... detailed information for thermal insulation bricks is: 1. diatomaceous brick density from 0.6g/cm3 to .8g/cm32. clay insulation brick density ... 23, JM 26, JM 28 & JM305. Other thermal insulation bricks made of silica, mullite and alumina powder.Common size ... sizes can also be offered according to clients requirement.Our thermal insulation bricks are well exported to Korea, Japan, Pakistan, Turkey, ...