https://www.onestopfire.shop/product-page/dixon-therm-a-glaze-bead-25-x-4mm-2-1m
Dixon Therm-A-Glaze Bead 25 x 4mm - 2.1m | OneStopFire.Shop
When combined with suitable fire-resistant glass, Therm-A-Bead is a fire-resistant glazing seal that provides reliable 60-minute fire resistance to a wooden...
a glaze