Specially designed for stop leakages caused by normal worn out of transmission and aged & dried out oil seals. Using products doesn’t fail warranty and can be added with all types of automatic transmission fluid with approval by car manufacturers. It excludes any granule substances to block oil line 奈circulation systems and auto oil filter. Free of corrosive ingredients and foam. Using this product can restore transmission function to normal and extends transmission life. Leakages should be stop after several hundred kilometers or several days of driving.