PROBOND ClassicX21® is a great intermediate panel for all types of general signage applications.

Available in a wide range of sizes with a 0.21mm skin thickness, the PROBOND ClassicX21® range is the ideal choice for every day panel requirements for sign-makers.
It is suitable for CNC routing and folding and comes with clear protection film for quick and easy colour identification.

  • ISO9001
  • HenkelAdhesives
  • PPGIndustries
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Technical information

Panel Properties

Panel Thickness (mm)3mm
Skin Thickness (mm)0.21mm
Weight (kg/m2)4.25 kg
Sound Absorption0.05
Sound Attenuation24
Water Absorption % by Volume0.01
Thermal Performance R Values0.008
Core CompositionLDPE
Tensile Strength of Aluminium Layers32MPa

Dimensional Tolerances

Panel Thickness (mm)3 mm
Width (mm)-0 +2 (+/- 0.2)
Length (mm)-0 +3 (+/- 0.2)
Diagonal-0 +5 (+/- 0.2)
Thermal Expansion2.4mm/m @100°C temp difference
Aluminium Thickness0.21 mm

Surface Properties

Paint Thickness (microns)18±1μm
Pencil Hardness2H
Toughness of Coating≤2T
Temperature Resistance-50℃ -80℃
Impact Strength (kg/CM2)30kg/cm2. No crack
Boiling Water ResistanceBoiling for 2hrs without change
Acid ResistanceImmerse surface with 2%HCL(v/v) for 24H without change
Alkali ResistanceImmerse surface with 2%NaOH(m/m) for 24H without change
Oil ResistanceImmerse surface with 20# engine oil for 24H without change
Solvent ResistanceClean 100 times with Methyl Ethyl Ketone (MEK) without change
Peel Strength5.5 N/mm

Size & Colour Availabilities

Gloss White
Matt White
Gloss Jet Black
Matt Jet Black
Gloss Traffic Yellow
Matt Traffic Yellow
Gloss Bright Orange
Matt Bright Orange
Gloss Traffic Red
Matt Traffic Red
Gloss Ultramarine Blue
Matt Ultramarine Blue

Product downloads

PROBOND ClassicX21 Overview
Product Overview

PROBOND ClassicX21® is a great intermediate panel for all types of general signage applications

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Technical Data

Technical Data and Properties of PROBOND ClassicX21®

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PROBOND ClassicX21® Size Availabilities

Panel colours and size availabilities

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Material Safety Data Sheet for PROBOND ClassicX21®

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Your guide to processing PROBOND ClassicX21®

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Typical Specification

Specify PROBOND ClassicX21®

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Request a sample

If you’d like to request a sample, use our online colour selector to choose up to five colour samples.