Microsand™ Cement Additive
A high-purity crystalline silica ground to a uniform particle-size distribution of 5 microns that helps prevent compressive strength retrogression.
For more specifications:
http://www.halliburton.com/en-US/ps/cementing/materials-chemicals-additives/agents/strength-retrogression/default.page?node-id=hfqelahh
