King MicroShield®  polymer sheets use the latest technology for protecting the product surface against stain and odor causing bacteria, algae and fungi.

Disclaimer: This product does not protect users or others against disease-causing bacteria. Always clean this product thoroughly after each use.

Where to Buy


King Antimicrobial Performance Chart Shows 99.99% Inhibition Rate


Disclaimer: The antimicrobial additive may affect finish and color

Please refer to the following products, which can be upgraded to King MicroShield®:

King StarBoard®

King Starboard® XL

King StarLite® XL

King Starboard® ST

King ColorBoard®

King ColorCore®

King Plasti-Bal®


Physical Properties
Properties Units ASTM Nominal Values
Density g/cc D1505 0.96
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 (<-105ºF)
Vicat Softening ºC (ºF)  D1525  172ºC (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® STMS meets ASTM D4976.
King StarBoard® STMS contains no VOC’s.

Additional Information
King Advanced Antimicrobial Technology
Silver Based Triclosan Based
Mode of Action Physically ruptures the cell membrane Releases ionic free radicals that react with cell DNA and disrupt the critical life processes in the cell Releases toxic bischlorinated phenol (PBC) for consumption or cellular absorption, causing lethal mutations in the cell
Bleeding onto the user, into the water, and into the environment
No leaching or migrating Leaches for its mode of action. Must Leach to work. Leaches for its mode of action. Must Leach to work.
Durability Permanent Service life 1-3 years Service life 1-3 years
Cost Economical The cost of silver is high Intermediate
Effectiveness Bacteria, fungi and algae, that cause stain and odors Action variable based on concentration and test or use conditions Action variable based on concentration and test or use conditions
Log Reduction
(1-6, 1 being the
lowest, 6 being the highest)
4 on 24 hour test & 2 hour test 1-2 on a 24 hour test 2 on a 24 hour test
Distribution World wide Varies by company Not accepted or available in certain areas of the world