Large S Curve Slumping Mold

The Large S Curve Slumping Mold from Creative Paradise drapes a sheet of glass into a flowing S curve profile in a single firing. The mold measures 13.25 inches by 7.25 inches, with a 15.25 inch diagonal, making it large enough to slump a substantial glass panel. The double-curve form suits decorative wall pieces, sculptural panels, and architectural accent work.

Like all ceramic slumping molds, this one is COE agnostic. Lay a precut glass blank or a fused panel onto the prepared mold and fire to a slump schedule matched to your glass. Gravity does the shaping as the glass softens and settles over the form, producing a clean S curve with a flat back where the glass rests on the mold.

What does the Large S Curve Slumping Mold make?
It slumps a glass sheet into a gentle S curve profile in one firing. The finished piece can serve as a decorative wall panel, a sculptural accent, or an architectural element.

What COE glass can I use with this mold?
Any COE. Ceramic slumping molds are COE agnostic, so the same mold works with COE96, COE90, or other fusible glass. Match the slump schedule and anneal soak to the specific glass you are using.

What size glass blank do I need?
Cut or prepare a glass blank sized to cover the mold. The mold footprint is 13.25 inches by 7.25 inches, with a 15.25 inch diagonal to use as a reference when laying out your piece. Test a first run when the result matters, since blank sizing affects how the glass drapes over the form.

How do I prep the mold before slumping?
Coat the mold surface with a kiln mold primer such as a boron nitride spray or a kiln wash such as Hotline Primo Primer, and let it dry completely before setting the glass on the mold. Re-coat as needed between firings to prevent sticking.

Specifications

• SKU: 161205
• Manufacturer: Creative Paradise (CPI.GM191)
• Makes: 1 S curve glass panel per firing
• Mold size: 13.25 inches L x 7.25 inches W
• Diagonal: 15.25 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 slump 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, and let it dry completely before setting the glass on the mold so the glass does not stick.
• Cut your glass blank to cover the mold footprint. A single sheet of compatible glass or a pre-fused panel both work; size it to drape naturally over the S curve form.
• 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.

Helpful downloads: Sail Boat Textured Slumping Tutorial with Large S Curve (PDF)

Description updated: July 6, 2026

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