Alro logo Alro Steel was established in 1948 by Al and Robert Glick and has grown to include Alro Plastics, Alro Industrial Supply and Alro Metals Outlet.

Alro Plastics Product: King ColorBoard®



ColorBoard Colors

Size and Availability:

Sheet / Slab stock
- Thickness: 1/4”, 1/2”, and 3/4” thick
- Sheet size: 48” x 96” standard

ColorBoard  ColorBoard
King ColorBoard® is a high density polyethylene sheet that is versatile, durable and colorfast for the competitive edge you’re looking for. Environmentally stabilized for a lifetime of worry-free use in harsh outdoor environments. Its bright, primary colors make it ideal for sign, industrial, marine, playground and recreational applications. For maximum versatility, standard colors are made to coordinate with King ColorCore®.

King ColorBoard® features an attractive matte finish and is manufactured to the highest standards in the industry. Accelerated color weather tests performed by independent labs and several independent R&D departments show that King ColorBoard® retains its color better and longer, thanks to the stringent standard of environmental protection built in every sheet.

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

ColorBoard LEED U.S. Green Building Council info U.S. Green Building Council (LEED)

Add Antimicrobial Protection:

King MicroShield® is a new kind of antimicrobial protection upgrade now available in many of King Plastic Corporation’s polymer sheets, slabs and massive shapes.

Learn more about King MicroShield®


  • Extremely flat and consistent sheets
  • Environmentally stabilized for harsh sun & outdoor applications
  • Will not rot, swell, splinter or delaminate when exposed to water
  • Easy to fabricate with standard woodworking tools
  • Durable matte-textured surface on both sides


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