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Experiment with layering or mixing different powder colours to get unique effects!

Freeze & Fuse is an amazing micro-casting technique, using Bullseye Glass Powders to create small and intricate castings. Use our exciting range of Freeze & Fuse moulds to create three-dimensional objects without complicated firing schedules, in any size kiln. Fused pieces can be used on their own or as components for larger projects. Watch our video guide or see our PDF instructions to get started!

Please note: Always wear a dust mask when using glass powders for your safety.

These moulds are made of flexible silicone and cannot be fired in a kiln.

TIP: Make sure you don’t leave your moulds in the freezer overnight, as this will dry the pieces out.


6 designs approx. 2-3.5cm.

Mould is 8.5cm x 7cm approximately.

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Customer Reviews

Based on 2 reviews
Good detail

Filled and froze and the shells popped out lovely. Kilned to 690 per instructions but they crumbled to powder when touched. Tried again to 695 per instructions on YouTube but still not solid. Trying again at 705.

Judith Hannington

A trickier mould than some of the flatter moulds to get your first thin layer of colour into, but so effective if you persevere.