The Patty Gray 8 inch Round Dam mold from Creative Paradise casts a single large round glass disc in one firing. The inner cavity measures 8.5 inches in diameter and 0.75 inches deep, yielding a finished round piece of about 8.5 inches across. The outer dam body is 9 inches in diameter and 1 inch tall, giving it enough height to contain multiple stacked layers of glass as they fuse and consolidate.
The dam sits on a primed kiln shelf and is loaded with glass, then fired so the layers melt and flow into a solid round disc. Creative Paradise lists a fill weight of about 580 grams, which accommodates multiple layers of sheet glass, billets, or frit. Like all ceramic casting molds, this one is COE agnostic and reusable across many firings when prepped and cared for properly.
What does the Patty Gray 8 inch Round Dam mold make?
It casts a single round glass disc roughly 8.5 inches in diameter in one firing. The large format suits decorative wall pieces, platters, and fused centerpieces.
How does a round dam mold work?
The ceramic dam ring sits on a primed kiln shelf and contains the glass as it melts and flows. Load the cavity with multiple layers of sheet glass, billets, or frit, then fire to a full fuse so the layers melt into one solid disc.
How much glass do I need?
Creative Paradise lists about 580 grams. That fill weight accommodates multiple layers of sheet glass stacked inside the dam. Weigh your glass and test a first run when the result matters.
What COE glass and prep does it need?
Any COE works, since the mold is COE agnostic. Prime the kiln shelf surface and the interior walls of the dam with a boron nitride spray or kiln wash, and let it dry completely before loading glass.
Specifications
- SKU: 154596
- Manufacturer: Creative Paradise (CPI.GM131)
- Makes: 1 round disc casting
- Finished piece size: about 8.5 inches diameter
- Mold size: 9 inches diameter x 1 inch tall
- Inner dimensions: 8.5 inches diameter x 0.75 inches deep
- Suggested fill weight: about 580 grams
- Material: ceramic kiln casting mold (dam style), 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 kiln shelf surface and the interior walls of the dam 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 adding glass so the glass does not stick.
- Load the cavity with multiple layers of sheet glass, billets, or frit to reach the 580 gram fill weight. The 0.75 inch deep cavity accommodates several stacked layers of standard sheet glass.
- Creative Paradise notes that castings release clean with no need for coldworking when the dam is properly primed.
- The mold is COE agnostic. Use a full fuse schedule matched to your glass, adjusting the final anneal soak for your COE.
- Let the kiln cool fully before removing the cast disc. 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.
Full Fuse, Multiple Layers (COE96):
| Segment |
Rate |
Temp (F) |
Hold |
| 1 |
200 |
1000 |
15 |
| 2 |
300 |
1225 |
30 |
| 3 |
350 |
1470 |
15 |
| 4 |
9999 |
950* |
120 |
| 5 |
100 |
700 |
01 |
*Segment 4 is the anneal soak at 950 F for COE96. If using COE90, adjust this temperature to 900 F.
Helpful downloads: Patty Gray Mold Instructions (PDF) · Drop Center Bowl Tutorial (PDF) · Fill Weights for Casting Molds (PDF) · Casting Mold Tips (PDF)
Description updated: July 6, 2026
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