FLEET CHARGE® SCA Precharged 50/50 Antifreeze + Coolant is a Fully Formulated, ethylene glycol-based coolant, precharged with advanced technology Supplemental Coolant Additives (SCAs). Because it is SCA precharged, Fleet Charge SCA Precharged Antifreeze + Coolant requires no SCAs at initial fill and ensures proper chemistry at every top-off. FLEET CHARGE SCA Precharged Coolant/Antifreeze uses a low silicate and phosphate-free formulation.