pf777AKTISIL PF 777 is a SILLITIN Z 86 coated with alkyle silane. Brand: AKTISIL Functions: Filler, Pment. Chemical Family: Calcium Salts, Silicon-based Compounds. Compatible Polymers &AKTISIL PF 777 is a SILLITIN Z 86 coated with alkyle silane. Brand: AKTISIL Functions: Filler, Pment. Chemical Family: Calcium Salts, Silicon-based Compounds. Compatible Polymers &