Thick clear cast acrylic in 30, 40 and 50 mm, sold as full 2440 x 1220 mm sheets or cut, machined and polished to size in our Sydney workshop. Used for pool windows, aquarium panels, awards, furniture and display. Larger sheets up to 8300 x 3100 mm and 100 mm thick made to order.
Clear Cast Acrylic Block
Price range: $1,584.00 through $2,541.00
Description
Clear acrylic block is thick cast acrylic, the glass-clear material behind pool windows, aquarium viewing panels, premium awards and solid acrylic furniture. We stock 30, 40 and 50 mm sheets at our Moorebank workshop in Sydney, and we can cut, machine and polish them to your size, from a single award blank to a pool wall panel.
Why cast acrylic block
Thick acrylic is made two ways, and for block it matters. Cast acrylic is poured and set between plates, so it has less internal stress than extruded sheet. That means it machines and polishes cleanly, is less likely to craze when bonded, and engraves to a crisp frosted white. All our block is cast.
- 92% light transmission, clearer than glass at the same thickness
- Stays clear through the edge, with none of the green tint thick glass has
- Less than half the weight of glass
- Much tougher than glass and won’t shatter into shards
- Weathers well outdoors without yellowing
- Fine scratches can be polished out
Stocked sheets
Buy online in 30, 40 and 50 mm, full 2440 x 1220 mm sheets, supplied with protective film on both faces. For 25 mm and thinner, see our clear acrylic sheet.
Large sheets made to order, up to 100 mm thick
Pool walls and large aquarium panels need bigger sheets than we keep in stock. We can supply:
| Sheet size | Thickness |
|---|---|
| 3000 x 2000 mm | 30 to 70 mm |
| 5000 x 2000 mm | 30 to 70 mm |
| 6000 x 3100 mm | 30 to 70 mm |
| 8300 x 3100 mm | 30 to 70 mm |
Block up to 100 mm thick is also available. These are quoted to order: send us your sizes.
Cut, machined and polished in Sydney
Most thick acrylic jobs need more than a full sheet. Our workshop does the work in house:
- Cut to size, from small blanks to full panels
- CNC routing for shapes, curves, holes and recesses
- Diamond polished edges for a clear, glass-like finish
- Annealing after machining to relieve stress, for parts that will be bonded or under load
Send us a drawing or just the sizes and we’ll quote it.
Small panels and offcuts
Don’t need a full sheet? We often have block offcuts, and we can cut small panels for pool wall windows, viewing ports, aquarium fronts and trophies. Ask us what we have in your thickness.
Pool windows and aquarium panels
Acrylic is the standard material for pool windows, wet edges and aquarium viewing panels because it stays clear at thickness, weighs less than half as much as glass and can be cut and polished to fit.
The right thickness depends on water depth, panel size and how the panel is supported on its edges, so it needs to be set by your pool builder or engineer. Once you have the spec, we’ll supply and cut the acrylic to it. To quote, send us:
- Panel sizes, or a drawing
- The thickness your engineer has specified
- Edge finish: saw cut, or polished on visible edges
- Delivery suburb, and the date you need it
Awards, trophies and engraving
Cast acrylic block is the material for weighty, high-end awards. It laser engraves to a clean frosted white and polishes to a crystal edge. We cut and polish blanks to your size, as one-offs or a run of the same size, ready for engraving.
Furniture and display
Solid clear acrylic makes tabletops, shelves, plinths, bookends and display risers that look like they’re floating. We cut, CNC and polish to your design.
Weight guide
Acrylic weighs about 1.19 kg per square metre for every millimetre of thickness.
| Thickness | Weight per m² | 2440 x 1220 sheet |
|---|---|---|
| 30 mm | 36 kg | 107 kg |
| 40 mm | 48 kg | 142 kg |
| 50 mm | 60 kg | 178 kg |
| 60 mm | 72 kg | 213 kg |
| 70 mm | 84 kg | 248 kg |
| 100 mm | 119 kg | 355 kg |
Looking after acrylic
Clean with mild soapy water and a soft microfibre cloth. Avoid glass cleaners with ammonia or solvents, which can cloud or craze the surface. Fine scratches can be polished out, and we can repolish panels in our workshop.
Common questions
How thick does acrylic need to be for a pool window or aquarium?
It depends on the water depth, the panel size and how the panel is held on its edges. It should be specified by your pool builder or engineer. We supply and cut to that spec.
Is acrylic or glass better for a pool window?
Acrylic stays clear at large thicknesses, where glass turns green. It’s less than half the weight, much tougher, and it can be cut, shaped and polished. Acrylic does scratch more easily than glass, but light scratches can be polished out.
Does pool chlorine or salt water affect acrylic?
Acrylic handles normal pool and salt water conditions well. Keep chemicals within normal levels and clean with mild soapy water.
Will clear acrylic block go yellow outside?
Cast acrylic naturally resists UV and weathers well outdoors without yellowing.
Can you cut a full sheet down for me?
Yes. We cut to any size, with saw cut or diamond polished edges, and we can CNC shapes and holes.
Can I buy a small piece or an offcut?
Yes. Ask us for the thickness and size you need and we’ll check our offcuts.
What’s the difference between cast and extruded acrylic?
Cast acrylic has less internal stress, so it machines, polishes, bonds and engraves better. Thick block is always cast.
Can acrylic block be laser engraved?
Yes. Cast acrylic engraves to a crisp frosted white, which is why it’s used for premium awards.
Is the thickness exact?
Cast sheet thickness can vary slightly across a sheet. If an exact thickness matters for your job, tell us and we’ll check the sheet before we cut.
How is it delivered?
Full sheets are heavy, so they go on a pallet by truck. You can also pick up from our Moorebank workshop. Let us know the date you need it when you order.
Acrylic can be recycled back to its original monomer. Read about recycling acrylic.
Additional information
| Weight | N/A |
|---|---|
| Dimensions | N/A |
| Thickness | 20mm, 25mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm |
| Surface Finish | Double-sided gloss finish |
| Colour | Clear |
| Size | 2440mm x 1220mm, 3000mm x 2000mm, 3050mm x 2030mm, 5000mm x 2000mm, 6000mm x 3100mm, 8300mm x 3100mm |
