Bara 200N Baryum sulfate Cimbar Extenders / Fillers >> Barium Sulfates SEALANT Bara - products are our least expensive barytes fillers. They are made from lower brightness/lower density ores. They are only available as 200 mesh & 325 mesh products. Applications include brake pads, sound deadening, urethane & pvc foams, sealants, rubber compounds, etc This group of naturally occurring products is unbleached and ground in a unique combination of medium and fine grind particle sizes providing high specific gravity, low solubility, and chemical inertness. Barium sulfate. Used as filler in sealants. Provides high specific gravity, low solubility, and chemical inertness. Chemical analysis: BaSO4: 90%. SiO2: 6.0%. SrSO4: 0.4%. Fe2O3: 0.2%. MgO: 0.05%. CaO3: 0.2%. Al2O3: 0.3%.