An honest comparison for Australian conditions — sun, salt, rain, and all.
For permanent outdoor signs in Australia, metal wins: stainless steel lasts 25+ years and aluminium 20+ years in full sun, while acrylic degrades in 5–10 and timber needs yearly sealing to reach 5–15. Acrylic and timber cost less upfront and suit indoor, covered, or short-term use — metal costs more once, then asks nothing of you.
| Factor | Metal (2 mm laser-cut) | Acrylic | Timber |
|---|---|---|---|
| Outdoor lifespan | 10–25+ years depending on metal | 5–10 years before UV damage shows | 5–15 years with regular sealing |
| UV resistance | Excellent — metal does not fade or degrade in sun | Poor to fair — yellows, dulls, and crazes over time | Fair — fades and greys without UV-stable coating |
| Moisture & rain | Stainless and aluminium: excellent. Mild steel: controlled patina | Good — waterproof, but edges can craze | Poor to fair — swells, cups, and rots if sealing lapses |
| Typical price (600 × 200 mm class) | $99 – $169 AUD inc GST | $40 – $90 AUD | $60 – $150 AUD |
| Weight at 600 × 200 mm | 0.65 kg aluminium, ~1.9 kg steel (2 mm) | ~0.4 kg (3 mm cast acrylic) | 0.5 – 1.5 kg depending on species |
| Mounting | Screws, anchors, or adhesive (aluminium) | Adhesive strips or small screws | Screws into studs or masonry |
| Look | Industrial, premium, permanent; raw, brushed, or patina | Glossy, modern, bold colour options | Warm, natural, rustic; visible grain |
| Maintenance | Occasional wash; none for stainless or aluminium | Gentle cleaning — scratches easily | Re-oil or re-seal every 1–2 years outdoors |
| Best environment | Anywhere, including full sun and coastal (right metal) | Indoors or covered outdoor areas | Covered outdoor areas, rural and rustic settings |
Metal prices are from our live pricing engine; acrylic and timber figures are typical Australian market ranges for comparable sizes.
Australian conditions are brutal on signage. The UV index hits extreme levels most of the year, coastal air carries salt, and summer storms test every fixing. Here is how each material copes.
Metal. The benchmark. Stainless steel is effectively immune to UV and rain and lasts 25+ years. Aluminium never rusts and is the pick within a kilometre of the surf — 20+ years, even coastal. Mild steel rusts on purpose: the patina stabilises into a protective skin and the sign runs 10–20+ years, looking better as it goes. Full detail in our durability guide.
Acrylic. Waterproof, but UV is its enemy. In full sun, acrylic dulls, yellows, and develops fine surface crazing within 5–10 years — sooner for cheap extruded sheet. Under cover or indoors, that clock effectively stops, which is where acrylic makes sense.
Timber. The neediest of the three. Sun greys it, rain swells it, and the wet-dry cycle cups and splits boards over time. A sealed hardwood or marine-ply sign in a sheltered spot can look great for 5–15 years — but only if you re-oil or re-seal every year or two. Skip the maintenance and the timeline halves.
Acrylic wins the sticker-price contest and usually loses the long game. Divide the price by the realistic outdoor lifespan and the picture flips:
Indoors the maths changes: nothing weathers, so buy on look and budget. Outdoors — especially full sun or coastal — metal is both the longest-lived and, per year, the cheapest.
House number. Metal. It is a permanent fixture in all weather, and at this size the material price gap is a few dollars. Aluminium or stainless near the coast, mild steel for a rustic entry. A 600 × 200 mm house number sign starts at $99 including GST — see our size guide for proportions.
Business fascia. Depends on the building. Indoors or under an awning, acrylic lettering is a legitimate budget choice with bold colour. Exposed to weather, go metal — a faded, crazed acrylic sign above the door costs you more in impression than it saved in dollars. Large illuminated or structural fascia work belongs with a local fabricator either way. More ideas in our business signs section.
Farm gate. Metal, no contest. Gates cop full sun, stock rub, and zero maintenance. Mild steel suits the setting — the patina looks right on a fence line — and 2 mm sheet shrugs off bumps that would crack acrylic. See farm signs.
Wedding. Any of them — this is a looks decision, not a durability one. Timber and acrylic photograph beautifully for a one-day event and cost less. Metal costs more but survives the day as a keepsake worth hanging at home afterwards. Browse wedding signs for inspiration.
The hybrid option. Laser-cut metal lettering on a timber backing board gives you warmth up close and lettering that never fades. Keep the timber under cover and it will hold up for years.
Design it in the browser and see the exact price before you commit — from $79 AUD including GST, cut in Australia and shipped Australia-wide.
By the Metal Marvel Team
Last updated: August 2026
Dig into mild steel vs stainless vs aluminium, check exact metal sign pricing, or read the buyer's guide to custom metal signs in Australia.