Flat Top Mushroom Cap Slumping Mold

The Flat Top Mushroom Cap Slumping Mold from Creative Paradise shapes a pre-made glass blank into a flat-topped cap form in a single firing. The mold form measures 6.75 inches in diameter and stands 2.5 inches tall. A sheet of fusible glass is draped over the form and heated in the kiln until gravity pulls it down to follow the contour, producing a finished piece with a flat crown and gently curved sides in the mushroom cap profile.

Like all ceramic kiln molds, this one is COE agnostic, so the same form works with COE96, COE90, or other compatible fusible glass. Coat the form with a kiln wash or boron nitride primer before use and allow it to dry fully before placing glass. Creative Paradise provides a suggested drape schedule for a double layer of COE96 glass as a starting point for dialing in your own kiln.

What does the Flat Top Mushroom Cap Slumping Mold make?
It shapes glass into a flat-topped cap form, roughly 6.75 inches across, with curved sides following the mushroom cap contour. The finished piece has a flat crown and a gently curved edge profile.

What size glass blank do I need?
The mold form is 6.75 inches in diameter. Cut your blank somewhat larger than the mold to allow for movement as the glass drapes down the sides. A first test run will help you find the right blank size for your glass and desired drape depth.

What COE glass works with this mold?
Any COE. Ceramic slumping molds are COE agnostic, so COE96, COE90, or other compatible fusible glass all work. Match your firing schedule to the glass you are using.

How do I prep the mold before slumping?
Coat the form with a boron nitride mold primer or a kiln wash such as Hotline Primo Primer and let it dry completely before placing glass so the finished piece releases cleanly. Re-coat as needed between firings.

Specifications

• SKU: 162473
• Manufacturer: Creative Paradise (CPI.GM207)
• Makes: flat top mushroom cap shape
• Mold size: 6.75 inches diameter x 2.5 inches 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 drape schedule suited to your glass and kiln.

• Prime the form with a boron nitride mold primer such as ZYP Boron Nitride Mold Primer, or a kiln wash, and let it dry completely before placing glass so the glass does not stick.
• Place a pre-fused glass blank over the top of the form. The suggested firing schedule is based on a double layer of COE96 glass. Adjust blank size and thickness to suit your design.
• The mold is COE agnostic. Use a drape schedule matched to your glass, adjusting the final anneal soak for your COE.
• Let the kiln cool fully before removing the draped piece. 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.

Drape (COE96, double layer):

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

Helpful downloads: Warped Grid Mushroom Cap Tutorial (PDF)

Description updated: July 6, 2026

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