Will ChimneySaver damage asphalt shingles?
• An accidental spill or overspray of ChimneySaver on an asphalt shingle roof will not cause damage to the shingles other than discoloration. Until ChimneySaver dries it may float some asphalts to the surface of light colored shingles, thereby causing dark stains to appear. Stains can be removed with a soft brush using either a water-based degreasing cleaner or a chlorinated scouring powder, though scrubbing the shingles may damage them.