APPLICATION & FEATURES: Trivalent Pretreatment for Aluminum Properties Cr(VI)-free pretreatment for aluminum based on trivalent chromium powder suitable as pretreatment before lacquering, powder coating and gluing also works on alloyed and casted aluminum easy to handle in immersion, spray and wipe application produces an iridescent, faintly blue to tan and visible layer heat resistant up to 100 °C with minimal loss in adhesion properties and corrosion resistance.