Rheology Modifiers, Thixotropes and Thickening Agents for Adhesives and Sealants
Manufacturers of adhesives, sealants and other engineered materials around the world have relied on our Qemetica HI-SIL® silica thickening agents, rheology modifiers and thixotropes to help address the complex formulation, manufacturing, application and performance challenges they face.

Available in four grades, Hi-Sil thickening agents cover a range of particle sizes and surface areas. Together, they offer manufacturers a selection of products to achieve desired rheology properties and anti-sag/suspension performance with minimal impact on other system properties.
Hi-Sil thickening agents provide enhanced performance and efficiency in non-polar and medium-polar solvent systems.
Rheology Modifiers and Thixotropes
Product | Particle Size* (µm) | DBP Oil Absorption (mL/100g) | pH | N2 (BET-5) Surface Area (m2/g) |
Applications / Benefits |
---|---|---|---|---|---|
Hi-Sil T-800 | 2.5 | 270 | 6.9 | 190 | Superior efficiency in sag control of plastisol-based systems, fast recovery at low shear, cost-effective. |
Hi-Sil T-152 | 4 | 265 | 6.9 | 130 | Highly efficient, low-cost, viscosity increase of industrial solvent-borne compositions. |
Hi-Sil T-700 | 4 | 275 | 6.9 | 190 | Highly efficient, low-cost, improved sag control for a wide variety of solvent-borne compositions. |
Hi-Sil T-600 | 5.5 | 230 | 6.9 | 150 | Highly efficient, low-cost, thixtotropic action for a wide variety of solvent-borne compositions. |
Hi-Sil is a registered trademark of Qemetica Industries Ohio, Inc.

Carrier and Free-Flow
Our precipitated silica products are used as free-flow and carrying agents for food, animal feed and agricultural and industrial applications enabling products and processes to flow better.

Rubber
Qemetica's precipitated silica products have been integral to the rubber industry since the 1930s and have earned the trust of manufacturers and compounders around the world for their reliable performance, consistent quality and dependable supply.

Microporous
Qemetica's precipitated silica products are a key component of battery separators and TESLIN® synthetic paper, providing microporosity that is the basis for a wide range of related performance benefits.