Polycarbonate vs Acrylic Sheet: Which Is Better? Complete Comparison Guide 2026
Impact resistance, UV stability, optical clarity, machinability, and cost — a data-driven comparison to help you choose the right material
Polycarbonate and acrylic (PMMA) are the two most common transparent plastic sheet materials in industrial, construction, and commercial applications. They overlap in many uses but have very different performance profiles. Choosing the wrong material leads to early failure — acrylic shatters in impact applications; polycarbonate yellows faster without proper UV coating in some outdoor uses. This guide compares every key property with real test data.
| Property | Polycarbonate (PC) | Acrylic (PMMA) | Winner |
|---|---|---|---|
| Impact resistance (Izod notched) | 600–900 J/m (ASTM D256) | 14–21 J/m (ASTM D256) | PC (30–40× stronger) |
| Tensile strength | 55–75 MPa | 60–80 MPa | Comparable |
| UV resistance (uncoated, outdoor) | Yellows within 2–5 years | Stable for 10+ years (outdoor grade) | Acrylic |
| UV resistance (UV co-extrusion coated PC) | 10-year warranty; negligible yellowing | Good outdoor grade | Comparable with UV-coated PC |
| Optical clarity (light transmittance) | 88–90% (3mm solid, clear) | 92–93% (3mm clear) | Acrylic (slightly clearer) |
| Scratch resistance | Moderate (easily scratched) | Good (higher surface hardness) | Acrylic |
| Scratch resistance (hard-coated PC) | Excellent — comparable to glass | Good | PC with hard coat |
| Temperature resistance (HDT) | ~130–140°C | ~80–95°C | PC |
| Flammability (UL94) | V-0, V-2, HB grades available | HB only (most grades) | PC (FR grades) |
| Chemical resistance | Poor to strong solvents, fuels | Poor to many organic solvents | Both limited; PC slightly worse |
| Machinability (cutting, drilling) | Excellent — no cracking tendency | Good — brittle at edges if incorrect tool | PC |
| Thermoforming | Excellent; wide forming window | Excellent; easier forming at lower temps | Both suitable |
| Price (clear, 3mm, ex-factory China) | $8–14/m² (solid PC) | $6–11/m² (extruded); $9–16/m² (cast) | Comparable; acrylic slightly cheaper for standard grades |
| Weight (density) | 1.2 g/cm³ | 1.19 g/cm³ | Essentially identical |
- Safety glazing & machine guards — PC’s 30–40× higher impact resistance makes it the only safe choice; acrylic shatters under impact (fragments can injure)
- Outdoor structural glazing (roofing, canopies) — with UV co-extrusion coating; PC’s flexibility absorbs wind and thermal expansion; acrylic cracks
- Greenhouses — multiwall PC panels provide far better thermal insulation than acrylic; also far higher hail impact resistance
- Automotive & transport — lightweight, IATF 16949 certifiable; acrylic not used in automotive glazing
- Electrical enclosures & EV components — PC available in UL94 V-0 flame-retardant grade; acrylic not available in V-0
- High-temperature environments — PC retains properties to ~130°C; acrylic softens at ~80°C
- Display cases & indoor signage — acrylic’s superior optical clarity (92–93% vs 88–90%) and scratch resistance make it preferred for point-of-sale and retail displays
- Long-term outdoor signage (unfaced) — uncoated acrylic maintains outdoor clarity for 10+ years; uncoated PC yellows in 2–5 years
- Aquariums & water tanks — acrylic’s better chemical resistance to water and chlorine; cast acrylic bonds better with solvent cements for tank construction
- Art & decorative applications — cast acrylic offers optical purity, brilliant colors, and easier polishing of edges
- Cost-sensitive indoor applications — where impact risk is low, extruded acrylic is marginally cheaper than equivalent PC sheet
| Product | Grade / Type | Key Data Available |
|---|---|---|
| Solid Polycarbonate Sheet | Clear, UV-coated, FR (V-0/V-2), hard-coated, anti-static | ASTM D256, D638, D1003, UL94 per grade |
| Multiwall PC Sheet | Twin-wall, triple-wall, five-wall; clear, opal, diffuse | Light transmittance, U-value, EN 16153 data |
| Corrugated PC Sheet | Standard corrugated, tile-profile; clear, opal, bronze | Impact data, UV warranty documentation |
| Cast Acrylic Sheet | Clear, colored, opal; optical grade | Light transmittance, tensile data per color |
| Extruded Acrylic Sheet | Clear, standard grade; cost-optimized | Standard property data sheet |
Yes, significantly. Polycarbonate has an Izod notched impact resistance of 600–900 J/m (ASTM D256), while acrylic (PMMA) is 14–21 J/m — making PC approximately 30–40× stronger in impact. Acrylic is brittle and will shatter under impact; polycarbonate may crack under extreme force but does not shatter into sharp fragments. For any application where impact resistance is critical — machine guards, safety glazing, transport — polycarbonate is the correct choice.
Uncoated polycarbonate yellows outdoors within 2–5 years. Outdoor-grade acrylic (GS / XT grades) maintains clarity for 10+ years uncoated. However, UV co-extrusion coated polycarbonate (Bakway standard on all outdoor grades) significantly reduces yellowing and carries a 10-year UV warranty — making it competitive with acrylic for outdoor applications. For uncoated outdoor use, acrylic has a clear advantage. For coated PC, performance is comparable for most 10–15 year lifespans.
Acrylic is slightly clearer: 92–93% light transmittance (3mm clear) vs 88–90% for polycarbonate (ASTM D1003). For most applications, this difference is not visually noticeable. For precision optical applications where maximum clarity matters — display cases, optical lenses, museum displays — acrylic or optical-grade PC is specified. Bakway offers optical-grade polycarbonate with transmittance >91% for demanding optical applications.
Polycarbonate and acrylic are priced comparably. Extruded acrylic is slightly cheaper per m² than standard solid PC at equivalent thicknesses. Cast acrylic (higher optical quality) is comparable to or slightly more expensive than solid PC. UV-coated PC for outdoor applications adds a premium over extruded acrylic but is the correct material specification — replacing yellowed PC sheet prematurely costs more than the initial premium.
Acrylic can be used for flat greenhouse glazing panels (single-layer), but is not a good alternative to multiwall polycarbonate for commercial greenhouses. Polycarbonate multiwall panels have significantly better thermal insulation (U-value 1.7–3.9 W/m²K depending on thickness) and dramatically higher hail/impact resistance. Multiwall PC sheets are the industry standard for commercial greenhouse construction globally.
Polycarbonate is generally easier to machine. PC cuts cleanly with standard carbide tooling and does not crack from machining stress. Acrylic can chip and crack at edges if feed rate, tool sharpness, or cooling is incorrect — especially cast acrylic, which is more brittle than extruded. Both materials can be drilled, routed, and cut with proper technique; PC has a wider error tolerance in machining.
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FAQ
Which is stronger, polycarbonate or acrylic?
Polycarbonate is roughly 200× more impact resistant than glass and about 30× stronger than acrylic. Acrylic cracks on impact; polycarbonate flexes and recovers.
Is acrylic cheaper than polycarbonate?
Yes, acrylic is typically 20–30% cheaper per sheet. But acrylic scratches and yellows faster outdoors, so polycarbonate often wins on lifetime cost for glazing.
Can acrylic be used outdoors?
Only with care: acrylic degrades under UV and is brittle in cold weather. For outdoor roofing, greenhouses and signage exposed to sun, polycarbonate is the safer choice.
Which material is easier to cut and machine?
Both cut well with standard tools. Acrylic is easier to laser-cut and edge-polish; polycarbonate is tougher for CNC routing and drilling without cracking.
Polycarbonate or acrylic for machine guards?
Polycarbonate — it meets impact safety standards (e.g. ISO 14120) where acrylic fails. Use hard-coated PC where surface scratching is a concern.