Can I use the gallon concentrate straight from the container ( NOT pre diluted with 5 parts water ) to re fill the hose end sprayer bottle ?

Spray n forget’s answer says to dilute the gallon concentrate at 5:1. They also say the hose end version container automatically dilutes at 5:1. ??

The hose end sprayer is calibrated specifically for the Roof Cleaner formula to siphon out at a 5 to 1 mix ratio. If you were to purchase the concentrate, you would manually mix at a 5 to 1 ratio (1-part product to 5-parts water or 21 oz. of product to every gallon of water) and apply with a hand pump garden sprayer. It cannot be used as a refill for the hose end sprayer bottle. The formulation would overdilute and you would not get the desired results.