Detailed Product Description The detailed information for thermal insulation bricks is: 1. diatomaceous brick density from 0. ... like JM 23, JM 26, JM 28 & JM305. Other thermal insulation bricks made of silica, mullite and alumina powder.Common ... offered according to clients requirement.Our thermal insulation bricks are well exported to Korea, Japan, Pakistan, Turkey, Poland, South Africa and etc.