Loading... Please wait...FSS Stabilizer is a conditioning agent for use in new and existing Glycerin and Propylene Glycol based antifreeze solutions. FSS Stabilizer is added to antifreeze at a use concentration of 0.5 to 3.0%. FSS Stabilizer is desiged to buffer the pH of antifreeze that is begining to oxidize or degrade. Oxidation of antifreeze occures naturally over time. FSS Stabilizer assists in raising the pH of the antifreeze and also provides protection from the influences of MIC (Microbiological Induced Corrosion).