Kiln viewport plug
"I've only had my kiln for a few months, didn't think about the viewpirt when I bought it. If I hope to be working while it's running, I have to be careful not to look directly at it because the light is blinding. And there is heat loss though it - minimal, but when sitting by it... This viewport plug is simply a piece of firing blanket - I could have made my own, but that didn't occur to me! But it works beautifully. Fits the viewport perfectly, no more blinding light, no more heat loss."
