Solid metal
Aluminum Sign Panels
Long-term exterior panels, parking signs, regulatory signs, reflective graphics, and applications where exposed metal edges make sense.
Explore aluminum panels →Sign panels · material and system selection
Choose the Sign Panel That Fits the Job—Not Just the Lowest Price
S2 designs, produces, finishes, permits, and installs commercial sign panels and complete panel systems from our Loveland shop.
A panel is only the visible surface. The right choice also accounts for rigidity, weather, impact, light, mounting, framing, future changes, and how long the sign is expected to remain in service.
Choose a panel direction
Start with the material or system that matches the job.
These pages explain the differences in plain English. You do not need to know the final substrate before contacting us—we can help narrow it down from the location, mounting method, service life, and budget.
Lightweight + rigid
ACM Sign Panels
The general-purpose commercial workhorse for wall signs, frames, posts, monument inserts, full-color graphics, and custom shapes.
Explore ACM panels →Clear + polished
Acrylic Sign Panels
Clear, frosted, colored, layered, and translucent panels for offices, lobbies, stand-off displays, and specialty illuminated applications.
Explore acrylic panels →Impact-resistant face
Polycarbonate Sign Panels
Durable translucent faces for illuminated cabinets and other locations where impact resistance matters more than acrylic-like rigidity.
Explore polycarbonate →Smooth + machinable
PVC Signs
Lightweight interior panels, routed shapes, layered signs, displays, directories, and dimensional components with a smooth painted or graphic face.
Explore PVC signs →Temporary + economical
Coroplast Signs
Yard signs, event signs, construction directionals, temporary property signs, and high-volume short-term commercial messaging.
Explore coroplast signs →Thick + substantial
MDO Plywood Signs
Rigid framed panels with strong fastener holding for post systems, commercial real estate, development signs, and larger exterior applications.
Explore MDO signs →Night visibility
Reflective Signs
Parking, directional, safety, regulatory, and property signs designed to return approaching headlights or directed light toward the viewer.
Explore reflective signs →Complete freestanding system
Post & Panel Signs
Panels, posts, frames, footings, setbacks, permits, installation, and future face changes planned as one complete sign system.
Explore post & panel →Material comparison
Start with the environment and service life.
The table below is a practical first pass. Final selection also depends on size, support, graphics, code, and the way the panel will be changed or serviced.
| Material or system | Best known for | Watch closely |
|---|---|---|
| Solid aluminum | Long-term exterior signs, parking and regulatory panels, reflective film, exposed edges | Weight and cost rise with thickness and size; large unsupported panels still need framing. |
| ACM | Flat commercial panels with excellent stiffness-to-weight and smooth graphic surfaces | The plastic core is exposed at cut edges; it is a panel, not a structural frame. |
| Acrylic | Clear, frosted, colored, layered, and polished interior or specialty panels | More brittle than polycarbonate and needs room for thermal movement. |
| Polycarbonate | Impact-resistant translucent cabinet faces and demanding high-contact uses | More flexible and easier to scratch; face retention and expansion must be planned. |
| Expanded PVC | Smooth, lightweight, easy-to-machine interior displays and layered signs | Heat and exterior exposure can cause movement or bowing, especially in dark colors. |
| Coroplast | Economical temporary signs, yard signs, directionals, events, and real estate | Flutes, wind, stakes, edge crushing, and expected short-term service govern the build. |
| MDO plywood | Thicker framed panels with good fastener holding and substantial presence | Edges and penetrations need sealing; weight and moisture management matter. |
| Reflective graphics | Information that must return headlight or flashlight illumination toward the viewer | Reflectivity depends on light angle and does not replace an internally illuminated sign. |
| Post & panel system | Freestanding identification and advertising with replaceable faces | Setbacks, utilities, wind, footings, access, and permits belong in the same scope. |
Choose by need
The material should solve a problem the customer actually has.
A larger list of substrates does not automatically produce a better sign. These questions narrow the field quickly.
Beyond the sheet
A successful panel sign includes its frame, fasteners, edges, and future maintenance.
The substrate gets most of the attention because it is easy to name. In the field, failures are just as likely to begin at an unsupported edge, an undersized frame, a loose fastener, an unsealed penetration, a post that moved, or a graphic finish that did not match the exposure.
S2 plans the panel as one component inside a complete system. That may include a welded frame, wood or metal posts, stand-offs, wall rails, a monument opening, cabinet retainers, concealed fasteners, anti-vandal hardware, or a portable base.
When future changes are likely, the smartest detail may be the one that lets the next panel come out cleanly without rebuilding everything around it.
Face production
The graphic layer has to match the panel and the exposure.
S2 uses the appropriate combination of print, laminate, cut vinyl, paint, second-surface graphics, reflective film, routed components, and specialty face materials rather than treating every panel the same.
Printed + laminated vinyl
Useful for full-color commercial graphics. Ink, film, laminate, panel preparation, and edge conditions work together.
Cut vinyl graphics
Strong for solid-color lettering, logos, borders, regulatory copy, and information that benefits from crisp color separation.
Second-surface graphics
Applied behind clear acrylic so the face protects the graphics and the front remains smooth.
Reflective film
Returns directed light toward the viewer for parking, traffic, safety, and nighttime identification.
Painted fields
Useful when a fabricated or routed panel needs a controlled base color, edge finish, or architectural coating.
Layered components
Flat panels can carry dimensional letters, routed accents, stand-off layers, or replaceable tenant modules.
Project process
A panel project can be simple without being careless.
A small temporary sign may compress these steps. A permanent freestanding system may require site review, permits, engineering, fabrication, and installation.
Define the purpose
We identify message, location, viewing distance, expected service life, change frequency, and budget.
Review the site
Wall, frame, cabinet, posts, grade, setbacks, utilities, wind exposure, access, and permit conditions are checked.
Choose the system
Substrate, thickness, graphic method, frame, hardware, edge treatment, and installation approach are specified together.
Prepare the design
Copy hierarchy and contrast are tested at the intended scale—not only on a monitor.
Approve + permit
Final artwork and construction move through landlord or municipal review when required.
Produce the panel
Printing, laminating, cutting, routing, painting, assembly, or specialty sourcing follows the approved specification.
Install
Posts, frames, fasteners, stand-offs, cabinet retainers, or wall hardware are set for the real substrate and exposure.
Document + support
The finished work is checked and photographed; replaceable panels and future changes remain serviceable.
Price + timing
The square footage is only the beginning.
- Substrate type and thickness
- Panel dimensions and total quantity
- Single- or double-sided graphics
- Print, cut vinyl, reflective film, paint, or layered components
- Overlaminate and finish
- Routing, shape cutting, holes, or edge work
- Posts, welded frames, rails, stand-offs, or cabinet retainers
- Footings, utility conditions, and access equipment
- Landlord review, permits, and engineering
- Packaging, delivery, and installation distance
What helps S2 quote the right panel
Send the address, a photo of where it will go, the finished size if known, the message or logo, whether it is temporary or permanent, and how it should mount. If an existing frame or cabinet is being reused, include straight-on photos and opening dimensions.
That information is more useful than guessing at a material name.
Common questions
Sign panels without the material-sales fog.
What is the best material for an outdoor sign panel?
There is no single best substrate. ACM is a strong general-purpose choice for flat commercial panels, solid aluminum is useful when the panel needs metal strength or reflective graphics, MDO adds thickness and fastener holding for framed post systems, and polycarbonate is preferred for many illuminated cabinet faces. The mounting and expected service life matter as much as the printed face.
What is the difference between aluminum and ACM?
Solid aluminum is metal all the way through. ACM uses thin aluminum skins bonded to a lightweight core. ACM is flatter and lighter for its size, while solid aluminum handles exposed edges, small parking and regulatory signs, direct fastening, and reflective applications especially well.
Does S2 print directly onto every panel?
Not as a blanket rule. S2 selects the graphic process around the substrate and use. Many exterior panels receive printed or cut vinyl graphics with a compatible overlaminate; other projects use paint, second-surface graphics, reflective film, routed copy, or specialty faces. The goal is the correct finished sign, not forcing every material through one production method.
Can a sign panel be replaced without rebuilding the frame?
Often, yes. Replaceable panels are one of the main advantages of a well-designed post, wall, monument, cabinet, or tenant-sign system. We evaluate the existing opening, attachment method, frame condition, panel thickness, and future change frequency before specifying the replacement.
Do post-and-panel signs require permits?
They often do when they are permanent, large, illuminated, close to a property line, or installed in a regulated sign area. Temporary commercial real estate signs may follow different rules. S2 checks the address and handles required sign permits and engineering coordination.
How long does a sign panel last?
Service life depends on the substrate, face finish, sun exposure, wind, moisture, edge treatment, mounting, and whether the graphic layer is intended to be temporary or long term. We avoid generic lifespan promises and specify the panel around the actual project.
Can you make reflective sign panels?
Yes. Reflective film can be applied to the full background or selected graphics when nighttime visibility is needed. Reflective signage still depends on the angle and source of approaching light; it is not self-illuminating.
Do you sell raw blank sheets?
S2 is a custom sign company, not a sheet-material warehouse. Our normal work is a finished sign or complete sign system: design, substrate, graphics, framing or mounting, permitting when needed, and installation.
Start with the basics
Show us where the panel needs to work.
The location and mounting condition usually tell us more than the phrase “I need a sign board.”
- Project address
- Straight-on site or frame photo
- Approximate finished size
- Logo or exact wording
- Temporary or permanent use
- Target completion date
You do not need to identify the exact material or vinyl type before contacting us. The address, photos, goal, dimensions, and deadline are enough to begin.
Attach photos, logos, measurements, landlord criteria, and project documents above. Larger or additional files may also be emailed to hello@s2signs.com.
Page last reviewed 2026-08-04.