Square Sided Slumping Mold

The Square Sided Slumping Mold from Creative Paradise slumps a flat glass blank into a square dish with straight vertical sides. The finished shape measures 6.5 inches by 6.5 inches across and 1 inch deep, giving you a compact, cleanly sided bowl that works as a decorative dish, candle holder, or display piece. The mold footprint is 6.75 inches by 6.75 inches, with a diagonal of 9.5 inches, which is helpful when planning shelf space or sizing blanks.

This shape is a consistent choice across experience levels: it is accessible for those new to slumping because the square geometry is easy to cut for, and the straight sides produce a finished piece with a clean, defined profile. Like all ceramic slumping molds, this one is COE agnostic and reusable across many firings when prepped and cared for properly.

What does the Square Sided Slumping Mold make?
It slumps a flat glass blank into a square dish with straight sides, 6.5 inches across and 1 inch deep. The shape suits decorative dishes, small trays, candle holders, and display pieces.

What size glass blank do I need?
Cut or fuse a blank to approximately 6.5 inches by 6.5 inches to cover the mold opening. The 9.5 inch diagonal can guide your layout when cutting from a sheet.

What COE glass can I use?
Any COE. Ceramic slumping molds are COE agnostic, so the same mold works with COE96, COE90, or other fusible glass. Match your firing schedule to the glass you are using.

How do I prep the mold before slumping?
Coat the mold surface with a kiln wash or a boron nitride spray such as ZYP, and let it dry completely before placing your blank so the glass does not stick.

Specifications

• SKU: 166507
• Manufacturer: Creative Paradise (CPI.GM239)
• Makes: 1 slumped square dish per firing
• Finished piece size: 6.5 inches L x 6.5 inches W, 1 inch deep
• Mold size: 6.75 inches L x 6.75 inches W
• Diagonal: 9.5 inches
• Material: ceramic kiln slumping mold, reusable
• Glass: any COE (COE agnostic)

Working Notes

These are guidelines, not guarantees. Every kiln fires a little differently, so test a small run first when the result matters and follow a slumping schedule suited to your glass and kiln.

• Prime the mold surface with a boron nitride mold primer such as ZYP Boron Nitride Mold Primer, or a kiln wash such as Hotline Primo Primer, and let it dry completely before placing your blank so the glass does not stick.
• Place a pre-cut or pre-fused flat blank on top of the mold, sized to cover the opening. The blank will soften and drape down into the square form as the kiln heats.
• The mold is COE agnostic. Use a slump schedule matched to your glass, adjusting the final anneal soak for your COE.
• Let the kiln cool fully before removing the slumped piece. Re coat the mold with primer as needed between firings.
• The Slide Hi Temp brand separator is not recommended with these molds.

Creative Paradise Suggested Firing Schedule

This is a suggested COE96 starting schedule, not a guarantee. Every kiln fires differently. Test a small run and adjust the schedule for your glass and kiln.

Slump (COE96):

*Segment 2 is the anneal soak at 950 F for COE96. If using COE90, adjust this temperature to 900 F.

Description updated: July 6, 2026

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