Acrylic sheet storage is a flat, shaded, supported business, and most damage happens there. A joinery in Hamburg received 40 sheets of 5 mm acrylic on a Friday, stood them on edge against a wall over the weekend, and by Monday 11 sheets had a permanent bow. The material was not defective. It had been asked to carry its own weight in the worst possible orientation for 60 hours.
Good acrylic sheet storage is boring and specific: flat, supported, shaded, and stacked within limits. Every point below comes from a claim we have seen.
Acrylic sheet storage: position, temperature and time
- Flat on a level pallet, full support, no gaps under the middle
- Indoors, 10 C to 30 C, out of direct sun and away from heaters
- Never on edge for more than 24 hours, never leaning unsupported
- Masking film off within 6 months at 25 C, sooner in sun or heat
Creep is the mechanism. Acrylic softens and deforms under sustained load long before it melts. A sheet standing on edge carries a bending load from its own weight, and warm air accelerates the movement. Two days is enough to leave a set that will not come out on the saw.
Temperature also drives the masking film. The adhesive on a protective film gains peel strength with time and heat. Leave a masked sheet in a container in the sun and the film can transfer adhesive to the panel; peel it cold and it takes chunks of surface with it. We ship with a film rated for the transit time and recommend de-masking within a week of arrival on site.
Handling, lifting and the strap that ruins a crate
Two people, gloves, and the sheet vertical is the safe carry. One person dragging a 2440 mm sheet across a floor will collect grit under the edge and leave a scratch that runs the length of the panel. Cotton or nitrile gloves also stop fingerprints etching into a freshly cleaned surface in humid weather.
Crates should be strapped over timber, never directly over the sheet stack. A steel strap tensioned to hold the crate will put a line load on the top sheet, and in summer that line becomes a visible groove. Our export crates use foam-capped bearers and edge protectors for exactly this reason, detailed in the export packing and shipping guide.
On site, keep the crate closed until the area is ready. A sheet stored in a dusty room with the film removed is a sheet that will be cleaned repeatedly before installation, and every wipe adds a chance of a scratch.
Finally, accept the claim rules. If a panel has been stored on edge, in sun, or with the film left on for a season, most suppliers will treat the resulting deformation as site handling rather than material fault. Photograph the crate and the pallet on arrival, before unpacking. It takes two minutes and settles arguments later.
For the thickness and stack limits of specific gauges, the standard sizes and thickness guide lists the sheet formats we produce and how they are packed.
Ask for our packing and storage sheet with your order at oversales@rpplexiglass.com, or request a crate spec for your site.
Frequently Asked Questions
How should acrylic sheets be stored?
Flat, on a level pallet, fully supported, indoors between 10 C and 30 C, away from direct sun and heat sources. Never lean a sheet against a wall for more than a day, and never store it on edge without a rack.
Can acrylic sheets be stacked?
Yes, up to a limit set by thickness. Thin 3 mm sheets should not carry more than about 10 sheets per stack; 10 mm and above can take 20 or more if the pallet is flat. Excess load leaves permanent pressure marks in the masking and can cold-flow the surface.
Why do sheets arrive with marks that will not polish out?
Pressure marks from stacking or from a strap tightened over the crate. They are indentations, not surface scratches. Prevention is a flat pallet and no point loads; once formed, they can only be removed by machining the surface.