What happens to dried Apple Sauce after a few dry days?

[champ7x3]

Question: You apply apple sauce to the roof and walk away without rinsing it. Let's say that it does not rain for a couple of days. When the next rain does come, will the run off kill plants and grass, or will the sauce be weakened by then and pose no threat?

 

[David O'Connell Jr]

....depends on the rain. ITs the left over salt that kills. IF you get a lot of rain, then usually no problem, a DRIP then burnt leaves.