Most buyers think thickness is a shelf size you pick from a list. For custom thickness cast acrylic sheet, the truth is the opposite: the sheet is cast to the gauge you need, from thin protective glazing up to 300 mm and beyond for structural panels. That is why ordering custom thickness is really about specifying the property, not choosing from a catalogue.
How a custom-thickness cast sheet is made
Cell cast acrylic is polymerised in a mould whose gap sets the final thickness. Because the gauge is set at casting, the sheet carries low internal stress and holds its dimension uniformly. That is different from extruded sheet, which is pushed through a die and drifts in thickness. For a custom-thickness panel that will carry load, you want the cast route.
What to include when you order custom thickness
- Exact thickness: state the nominal gauge you need; we confirm the tolerance we can hold.
- Sheet size: length and width, and whether you need an oversized single sheet or standard sizes.
- Grade: aquarium, structural, or general purpose — this changes the casting specification.
- Finish: clear, tinted, or with a specific surface treatment.
- Machining: whether you need edges dressed, drilled or cut to a drawing.
For the tolerance side of the question, our guide on acrylic sheet thickness tolerance explains what gauge drift means for a real project, and for large-format sheets see custom size acrylic sheets.
Frequently Asked Questions
Q: What thickness range can you cast?
A: We cast custom-thickness acrylic from thin panels up to 300 mm for structural use, and beyond on request for large load-bearing panels.
Q: Is a custom-thickness sheet stronger than a standard sheet?
A:Thickness is cast to your gauge, so the panel is designed for the load rather than being a standard sheet pressed into service; the strength comes from matching gauge to the application.
For a project-specific quotation on thick cast acrylic sheets, email oversales@rpplexiglass.com with your thickness, sheet size and quantity.