Our finest sealant for copper, aluminum and steel gutter systems. Apply to end caps, miters, outlets, and slip joints for a water tight seal. Most commonly used for sealing joints in both copper and galvanized steel rain gutters. Use at slip joints, end caps, miters, and outlets for a leak free seal. Works better than typical latex sealers commonly used with aluminum gutter. Each tube is 5 oz. One tube can seal up to 12 typical seams or joints. Interior seals have a solder-like appearance. Color is gray.