Compression molded vs. photopolymer

A long-established process with well-known limitations.

Photopolymer ADA signs are made by exposing a UV-sensitive resin to light through a film negative, building up raised characters from the resin. The process has been used for decades and produces a consistent tactile result — but the construction is still applied, not integral.

Compression Molded (CMA)

Single-piece acrylic — no layers, no bonds, no interfaces
Interior and exterior rated equally
Lifetime warranty
No delamination risk between substrate and character layer
Full color options through 2nd surface print and embed

Photopolymer

Resin character layer bonded to a substrate — a bond that can fail
Exterior performance varies; many manufacturers limit outdoor use
Warranty typically excludes exterior applications
Color options limited by the photopolymer process
Braille and character height dependent on resin consistency

For interior-only projects with standard color requirements, photopolymer is a known quantity. For exterior applications, high-durability environments, or any project that calls for a lifetime warranty, compression molded acrylic is the specification.

Feel the difference — request a sample Back to Why Compression Molded