OSI GS121 SERIES 1797609 GUTTER AND SEAM SEALANT, WHITE, LIQUID, 5 OZ CARTRIDGE
Designed for sealing around aluminum, galvanized and vinyl gutters and downspouts, sealing seam, joints and cracks in gutter troughs and for use on sheet metal, air conditioning and heating ducts and ventilators. Flexible, water-resistant seal. Expands and contracts with temperature changes. Cures to a tough rubbery gasket.