INSTANT GUTTER SEAL GUTTER & NARROW SEAM SEALANT Instant Gutter Seal Gutter & Narrow Seam Sealant is a single-component, elastomeric, semi-self-leveling, high performance tripolymer sealant designed to prevent the passage of air and moisture through small joints or seams. Features - Excellent adhesion to many building surfaces, even when damp or oily -Exceptional UV resistance -Paintable -Semi-self-leveling -Cleans up easily -Asphalt shingle compatible