When using Roof & Deck Concentrate to clean vinyl siding, aluminum siding or painted surfaces at thirty to one should I allow it to dry?

No. On these surfaces only, you should not allow Roof & Deck to dry. A dwell time of five minutes is sufficient. Also, at this dilution it may be run through the downstream injector for application. A small test spot should be performed prior to cleaning painted surfaces and higher dilutions may be adjusted accordingly. Top • How long should I let Roof & Deck Concentrate soak before rinsing? Twenty minutes. However, shaded areas on roofs may require a little extra dwell time. Top • Will Roof & Deck Concentrate kill plants, grass or shrubs? No. However, you do not want to spray directly on the plants. Top • How many applications of Roof & Deck Concentrate should I apply for effective cleaning? One application is all it takes. Make sure to apply in an even over-lapping motion. Top • What if I have applied Roof & Deck Concentrate to a roof and get rained out? As long as Roof & Deck had proper soak time prior to rain, you will see that a good rain will completely clean the roof. ...  more