Two Small Mushroom Cap Casting Mold

The Two Small Mushroom Cap mold from Creative Paradise casts two mushroom cap shapes in a single firing, one measuring 3.75 inches in diameter and one measuring 3 inches in diameter. The mold footprint is 9.75 inches by 5.5 inches, making it an efficient way to produce a pair of dome-shaped cabochons or decorative accents in one kiln run.

Like all ceramic casting molds, this one is COE agnostic. Fill the cavities with frit, billets, or stacked sheet scrap and fuse so the glass takes the rounded dome shape of each mushroom cap. Creative Paradise lists about 85 grams of glass for the large 3.75 inch cavity and 70 grams for the small 3 inch cavity. The mold is reusable across many firings when prepped and cared for properly.

What does the Two Small Mushroom Cap mold make?
It casts two mushroom cap shaped pieces in one firing: one at 3.75 inches in diameter and one at 3 inches in diameter. The finished pieces work well as decorative cabochons, sculptural accents, or mixed media components.

What COE glass can I use in this mold?
Any COE. Ceramic casting 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 much glass do I need per cavity?
Creative Paradise lists about 85 grams for the large 3.75 inch cavity and 70 grams for the small 3 inch cavity. Weigh your glass and test a first run when the result matters.

How do I prep the mold before casting?
Coat the cavities with a kiln shelf primer such as a boron nitride spray (for example ZYP) or a kiln wash such as Hotline Primo Primer, and let it dry completely before adding glass. Re coat as needed between firings.

Specifications

• SKU: 164276
• Manufacturer: Creative Paradise (CPI.LF169)
• Makes: 2 mushroom cap pieces (1 large, 1 small)
• Finished piece size: 3.75 inch diameter (large), 3 inch diameter (small)
• Mold size: 9.75 inches L x 5.5 inches W
• Suggested fill weight: Large: 85 grams, Small: 70 grams
• Material: ceramic kiln casting 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 casting schedule suited to your glass and kiln.

• Prime both cavities with a boron nitride mold primer such as ZYP Boron Nitride Mold Primer, or a kiln wash, and let it dry completely before adding glass so the glass does not stick.
• Fill with frit, billets, or stacked sheet scrap. For a tack fired surface, the manufacturer suggests powder and fine frit filled uniformly to about a quarter inch.
• 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 pieces. 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 (COE96):

Tack Fire (COE96): for a tack fired surface, fill uniformly to about a quarter inch with powder and fine frit.

*The 950 F hold marked with an asterisk is the anneal soak for COE96. If using COE90, adjust this temperature to 900 F.

Helpful downloads: Small Frit Cast Mushroom Tutorial (PDF) · Fill Weights for Casting Molds (PDF) · Casting Mold Tips (PDF)

Description updated: July 6, 2026

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