PRO CCA ULTRA is a highly effective corrosion inhibitor designed for racing engines. It provides excellent protection against rust and corrosion, even in harsh environments. Mixed at a ratio of 3% to 5%, it ensures long-lasting engine protection without affecting performance. PRO CCA ULTRA provides corrosion protection for all metals normally found in cooling systems and is harmless to seals, elastomers and all other non metals used in the cooling circuit.