Prestone Command DEF (Diesel Exhaust Fluid) is a liquid reducing agent developed for use in all diesel engines that are equipped with a Selective Catalytic Reduction (SCR) system.
- Formulated with high quality urea and pure demineralized water; nontoxic solution is 67.%% water and 32.5% automotive grade urea
- Colorless and odorless fluid
- Reacts with certain metals such as aluminum, copper and brass - use in only stainless steel or high density polyethylene tanks
- Does not require special handling