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Can acrylic go in sunlight ?

Unthika Roekwibunsi

In short: Yes, acrylic can be used in sunlight if you choose UV-stabilized sheets—ideally Cast Acrylic. This grade withstands sun and rain, stays clear, non-yellowing, and non-brittle. For indoor projects, both Cast and Extruded acrylic work depending on budget and the finish you want.

UV printing on acrylic for corporate signs and lightboxes

Choose the Right Grade: Outdoor vs Indoor

Outdoor

  • Material: Use Cast Acrylic (UV-stabilized)
  • Typical thickness (sign faces): 3–5 mm, depending on panel size and internal bracing
  • Install for durability: Leave an expansion gap of 2–5 mm, drill oversized holes, add rubber/nylon washers, and seal with neutral-cure silicone
  • Graphics/printing: Use outdoor-grade translucent films or UV printing with weather sealing and proper ventilation inside the lightbox
Corporate acrylic sign with UV print, installed on exterior wall

Acrylic lightbox face, evenly illuminated

Browse all acrylic signage products

Indoor

  • Material: Cast or Extruded Acrylic (more budget-friendly)
  • Typical thickness: Table signs/frames 2–3 mm | Wall signs/lightbox faces 3–4 mm
  • Premium look: Choose Cast Acrylic for superior clarity and polished edges
Acrylic dimensional letters mounted on an interior wall

Clean, modern wall sign made from acrylic

Care & Maintenance

  • Clean with mild soapy water + a soft cloth
  • Avoid thinners/acetone or ammonia-based cleaners (they can cause crazing)
  • Keep the protective film on until installation is complete

FAQs

Will outdoor acrylic turn yellow?

UV-stabilized cast acrylic stays clear far longer than standard grades and is suitable for long-term outdoor use.

Why does a panel sag?

Panels that are too thin, have long spans, or over-tightened fasteners can sag. Increase thickness/bracing and use oversized holes with washers.

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