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Foam Substrates

Core Foam Sign Board Sheets, HDU Sign Foam Boards & More

Grimco is your source for all types of foam sign boards and HDU sign foam. From economical clay-coated paper with foam centers to more durable foam core signs featuring poly-coated and styrene surfaces, our service and selection leads the industry. Most substrates are available in 4x8 foam core boards with some sizes coming in an even broader range of sizes.

UltraBoard Classic
UltraBoard Classic

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  • Rigid polystyrene foam core board
  • High impact, litho-grade polystyrene facers
  • Lightweight, strong, & warp-resistant
  • Adhesive ensures flatness and rigidity
InSite® Reveal® Foam Board
InSite® Reveal® Foam Board

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  • Reveal® core to retain thickness
  • Warp-resistant, dent-resistant, UV stabilized
  • White Point Management System for color balance
  • Paper face, polystyrene core board
  • Bright, 92 white point
  • Excellent print quality, ink adhesion
  • High tack or heat activated models
Duna CORAFOAM HDU 15# Foam Core Boards
Duna CORAFOAM HDU 15# Foam Core Boards

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  • High-density, rigid polyurethane foam
  • 15lb per ft density
  • ¾” up to 2” thicknesses
  • Lifetime warranty outdoor
Duna CORAFOAM HDU 20# Foam Core Boards
Duna CORAFOAM HDU 20# Foam Core Boards

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  • High density, rigid polyurethane foam
  • 20lbs per ft density
  • ¾” up to 2” thickness
  • Lifetime warranty outdoor
Duratex EcoDisplay Board
Duratex EcoDisplay Board

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  • 100% recyclable display board
  • Wood pulp, water & starch construction
  • Ultra-bright 94 white point
  • Excellent print quality
Duratex Foamboard Heavy-Duty
Duratex Foamboard Heavy-Duty

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  • Highly durable, paper-faced foamboard
  • Crush-resistant core
  • Warm, 90+ white point
  • Digital and screen print capable
Gatorfoam
Gatorfoam

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  • Lightweight, durable foam core board
  • Polystyrene core, Luxcell® wood-fiber facings
  • High impact resistance, edges will not crimp
  • Can be direct printed or painted
INFINITY®
INFINITY®

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  • Printable foam board with high white point
  • Styrene-faced, UV resistant
  • Smooth surface requires 7% less ink
  • 2.5x the density of competing foams
  • 3D cold-bend capability
InSite® Reveal® Self Adhesive
InSite® Reveal® Self Adhesive

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  • 3/16” thick, non-pillowing foamboard
  • Pressure-sensitive print mounting adhesive
  • Clay coated paper on non-adhesive side.
Insite® Canvas
Insite® Canvas

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  • 3/16" thick Polystyrene core foamboard
  • Bright white, faux canvas face
  • Embossed texture finish
  • Clean v-cuts, easy bending
UltraBoard Core
UltraBoard Core

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  • Polystyrene foam core board
  • 3/16” thickness, black and white options
  • 12 point clay coated paper liner
  • Easy conversion with most cutting methods
UltraBoard Core Peel N' Stick
UltraBoard Core Peel N' Stick

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  • 3/16" thick polystyrene foam core board
  • Peel & Stick, high-tack adhesive
  • White liner, color neutral mounting
  • Clay-coated paper facers
UltraBoard DP
UltraBoard DP

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  • Rigid polystyrene foam core board
  • Designed to be used with flatbed printers
  • Bright white surface, excellent image quality
  • ½” and 3/16” thicknesses available
UltraBoard Mount
UltraBoard Mount

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  • Rigid polystyrene foam core
  • Coated surface, mount prints with ease
  • 18 point Poly coated Kraft paper face
  • Easy fabrication with most cutting methods
UltraBoard Mount Peel N' Stick
UltraBoard Mount Peel N' Stick

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  • Rigid polystyrene foam core board
  • High tack, peel & stick adhesive
  • Mount prints with ease
  • Coated Kraft paper facers