4" Square Tile Kiln Casting Mold

The 4 inch Square Tile Kiln Casting Mold from Creative Paradise casts one square glass tile per firing, with the finished glass measuring 4 inches square at the cavity base. The mold itself measures 5.5 inches long by 5.5 inches wide by 1.5 inches tall, with a 7.75 inch diagonal, and the cavity casts a 4 inch by 4 inch tile. The tapered walls make it easy to load frit or glass chunks evenly before firing.

The square tile format suits kitchen backsplash accents, bathroom tile inserts, decorative wall panels, and mosaic focal pieces. Like all ceramic casting molds, this one is COE agnostic, so you can fill it with frit, billets, or stacked sheet scrap in any compatible COE and cast the glass to the tile shape. The mold is reusable across many firings when primed and cared for properly.

What does the 4 inch Square Tile mold make?
It casts one square glass tile per firing, measuring 4 inches at the base. The tile is thick enough to work as a decorative backsplash accent, bathroom tile insert, or mosaic focal piece.

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 do I prep the mold before casting?
Coat the cavity with a boron nitride spray or kiln wash and let it dry completely before adding glass. Re coat as needed between firings.

What temperature should I cast at?
Creative Paradise publishes a suggested full fuse schedule for a double layer of COE96 glass that tops out at 1460 F with a 10 minute hold, annealing at 950 F for COE96 or 900 F for COE90. Every kiln runs a little differently, so watch your first firing and adjust from there.

Specifications

• SKU: 4215
• Manufacturer: Creative Paradise
• Makes: 1 square tile per firing
• Finished piece size: 4 inches square (at base)
• Mold size: 5.5 inches L x 5.5 inches W x 1.5 inches T
• Diagonal: 7.75 inches
• 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 cavity 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.
• Fill with frit, billets, or stacked sheet scrap. The tapered cavity opening makes it straightforward to distribute glass evenly across the base before firing.
• Creative Paradise's suggested full fuse schedule for a double layer of COE96 glass ramps to a top temperature of 1460 F with a 10 minute hold, then anneals at 950 F (adjust to 900 F for COE90).
• The mold is COE agnostic. Match your firing schedule to the glass you are using, and adjust the anneal soak for your COE.
• Let the kiln cool fully before removing the cast tile. Re coat the mold with primer as needed between firings.

Description updated: July 6, 2026

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