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F-13 Gutter Grenade 1 Gallon
|The black streaks in gutters are in the oxidation layer of the paint.
F-13 removes the oxidation and in turn removing the streaks and unlike butyl-based products that when diluted with water lose their strength rapidly, F-13 is effective at dilution ratios of 50-1.
F-13 can be used safely at dilution ratios as low as 5-1. 20-1 dilution normally removes the oxidation with light agitation, making F-13 very economical to use.|
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