Other Supplies
From Creative Insight Pottery
In stock online$12.25
CAD, plus 13% HST at cart
Online option: 500g
Online direct shipping.
This page does not promise that the item is stocked at the Waterdown studio or available for pickup.
ZrSiO4. Zirconium silicate. Zircon. A purified, micronized glaze opacifier. 10%-15% Ultrox Extra added to most clear glazes produces a good white. Add to coloured glazes to make opaque pastels. It can be used in recipes calling for Zircopax, Superpax, etc. (alternate brands and grades differ somewhat in effective opacifying power depending on how finely ground they are; Ultrox Extra is a slightly more effective opacifier than Ultrox 500W).
For more information on Ultrox, see the Digitalfire.com Reference Library of ceramic materials.
Yes. The default online option for ULTROX EXTRA (ZIRCON) was in stock when this live product page was generated. Availability is checked again when it is added to the cart.
No. Supply prices are shown before tax. The applicable 13% HST is added by the cart and shown before payment.
This online listing does not promise studio inventory or pickup. Pottery supply orders are sold for direct shipping to customers.
The current storefront sells the default option shown on this page. Other supplier options are not advertised until the storefront can support selecting them through cart and checkout.
Product price and default-option availability verified from the live supply source at Aug 26, 2026, 5:16 p.m..