AKTIFIT Q is an activated SILFIT Z 91, produced by modifying the surface with a methacrylic silane. The by-products split off during the treatment reaction are largely removed during the production process which firmly attaches the silane to the filler surface. This helps minimize undesirable side effects, which are potentially encountered with in-situ mixing (direct addition of silane to the compound).

A special process technology during the production of AKTIFIT Q provides high hydrophobicity as well as outstanding low moisture absorption even under very humid conditions.

During the vulcanization the methacrylic groups of the AKTIFIT Q react in the presence of radicals with the polymer.