Acrylic Comparisons — vs Polycarbonate, PETG, ABS, and Cast vs Extruded

Acrylic is the right transparent plastic for many applications — but not all. Polycarbonate (Lexan) wins when impact resistance is the priority. PETG offers better chemical resistance and thermoformability. ABS is the default opaque enclosure material when acrylic's optical properties are not needed. This page indexes those comparisons with decision criteria and links to detailed versus pages.

At a glance:

• Acrylic vs. Polycarbonate: acrylic wins on optical clarity and UV stability; PC wins on impact resistance
• Acrylic vs. PETG: acrylic wins on clarity and hardness; PETG wins on chemical resistance and forming
• Acrylic vs. ABS: acrylic wins when transparency matters; ABS wins for opaque enclosures and impact
• Cast vs. Extruded Acrylic: cast for laser cutting and bonding; extruded for forming and cost
• No single material wins every category — match properties to requirements

Acrylic vs. Polycarbonate (Lexan)

This is the most common comparison in transparent plastics. Acrylic and polycarbonate are both clear, lightweight glazing materials, but they have opposite strengths.

Key Differences

When to Choose Acrylic

• Outdoor signage, skylights, or glazing where UV stability is needed without coatings
• Laser-cut display and signage (cast acrylic produces polished laser edges)
• Museum cases and artwork framing (higher optical clarity, no yellowing)
• Any application where clarity, aesthetics, and polish matter more than impact

When to Choose Polycarbonate

• Machine guards, safety shields, and riot barriers where impact resistance is mandatory
• High-temperature enclosures or fixtures near heat sources (HDT 270°F vs. acrylic's 200°F)
• Applications requiring UL 94 V-2 or V-0 flame rating
• Hot-line bending into complex curves (PC bends at lower stress)

For the detailed specification-level breakdown, see the acrylic vs. polycarbonate comparison page.

Acrylic vs. PETG

PETG (glycol-modified polyethylene terephthalate) is frequently specified as an alternative to both acrylic and polycarbonate. It is tougher than acrylic, easier to thermoform than polycarbonate, and offers better chemical resistance than either.

When to Choose Acrylic over PETG

• Higher optical clarity (92% vs. 87%) is needed
• Solvent bonding is required (Weld-On 4 works on acrylic; PETG has no equivalent)
• Maximum continuous temperature above 158°F
• Outdoor UV exposure without coating

When to Choose PETG over Acrylic

• Better chemical resistance is needed (disinfectants, alcohols)
• Lower thermoforming temperature and tooling cost are advantageous
• Medical or food-contact applications where inherent FDA compliance simplifies procurement
• Moderate impact resistance is needed at a similar price point to acrylic

For detailed specifications, see the PET and PETG materials guide.

Acrylic vs. ABS

ABS (acrylonitrile-butadiene-styrene) is the default opaque engineering plastic for enclosures, housings, and formed parts. Comparing acrylic to ABS is usually only relevant when deciding between a clear/optical approach and an opaque/structural one.

When to Use Acrylic Instead of ABS

• Transparency or translucency is required
• Outdoor application (ABS yellows and chalks in UV without coating)
• Optical quality matters (retail display, signage)

When to Use ABS Instead of Acrylic

• Opaque housing or enclosure — color, paintability, and screw bosses matter
• Higher impact resistance needed at lower cost
• Complex thermoformed shapes with detail features
• ABS-FR (flame-retardant) rating required (UL 94 V-0)

See the ABS materials guide for full ABS specifications and grade comparisons.

Cast Acrylic vs. Extruded Acrylic

Within acrylic itself, cast and extruded grades serve different fabrication methods. This is less about choosing between competing materials and more about knowing which form of acrylic matches your process.

For a complete grade-by-grade breakdown including brand names (Plexiglas, Acrylite GP, Optix), see the acrylic grades page.

Acrylic vs. Glass

While glass isn't a plastic, buyers evaluating acrylic for glazing or display applications frequently ask how the two compare directly.

Acrylic's main advantages over glass are weight (roughly half), machinability (cut to any shape with standard tooling), and shatter behavior (large pieces rather than glass shards). The main disadvantages are scratch susceptibility and thermal expansion — glass expands only one-eighth as much per degree, making acrylic's expansion a design factor in large installations.

For most retail display, signage, and glazing applications, acrylic is the practical choice over glass. For scratch-critical surfaces in high-traffic environments (countertops, high-use display shelves), glass remains superior on that single axis.

Acrylic vs. Polycarbonate for Specific Fabrication Processes

Beyond the property comparison, fabrication method often drives the material decision:

This table explains why sign shops and display fabricators overwhelmingly use acrylic despite polycarbonate's impact advantage. The ability to laser cut to polished edges and solvent bond clean joints is simply not available in polycarbonate.

For the full specification comparison with data tables, see the acrylic vs. polycarbonate page.

Summary Decision Matrix

Review the full acrylic buyer's guide for a complete introduction to grades, forms, and applications, or visit the acrylic line card for stock and pricing.

More related guides

Cross-cluster suggestions to help shoppers and engineers explore adjacent topics:

Applications

• Machine Guards

Compare to other materials

• Polycarbonate Vs. Acrylic
• Acrylic Vs. Pet Petg
• Acrylic Vs. Abs

Frequently asked questions — Acrylic FAQ