Which order to add products to spray tank when mixing multiple products?

• A. Wettables, ECs, Flowables, Water Solubles
• B. Wettables, Flowables, Water Solubles, ECs
• C. Water Solubles, Wettables, Flowables, ECs
• D. Wettables, Flowables, Water Solubles, ECs

Answer: (B)

When mixing several products, the order you add them helps keep everything evenly dispersed and reduces the chance of incompatibilities or clumping. The best sequence is wettables first, then flowables, then water-solubles, and finally emulsifiable concentrates.

Wettables are powders that need to be wetted and dispersed in water. Adding them first while the tank is well-agitated helps them break up and stay in suspension rather than lumping together later when other products are already present.

Flowables are liquid suspensions of solids. They benefit from being added after the wettables so the initial dispersion in the tank remains uniform and the flowable particles don’t settle out or form concentrated pockets.

Water-soluble products dissolve readily in water, so they’re added after the solids are already dispersed to ensure they dissolve evenly rather than interacting with partially dispersed solids; this helps avoid uneven distribution or precipitation.

Emulsifiable concentrates contain oils and solvents and form emulsions. They’re best added last to minimize potential incompatibilities with the other formulations and to prevent them from destabilizing suspensions or causing premature emulsification of components already in the tank.

In short, this order supports stable, uniform mixing and reduces the risk of clumps, settling, or incompatible reactions.