Patty Gray 8" Square Dam Kiln Casting Mold

The Patty Gray 8 Inch Square Dam from Creative Paradise is a ceramic kiln casting dam that holds glass in a square 8 inch by 8 inch frame, producing one flat cast slab per firing. The dam stands 1.25 inches tall with an interior casting area 0.5 inches deep, giving enough room to stack multiple layers of fusible glass inside the contained area. At a suggested fill of 695 grams, this dam suits projects that call for a substantial cast piece rather than a thin fused sheet.

The overall mold measures 8.75 by 8.75 inches with a diagonal of 12.25 inches. Creative Paradise notes that pieces release cleanly from the dam without requiring coldworking. Like all ceramic casting molds, it is COE agnostic and reusable across many firings when primed and maintained properly.

What does the Patty Gray 8 Inch Square Dam make?
It casts one flat 8 by 8 inch square glass piece per firing. Stack multiple layers of fusible glass inside the dam frame and the glass melts and consolidates into a thick, flat slab suited to panel work, decorative tiles, or blanks for cutting.

What COE glass can I use in this dam?
Any COE. Ceramic casting molds are COE agnostic, so the same dam works with COE96, COE90, or other compatible fusible glass. Match your firing schedule and anneal temperature to the glass you are using.

How much glass do I load into the dam?
Creative Paradise lists a fill weight of 695 grams. Load glass in multiple layers within the dam walls. Weigh your glass before loading and test a first run when the result matters, since fill depth affects finished piece thickness.

How do I prep the dam before firing?
Coat the interior dam walls and the kiln shelf surface inside the dam with a kiln shelf primer such as a boron nitride spray or kiln wash, and let it dry completely before loading glass. This prevents molten glass from bonding to the dam or the shelf.

Specifications

• SKU: 154595
• Manufacturer: Creative Paradise (CPI.GM141)
• Makes: 1 square cast glass piece
• Finished piece size: approximately 8 inches square
• Mold size: 8.75 inches L x 8.75 inches W x 1.25 inches T
• Inner dimensions: 8 inches L x 8 inches W x 0.5 inches deep
• Diagonal: 12.25 inches
• Suggested fill weight: 695 grams
• Material: ceramic kiln casting dam, 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 casting schedule suited to your glass and kiln.

• Prime the interior dam walls and the kiln shelf surface inside the dam with a boron nitride mold primer such as ZYP Boron Nitride Mold Primer, or kiln wash, and let it dry completely before loading glass so the glass does not bond to the dam or shelf.
• Load glass in multiple layers within the dam frame. The suggested total fill is 695 grams.
• Creative Paradise notes that pieces release cleanly from the dam without requiring coldworking when the dam is properly primed.
• The mold is COE agnostic. Use a firing schedule matched to your glass and adjust the final anneal soak for your COE.
• Let the kiln cool fully before removing the cast piece. Re coat the dam 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.

Multiple Layers (COE96):

*Segment 4 is the anneal soak at 950 F for COE96. If using COE90, adjust this temperature to 900 F.

Helpful downloads: Patty Gray Instructions (PDF) · Fill Weights for Casting Molds (PDF) · Casting Mold Tips (PDF)

Description updated: July 6, 2026

Spot an error or have feedback on this description? Report it here.