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Square Slumper with Flat Base Mould 8298 (8.3cm x 8cm x 1cm)

Price £10.05 Inc VAT (£8.38 Ex VAT)

4.7 out of 5 stars (3 Customer Reviews)
 Go Back to Square Moulds 

All prices include VAT.

Stock Status: More than 10 in stock
We Also Recommend for Square Slumper with Flat Base Mould 8298 (8.3cm x 8cm x 1cm):
Product Information
Mould 8298 - Square slumper with flat base.

Make a great little soap dish or tealight holder with this fabulous mould.  It has a well defined base ensuring the piece will not tilt.  

Inner Dimensions: Length: 8.3 cm, Width: 8 cm, Height: 1 cm 
Outer Dimensions: Length: 8.6 cm, Width: 8.8 cm, Height: 2.3 cm 

Fits in all the kilns we sell.

Please note that all our moulds are hand-made and therefore the dimensions may vary slightly from those shown. 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 bigger square slumper, try mould 8036.


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 649C :05
2 999 482C 1:00
3 56C 371C :00
4 999 21C :00


  • Small kilns may require the process temperature reducing. In the Hobbyfuser and HotStart Pro, reduce the top temperature from 649C to 626C. In the Firebox 14, reduce the top temperature from 649C to 606C. 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.

Product Reviews
4.7 out of 5 stars
5 out of 5 stars Monday 31 August, 2015 By Sarah Walsh - See all my reviews
Wonderful little mould. Perfect for using with the pre cut 10cm Tekta squares. Always using this mould, may purchase a 2nd so I can fire more at once.
4 out of 5 stars Saturday 29 March, 2014 By Kathy Mather - See all my reviews
Love it, handy for pre-slumps for deeper moulds and for using it on it's own to create nice, sleek pieces.

Pretty robust, been in the kiln practically every day for a month and only re-primed it once a week. The shallow shape means very little of the kiln wash is pulled off during the slump.
5 out of 5 stars Sunday 14 July, 2013 By Elizabeth Davison - See all my reviews
This is a great little mould - ideal for first timers and goes on being being useful for more advanced fusers. Easy to slump, great for using up scrap glass and makes attractive little dishes which sell well. My two have been through the kiln, scraped and kiln washed numerous times and comes good every time.

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