Gutterworks Mfg, Inc.

-Why are there black streaks on my gutters?

Black streaks are a common issue on many gutters. The black streaks are a result of electrostatic bonding of tar & asphalt from roofing material and other debris to aluminum metal material.

The good news is that these streaks are not a stain, it's just one form of material bonded to another, and can safely be removed.

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