Mould 8036 Square slumper (11.5 x 11.5 x 1cm)
Mould 8035 Square slumper (21 x 21 x 1.5cm)

Square slumper Mould 8035 (20cm x 20.1cm x 1.8cm)

Mould 8134 Spherical bowl (28cm diameter x 7cm)

Spherical Bowl Mould 8134 (28cm diameter x 7cm)

Square Slumper Mould 8036 (11cm x 11cm x 1.5cm)

£17.90 £14.92
More than 10 in stock
Square Slumper Mould.  

Create the perfect dish for little trinkets or perhaps a soap dish with this small mould. 

It has a small base which provides stability while giving the look of an even curve.

Inner Dimensions: Length: 11 cm, Width: 11 cm, Height: 1.5 cm 
Outer Dimensions: Length: 11.5 cm, Width: 11.5 cm, Height: 2.1 cm 

Bullseye Code: 8636

Please note that all our moulds are hand-made and therefore the dimensions may vary slightly from those shown. Mould manufacturers allow a tolerance of up to 2cm. We strongly recommend cutting the glass to the size measured from the actual mould rather than relying solely on the dimensions shown.

Will this mould fit in my kiln?

For a slightly larger square slumper, try mould 8296.



Firing Schedule:

Please Read: This firing recommendation has been calculated using Bullseye Glass with a thickness of 6 mm in a Paragon GL24 kiln, and is courtesy of Bullseye Glass Co. 

Segment Rate (C/hr) Temp. Hold
1 167C 638C :05
2 999 482C 1:00
3 56C 371C :00


  • Small kilns may require the process temperature reducing. In the Hobbyfuser and HotStart Pro, reduce the top temperature from 638C to 615C. In the Firebox 14, reduce the top temperature from 638C to 595C. All kilns vary, as does glass viscosity. Testing is necessary.

  • Remove the shelf when slumping in small kilns.

  • Side firing kilns may require more time in the first ramp than top firing kilns.

  • Bubbles in slumping are caused by firing too high or holding too long at process temperature.

  • Cracked moulds or cracked glass is caused by firing too fast in the first ramp or cooling too fast.

  • Devitrification on the outside of a slumped piece is caused by firing too high or holding too long at process temperature.

All our moulds are designed for multiple use and with care should last for many firings.

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