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​​​​​​​​​Rubber and Tire Additives

A large number of natural and synthetic rubbers such as NR, BR, SBR, NBR, EPDM, CR, and VMQ need additional reinforcing fillers to achieve the desired properties for the final product. The primary rubber reinforcing fillers are carbon blacks ("black" fillers) and precipitated amorphous silicas ("white" fillers). Reinforcing "white" fillers such as Grace's PERKASIL® precipitated silicas are effective in rubber formulations to add tear strength, abrasion resistance, and aging resistance to rubber products.


Environmental initiatives to reduce landfill and pollutants from discarded tires have motivated the tire industry to improve wear, performance, and longevity to help minimize tire waste. Use of PERKASIL® precipitated silicas reduces tread rolling resistance and improves dry/wet grip properties and tread wear. In OTR tire tread formulations, PERKASIL® silica improves cut, chip, and chunk resistance. In addition, PERKASIL® silica improves steel cord adhesion to rubber in the steel belt layer of the tire.

Technical Rubber

PERKASIL® precipitated silica improves the mechanical properties of the rubber vulcanisate, resulting in improved tensile strength, tear strength, tear resistance, and​ abrasion resistance. Typical applications for PERKASIL® silicas:

  • Roll coverings (NRB, EPDM, SBR)
  • Hoses (NBR, EPDM)
  • Conveyor belts (NR)
  • Transmission belts
  • Gaskets, seals (Q)
  • Cables
  • Sheathing (CR, CM)
  • Flooring


Reinforcing "white" fillers, such as PERKASIL® precipitated silicas, have advantages in footwear applications compared to "black" fillers including improved abrasion properties, reduced flex cracking and fatigue. In addition, white filled shoe soles leave no black marks on flooring. Grace's PERKASIL® silicas can be used in a variety of footwear applications:

  • Shoe soles
  • Transparent shoe soles
  • Micro-cellular soles
  • Thermoplastic rubber soles



PERKASIL® GT 3000 GRAN® GT 3000 GRANIs an HDS silica with medium surface area that brings significant improvement in all major performance properties compared to conventional types of silica resulting in tires
PERKASIL® KS 207® KS 207Is a precipitated Sodium Magnesium Aluminum Silicate with alkaline pH
PERKASIL® KS 300 GRAN® KS 300 GRANIs a precipitated silica with a medium surface area supplied in a granular form.
PERKASIL® KS 300PD® KS 300PDIs a precipitated silica with a medium surface area and a fine particle size.
PERKASIL® KS 408 GRAN® KS 408 GRANIs a precipitated silica with a high surface area supplied in a granular form. Its primary function lies in the tire industry as a high reinforcing filler.
PERKASIL® KS 408 PD® KS 408 PDIs a precipitated silica with a high surface area and a fine particle size. It can replace carbon black in white and colored technical rubber articles.