It cleans black streaks off gutters caused by electrostatic bonding.
Simply wet down the gutter, spray on Gutter Zap with a chemical injector and rinse off with garden hose pressure; light brushing with a soft brush is required on heavily soiled areas.
Gutter Zap will clean the gutter quickly & easily and will not harm vegetation or painted surfaces.
It will remove black marks from your gutters and make them look brand new.
In the ecologically friendly concentrated quart-size which dilutes up to 16:1