What materials are best for outdoor safety signs?

For outdoor applications we recommend Aluminium Sheet, Aluminium Composite Material (ACM) or Polypropylene, depending on the environment. Solid aluminium provides the highest level of durability and corrosion resistance, ACM offers an excellent balance of strength, weight and value, while polypropylene is ideal for temporary outdoor signage where a lightweight solution is required.

What materials are best for indoor safety signs?

Foam PVC and polypropylene are popular choices for indoor safety signs because they are lightweight, cost-effective and provide excellent print quality. They are commonly used in warehouses, offices, schools, factories and commercial buildings.

What is the difference between ACM and solid aluminium?

Aluminium Composite Material (ACM), sometimes referred to as ACP, consists of two thin aluminium skins bonded to a polyethylene core. It is lightweight, rigid and widely used throughout the signage industry. Solid aluminium is manufactured from a single sheet of aluminium, making it more impact resistant and better suited to harsh outdoor environments, coastal locations and applications requiring maximum longevity.

Which material is the strongest?

In terms of strength and durability the general order is: Solid Aluminium, Aluminium Composite Material (ACM), Foam PVC and Polypropylene. The best material ultimately depends on the environment, expected lifespan and installation method.

Why should I choose reflective safety signs?

Reflective safety signs improve visibility during low-light conditions by reflecting light back towards its source. They are commonly used for regulatory signage, traffic management, construction sites, car parks, emergency exits and locations where signs need to remain visible at night.

Do your reflective safety signs comply with Australian Standards?

Our reflective materials are available in grades manufactured to meet the requirements of AS/NZS 1906.1:2017 for retroreflective materials where applicable. If your project requires a particular reflective classification, please let us know and we can recommend the appropriate material for your application.

Why can I see lines on some reflective signs?

Engineering Grade (Class 100) reflective material has a smooth appearance with no visible prism pattern. Higher-performance prismatic reflective materials, such as Class 400 and Class 1100, contain microscopic prisms that may be visible when viewed up close. This is a normal characteristic of the material and contributes to its increased reflectivity.

Which reflective grade should I choose?

Class 100 is suitable for general commercial and private property signage where good night-time visibility is required. Class 400 (or 400T) provides significantly higher reflectivity and is commonly used for public road signage and traffic management. Class 1100 offers the highest level of retroreflectivity for critical road safety applications including highways, intersections and high-speed environments.

Can I use any reflective sign on public roads?

No. Road authorities may specify minimum reflective grades, colours, sizes and sign designs. Requirements vary between states, councils and project specifications. Always confirm the required standard with the relevant road authority before purchasing.

Do you manufacture custom safety signs?

Yes. Sign Portal manufactures custom safety signs in-house. We can produce virtually any size, material or design, including company branding, site-specific information, custom wording and logos.

What fixing options are available?

Our safety signs can be supplied with pre-drilled holes, rounded corners, adhesive backing, cable tie holes or left blank depending on your installation requirements.

How long will my safety signs last?

The lifespan depends on the material, installation location and exposure to weather. Solid aluminium and ACM signs can provide many years of outdoor service when correctly installed, while indoor materials such as Foam PVC provide excellent longevity in protected environments.

Can you help me choose the right material?

Absolutely. If you're unsure which material best suits your application, our experienced team can recommend the most appropriate option based on your location, budget, installation method and expected lifespan.

Do your safety signs comply with Australian Standards?

Many safety signs are designed to align with the relevant Australian Standards; however, the applicable requirements vary depending on the type of sign and its intended use. If your project requires compliance with a particular Australian Standard or industry specification, please let us know so we can recommend the appropriate product.

Do I need approval before installing safety signs?

Some regulated environments, roadways and workplaces may require specific signage, sizes or installation methods. We recommend checking the applicable workplace, council or regulatory requirements before installation where compliance is mandatory.

Danger - Caustic Sign

SPDA224

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Price per sign gets better as you increase the quantity.

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Compliant with AS 1319. Colours, layout and pictogram meet the Australian standard for safety signs in the workplace.

Australian Made

Designed & produced in-house in QLD.

Fast Delivery

Australia-wide shipping from Brisbane.

100% Satisfaction

Satisfaction guaranteed. Love it or return it.

Expert Support

Need help? We’re here to assist: Contact us

Request a custom version

Danger Caustic Sign

The Danger Caustic Sign warns of areas where caustic substances are stored, handled or used. It is suitable for chemical stores, processing plant, cleaning systems and industrial locations where corrosive alkaline materials may present a serious hazard.

Placement

Install at storage areas, access points and process locations identified through the workplace risk assessment so the warning is visible before contact with the hazard.

Material selection

Choose a sign material that suits the mounting surface, cleaning regime, environmental exposure and required viewing distance.

Chemical safety

Signage should complement correct container labelling, safety data sheets, PPE, segregation, spill controls and emergency procedures for the specific caustic substance in use.

Australian made by Sign Portal.

Material Comparison

Compare Australia's most popular sign materials to choose the right option for your application.

	Corflute	Stickers	Foam PVC	Polypropylene	ACP Most Popular	Solid Aluminium

Value for MoneyCost effectiveness
UV ResistanceResists sun fading
Impact ResistanceResists knocks, bumps & impacts
Chemical ResistanceResists chemicals & solvents
Laminate Protection & FinishProtective laminate available	No	Yes	No	No	Yes	Yes
Best Used For	Real Estate Construction Events	Equipment Labels Safety Labels Smooth Surfaces	Indoor Signs Retail Office Signs	Chemical Areas Food Processing Industrial	Buildings Shopfronts Commercial	Industrial Mining Long-term Outdoor
Typical Outdoor Lifespan*Based on typical Australian outdoor conditions	1 Year	3 Years	3 Years	3 Years	5 Years	7 Years
Material ThicknessThickness available	5 mm	0.1 mm	5 mm	1.3 mm	3 mm	1.6 mm

Outdoor lifespan is based on typical Australian conditions. Actual performance may vary depending on installation and environmental exposure.

Order Processing & Delivery Times
At Sign Portal, we strive to deliver your custom signage orders as quickly and efficiently as possible. Once your order is placed and the design is approved, we typically process and ship your order within 7 days however this can vary on the size and requirements of the order.. Shipping times may vary depending on the complexity of the order and delivery location.

Shipping Methods & Costs
We offer several shipping methods to meet your needs. Shipping costs are calculated based on the size, weight, and destination of your order. You will be able to review your shipping costs during checkout before completing your purchase.

Standard Shipping
We use trusted carriers, including TNT, FEDEX, Startrack (Australia Post) and Aramex to ensure reliable and timely delivery of your products. Standard shipping times typically range from 1 day to 10 business days depending on your location.

Expedited Shipping
If you need your signage sooner, we offer expedited shipping options. Please contact us directly to inquire about available faster shipping options, and we will do our best to accommodate your request.

Order Tracking
Once your order has shipped, you will receive a confirmation email with tracking information, so you can monitor the status of your delivery.

International Shipping
At this time, we only offer domestic shipping within Australia. If you are interested in international shipping, please reach out to us, and we will do our best to find a suitable solution for your needs.

Delivery Delays
While we strive to deliver all orders within the estimated time frame, external factors such as weather conditions, shipping carrier delays, or customs processing may occasionally cause delays. Sign Portal is not responsible for any shipping delays beyond our control.

Shipping Address Accuracy
Please ensure that the shipping address you provide is correct and complete. We are not responsible for delays or delivery issues caused by incorrect or incomplete shipping addresses.

Shipping Damage
If your item arrives damaged, please contact us immediately at info@signportal.com.au. We will work with you to resolve the issue and ensure that you receive a replacement or appropriate resolution.

Shipping Restrictions
Certain products may have shipping restrictions due to size or weight. If your order is affected, we will notify you as soon as possible and discuss alternative shipping arrangements.

Returns & Shipping Costs
Please refer to our Refund Policy for information about returns and the associated shipping costs. Note that return shipping costs are the responsibility of the customer unless the item is defective or incorrect.

Returns

At Sign Portal, we understand that sometimes issues may arise with your custom signage orders. As our products are tailored specifically to your requirements, we are unable to offer refunds or exchanges for incorrect orders. However, if your item is found to be faulty or was supplied incorrectly, we are happy to accept returns within 30 days of receipt.

To be eligible for a return, your item must remain unused and in the same condition as when it was delivered. The item should also be in its original packaging.

Please include a receipt or proof of purchase when initiating the return.

Proofing Approval

Prior to production, we provide a digital proof of your design for approval. Once you approve the proof and confirm that the design is correct, we move forward with manufacturing. It is your responsibility to carefully review the proof and ensure all details are accurate, including text, colors, and dimensions. After approval, we cannot be held liable for any mistakes or changes, and refunds will not be issued based on customer errors in the proofing process.

Conditions for Partial Refunds (if applicable)

Refunds or exchanges will not be issued in the following circumstances:

The item is no longer in its original condition, has been damaged, or is missing parts due to reasons not caused by us.
Returns made more than 30 days after the item has been delivered.

Refund Process (if applicable)

Once we have received and inspected your returned item, we will inform you via email whether your refund has been approved or rejected. If your return is accepted, the refund will be processed and credited to your original method of payment within 10 business days.

Missing or Delayed Refunds (if applicable)

If you have not yet received your refund, please consider these steps:

Double-check your bank account for the refund.
Contact your credit card company as it may take additional time for the refund to appear in your account.
Reach out to your bank, as processing times can sometimes delay the refund.
If after completing these steps you still haven’t received your refund, please contact us at [email address].

Return Shipping

If you need to return a product, please send it to:

Sign Portal
21/116 Lipscombe Rd
Deception Bay QLD, 4508

You will be responsible for covering the return shipping costs. These shipping fees are non-refundable, and the cost will be deducted from your refund if one is issued.

Depending on your location, the time it may take for the exchanged product to arrive could vary.

For Returns Over $100

For returns valued over $100, we recommend using a trackable shipping service or purchasing shipping insurance. We cannot guarantee receipt of returned items without tracking or insurance.