Other Supplies
From Creative Insight Pottery
In stock online$12.67
CAD, plus 13% HST at cart
Online option: 100g
Online direct shipping.
This page does not promise that the item is stocked at the Waterdown studio or available for pickup.
CMC gum is a water soluble long-chain molecule derived from cellulose. A small amount (typically 0.5% -2%) is included in brushing-type glaze recipes to extend brushing time by thwarting rapid water absorption into the clay. CMC creates a very strong application bond and it provides an excellent, tough surface to paint on.
It can be added to all types of glaze but be cautious about adding it to dipping glazes. CMC is a mild deflocculant which can cause settling. It also allows more glaze to drain off resulting in a thinner applied layer.
It can be mixed thoroughly and quickly in a blender. If hand mixed, add CMC to water and let it stand overnight before mixing. CMC is organic and will degrade without an added preservative, sometimes within weeks.
For more information on CMC gum, see the Digitalfire.com Reference Library of ceramic materials.
Yes. The default online option for GUM CMC (7L2) 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..