A1 is our strongest acidic foaming presoak! It has unique combination of solvents and detergents that will penetrate and remove the toughest soil and road film. This high foaming and free rinsing presoak works great with air foamers or friction curtains. A1 is an extremely strong presoak detergent trhat will bring back the shine to the most faded finishes! Use it once and you’ll know why we call it A1!