$ 16.00 New Available online




Quantity Discounts:
Qty: Unit Price:
5 $9.90
10 $9.20
50 $7.60
250 $7.15

Must input 50 to get full bag

Priced Per Pound

Macaloid is the trade name for an extremely fine-grained clay derived from volcanic materials. Macaloid is geologically and chemically similar to bentonite, but there are notable differences -- in particular, Macaloid contains a higher percentage of magnesium.

When used in glazes, Macaloid is a suspension agent. Additionally, Macaloid can increase the drying rate of water suspended glazes, which means that it can simply help applied glazes to dry a bit faster. Because Macaloid is quite similar to bentonite, this means that you can use it like bentonite -- add it to glazes in a small amount (1-2% of dry weight) for increased suspension.

Like bentonite, Macaloid can also be used as an additive in claybodies for increased plasticity. The recommended amount is 2%, no more than 3%. In particular, macaloid is a good plasticizer for white claybodies such as porcelain, since it fires to a very crisp white. Keep in mind that increasing your macaloid content in a claybody does contribute to greater shrinkage.