Microfume 104 OG is a semi-densified, constant pH, amorphous light grey powder that improves compressive strengths and durability (via permeability decrease). It “flows” better than its fully densified counterparts and has a high Pozzolanic Activity Index (PAI). MicroFume 104 OG should be used as an extender for lightweight cements and can be used in conjunction with or instead of conventional pozz.