• 7210 Defoamer
• Size: 1 Gallon
• Appearance: Clear, pale yellow liquid
• Specific Gravity: 0.899 ± 0.005 @ 75 °F (24 °C)
• Flash Point: 74 °C (165 °F)
• Pound per Gallon: 7.50

Kester 7210 Defoamer is a non-silicone formulation designed to eliminate excessive foam in aqueous cleaning systems using tap, filtered or DI water. Although developed to control foam during alkaline saponifier spray cleaning of rosin flux residues, 7210 is also used to control foam caused by flux neutralizer solutions and some metal surface cleaning formulations. In spray cleaning operations where water-soluble flux and paste are being removed, 7210 will help reduce foam caused by surfactants used in these products. The silicone-free characteristic assures complete rinsing of the circuit board assemblies.

7210 is poured directly into the wash tank. No premixing is necessary. In general, 2 to 8 fluid ounces (59 to 237 mL) of 7210 are added to a typical 15.8 gallon (60 L) wash tank. The exact amount to use will depend on the particular cleaning equipment, water hardness, and other chemicals present in the wash solution.