Other Supplies
From Creative Insight Pottery
In stock online$7.25
CAD, plus 13% HST at cart
Online option: 1KG
Online direct shipping.
This page does not promise that the item is stocked at the Waterdown studio or available for pickup.
A substitute for mined-out Gerstley borate, a naturally occurring source of boric oxide, promoting early fusion. It is a blend of the same minerals proportioned to preserve the chemistry and working properties of Gerstley Borate. Use it as a 1:1 substitute. Testing first to compare fired results is recommended; some glazes may need minor adjustments.
For more information on Gillespie Borate borate, see the Digitalfire.com Reference Library of ceramic materials.
Yes. The default online option for GILLESPIE BORATE 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, 5:06 p.m..