Seal Bond 415 is a professional grade gutter & seam sealant. Formulated especially for sealing aluminum, galvanized and vinyl clad gutters and downspouts. SB 415 is a one-part formulation with semi-self-leveling properties for both horizontal and vertical applications. SB 415 is based on moisture cure hybrid polymer technology that reacts and cross-links in the presence of moisture to provide a durable seal with excellent weathering and UV resistance and performs in temperatures from -40° F to 200° F.