Koi Casting Mold

The Koi Casting Mold from Creative Paradise casts koi fish shapes, each 5.5 inches long, in a single firing. The mold footprint is 8 inches by 5.5 inches, and the manufacturer lists about 33 grams of glass per cavity. The cast pieces work well as decorative focals, pendant or brooch blanks, and accents in fused glass panels or mosaic work.

Like all ceramic casting molds, this one is COE agnostic. Fill the cavities with frit, small billets, or stacked sheet scrap and fuse so the glass takes the koi fish form. As a kiln casting mold it is reusable across many firings when prepped and cared for properly.

What does the Koi Casting Mold make?
It casts koi fish shapes, each 5.5 inches long, in one firing. The pieces work well as decorative focals, pendant or brooch blanks, or accents for fused panels and mosaic projects.

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 koi?
Creative Paradise lists about 33 grams per cavity. Weigh your glass and test a first run when the result matters, since fill weight can vary with how fully you load the cavity.

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: 160996
• Manufacturer: Creative Paradise (CPI.LF146)
• Makes: koi fish shapes
• Finished piece size: 5.5 inches L each
• Mold size: 8 inches L x 5.5 inches W
• Suggested fill weight: about 33 grams per cavity
• 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 the 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, small 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.

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

Helpful downloads: Koi Pond Tutorial (PDF) · Fill Weights for Casting Molds (PDF) · Casting Mold Tips (PDF)

Description updated: July 6, 2026

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