Kyodeiriabeiri

Clear Overglaze — Food-Safe Finish

A kiln-fired ceramic mug with a smooth clear overglaze finish on a wooden workshop shelf
The clear overglaze is the step most beginners skip and then regret — I know because I skipped it too, right up until I tried to use a glazed mug I had made and realised the surface was not sealed for contact with liquids. A transparent cone 6 overglaze is the layer that takes a decorative piece and makes it genuinely functional.
Price
$ 32.00 per 500 ml bottle
Delivery
Dispatched within two business days after payment is confirmed
Our responsibility
The bottle arrives sealed and at the stated 500 ml volume, correctly labelled as food-safe at cone 6, with no leakage or contamination present
How we review
Within 14 days of delivery we check the order together and resolve any condition or accuracy issue found at no extra cost

Clear overglaze has been the final layer in functional pottery since the first Chinese potters discovered that a thin coating of silica-rich slip, fired to the right temperature, produced a surface that water could not penetrate. The principle has not changed in a thousand years — only the formulation has been refined. For a contemporary amateur potter, a reliable clear overglaze is the difference between a shelf decoration and a piece that can be washed, filled, and used every day.

What you receive with this product

Each order contains one sealed 500 ml bottle of transparent cone 6 overglaze, formulated to fire to a smooth, food-safe surface on stoneware clay bodies. The glaze fires clear with a slight satin finish and is compatible with the oxide glazes available in the Kyodeiriabeiri shop. A product information card is included with recommended application thickness, brushing instructions, and a note on the number of coats required to achieve a fully sealed surface. The glaze is suitable for electric kiln firing.
  • One sealed 500 ml bottle of transparent cone 6 overglaze, food-safe at full maturity when correctly applied
  • Product card with recommended coat thickness, brushing method, and electric kiln firing guidance
  • Compatible with Kyodeiriabeiri oxide glazes and standard mid-fire stoneware clay bodies

Application and firing guidance

Apply the clear overglaze over a fully dried and bisque-fired piece, on top of any oxide glaze layer, using two to three even brush coats. Allow each coat to dry to the touch before applying the next. Fire to cone 6 according to the kiln manufacturer's recommended schedule. Under-firing this glaze — reaching a temperature below cone 6 maturity — will result in a surface that is not fully sealed and does not meet the food-safe standard described. Always verify kiln temperature with a witness cone before relying on the piece for food or liquid contact.

After hand-over and the defect window

The 30-day defect window covers the physical condition of the bottle on arrival: seal integrity, stated volume, and correct labelling. It does not cover variation in the fired surface result, which depends on kiln temperature, application thickness, and the underlying glaze layers — variables that the operator cannot observe or control. The food-safe designation applies when the glaze is fired to cone 6 maturity; under-fired pieces are outside the scope of the product guarantee.

Ask about this overglaze