Starfish and Seahorse Frit Casting Mold

The Starfish and Seahorse Frit Casting Mold from Creative Paradise casts four pieces in a single firing: a large seahorse, a small seahorse, a thick starfish, and a thin starfish. The large seahorse measures 3.75 inches long by 1.75 inches wide, the small seahorse measures 2.75 inches long by 1.5 inches wide, the thick starfish measures 3.25 inches in diameter, and the thin starfish measures 3.5 inches in diameter. All four cavities share a mold footprint of 9 inches long by 8 inches wide by 1.5 inches tall.

Fill weights vary by cavity: the large seahorse takes about 44 grams of glass, the small seahorse about 27 grams, the thick starfish about 47 grams, and the thin starfish about 51 grams. Like all ceramic casting molds, this one is COE agnostic, so you can use it with COE96, COE90, or other fusible glass. Load each cavity with frit, small billets, or stacked sheet scrap and fuse to shape. The mold is reusable across many firings when prepped and cared for properly.

What does the Starfish and Seahorse mold make?
It casts four pieces in one firing: a large seahorse (3.75 inches by 1.75 inches), a small seahorse (2.75 inches by 1.5 inches), a thick starfish (3.25 inch diameter), and a thin starfish (3.5 inch diameter). They are well suited to pendants, decorative tiles, and wall art accents.

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 44 grams for the large seahorse, 27 grams for the small seahorse, 47 grams for the thick starfish, and 51 grams for the thin starfish. Weigh your glass and test a first run when the result matters.

How do I prep the mold before casting?
Coat all 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: 161827
• Manufacturer: Creative Paradise (CPI.LF149)
• Makes: 4 pieces: large seahorse, small seahorse, thick starfish, thin starfish
• Finished piece sizes: Large Seahorse 3.75 inches L x 1.75 inches W; Small Seahorse 2.75 inches L x 1.5 inches W; Thick Starfish 3.25 inches dia.; Thin Starfish 3.5 inches dia.
• Mold size: 9 inches L x 8 inches W x 1.5 inches T
• Suggested fill weight: Large Seahorse 44g, Small Seahorse 27g, Thick Starfish 47g, Thin Starfish 51g
• 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 all 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 each cavity 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: Seashore Tray Tutorial (PDF) · Fill Weights for Casting Molds (PDF) · Casting Mold Tips (PDF)

Description updated: July 6, 2026

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