Product Short Description: It is also claimed that an antifreeze containing 3 to 15% benzotriazole is especially useful in preventing cavitation corrosion in high speed coolant pumps having aluminum housing and impellers. This could aid service life. Product Description: It is also claimed that an antifreeze containing 3 to 15% benzotriazole is especially useful in preventing cavitation corrosion in high speed coolant pumps having aluminum housing and impellers. This could aid service life.