Round Coaster Slumping Mold

The Round Coaster slumping mold from Creative Paradise slumps one round glass coaster per firing. The inner cavity measures 3.5 inches in diameter and 0.25 inches deep, sized to fit a standard drink glass base and protect furniture surfaces. The mold body is 6.5 inches in diameter and 1 inch tall.

To use this mold, lay a pre-cut or pre-fused glass circle over the primed cavity and fire to slumping temperature. The softened glass settles by gravity into the shallow round well, forming a coaster with a slight recess that cradles a drink glass base. Like all ceramic molds, this one is COE agnostic and reusable across many firings when prepped and cared for properly.

What does the Round Coaster slumping mold make?
It slumps one round glass coaster per firing. The inner cavity is 3.5 inches in diameter and 0.25 inches deep, producing a shallow-dish coaster sized to hold a standard drink glass base.

What size glass blank do I need?
Prepare a glass circle sized to fit the 3.5 inch inner diameter of the cavity. A pre-fused blank or a clean-cut sheet circle both work. Test your blank size in a first run and trim as needed for a clean result.

What COE glass can I use in this mold?
Any COE. Ceramic slumping 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 slumping?
Coat the cavity 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 placing your glass. Re-coat as needed between firings.

Specifications

• SKU: 156931
• Manufacturer: Creative Paradise (CPI.GM64)
• Makes: 1 round coaster
• Inner cavity: 3.5 inches diameter x 0.25 inches deep
• Mold size: 6.5 inches diameter x 1 inch tall
• Material: ceramic slumping 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 slumping 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, and let it dry completely before placing your glass so the glass does not stick.
• Place a pre-cut or pre-fused glass circle over the cavity. Size your blank to fit the 3.5 inch inner diameter and test a first run to confirm the fit and slump depth.
• The mold is COE agnostic. Use a slump schedule matched to your glass, adjusting the final anneal soak for your COE.
• Let the kiln cool fully before removing the coaster. 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.

Slump (COE96):

*Segment 3 is the anneal soak at 950 F for COE96. If using COE90, adjust this temperature to 900 F.

Description updated: July 6, 2026

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