Detailed Product Description The detailed information for thermal insulation bricks is: 1. diatomaceous brick density from 0.6g/ ... bricks like JM 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, ...