L & R Ultrasonic Watch Rinsing Solution 1 Gallon Product Code: 121 Ideal solution for ultrasonic cavitation. Can be used with all L&R watch cleaning solutions. Fast drying and will not break down. Petroleum based, containing additional solvents for quicker drying than #3 Watch Rinse. US Gallon = 3.8 litres. Used to Rinse after use with either #111 Ultrasonic Waterless Watch Cleaning Solution #566 Non-Ammoniated Ultrasonic Watch Cleaning Solution #677 Clock Cleaning Solution