It's also important to look for a sealant that is compatible with your gutter material to ensure proper adhesion and a long-lasting seal. Certain sealants, like silicone, won't adhere to metal.

by sealing a gutter seam using silicone or rubber gutter caulk or gutter sealant. A waterproof sealant such as GE Clear Gutter Caulk is easy to use: Simply squeeze this gutter seal into cracks and ...