CAB-O-SIL® HS-5 is a high surface fumed silica which imparts significant increase in viscosity in liquid systems and in reinforcement of sealants and rubbers.

All untreated fumed silicas are characterized by:

  • High purity
  • Aggregated structure
  • Submicron particle size
  • Low bulk density
  • Hydrophilic surface

Application Information:

Rheology Control for Coatings, Adhesive and other Liquid Systems:

CAB-O-SIL HS-5 can be used to provide thickening, thixotrophic (shear-thinning), and anti-settling behavior in liquid systems. High shear dispersion equipment is required to realize the full benefits of HS-5. For clear coatings and other systems, very well dispersed HS-5 provides good transparency.

CAB-O-SIL HS-5 is most efficient in non-polar to medium polar systems. For more polar systems, treated fumed silicas are more efficient.

Reinforcement of Silicone and Organic Rubber:

CAB-O-SIL HS-5 can be used for reinforcement of silicone rubber and can be used to reinforce organic rubbers. It imparts good increase in hardness, tensile and elongation.