Eliminate spray waste and overlap by using spray colorants, drift and defoamer products. Spray colorants clearly mark treated areas in fields and gardens and also indicates drift. Drift Retardants prevent unwanted drifts that can cause harm to neighboring crops. Defoamer prevents unwanted foam buildup without affecting the performance of the pesticide or fertilizer. Foam Marker Concentrate is also a great way to mark where you have already sprayed. Another way to prevent unwanted chemical drift is to attach a Drift Guard to your Solo® sprayer. Start saving time and money today with defoamers, colorants and drift retardants. Check out the selection!