Gutter Zap

1 qt makes 3 gallons of ready to use product
Remove black streaks on gutters caused by electrostatic bonding of dirt, grime, and acid rain runoff from roofs
Depending on the strength you need, dilute half and half or one part product to three parts water.
This environmentally safe cleaner is 100% biodegradable
Removes heavy solids, dirt, and industrial stains. It can be used on aluminum or vinyl siding, concrete, floors, stainless steel, soap scum, or for spot cleaning.