Acrylic vs. Polycarbonate: Which Sheet Material Do You Need?

Acrylic and polycarbonate are both clear, rigid thermoplastic sheets. They look similar and overlap in many applications. The differences matter when your project involves impact, heat, precision fabrication, or outdoor exposure.

Clarity and Light Transmittance

Acrylic transmits approximately 92% of visible light — more than glass. Polycarbonate transmits around 88%. For display cases, signage, and glazing where maximum clarity matters, acrylic is the cleaner choice.

Impact Resistance and Strength

Polycarbonate is extremely impact-resistant — roughly 250 times the impact resistance of glass — and bends rather than shatters. Acrylic is approximately 10 times the impact resistance of glass, meaningfully better than glass but far below polycarbonate; under sharp impact it can crack. For applications where breakage is a safety concern, choose polycarbonate.

Rigidity and Stiffness

Acrylic is stiffer at the same thickness — preferable for shelving, display pedestals, and framed panels where deflection is a problem. Polycarbonate is more flexible.

Temperature Range

Acrylic is stable from approximately -30°F to 190°F. Polycarbonate handles up to approximately 240°F, suitable for higher-heat environments.

Scratch Resistance

Acrylic is more scratch-resistant and holds up better to cleaning and everyday contact. Polycarbonate scratches more easily and is often sold with a hard-coat surface. Avoid abrasive cleaners on either.

Cutting and Drilling

Both cut with standard saws/routers using a fine-tooth blade. Acrylic scores and snaps cleanly at thinner gauges and can be laser-cut to a polished edge; polycarbonate tends to chip or string and needs sharper tooling. For drilling, both need slow speeds, a sharp bit, and backing.

Polishing and Edge Finishing

Acrylic edges can be flame-polished or buffed to a glossy, glass-like finish — standard for display cases and enclosures. Polycarbonate cannot be flame-polished. If finished edge appearance matters, choose acrylic.

Bending and Thermoforming

Both can be heat-formed. Acrylic bends cleanly at a single temperature; polycarbonate needs more even heat but is more forgiving and tougher for complex shapes.

Chemical Resistance

Polycarbonate resists a broader range of chemicals. Acrylic is vulnerable to aromatic solvents (acetone, benzene, some adhesives), which can craze or dissolve it.

Outdoor and UV Exposure

Uncoated acrylic has good natural UV resistance and resists yellowing. Uncoated polycarbonate yellows faster unless UV-stabilized.

Which Should I Choose?

Short version: if it needs to be clear, rigid, scratch-resistant, and good-looking — and impact isn't a concern — use acrylic. If it must survive impact without shattering or handle sustained heat above 190°F, use polycarbonate.

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