spread Index 26-75, Smoke Developed Index 0-450. Includes any material classified at 25 but not more than 76 on the flame spread test scale and 450 or less on the smoke developed test scale.

ASTM E84 Class A Certification| ASTM E84 Class B Certification | FlameShield Physical Properties Sheet | FlameShield MSDS