2320 Gutter and 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. Excellent adhesion to many building surfaces, even when damp or oily. Exceptional ultraviolet resistance. Paintable. Semi-self-leveling. Cleans up easily. Asphalt shingle compatible. Asphalt shingles, brick (masonry), concrete, glass, vinyl, wood, sheet metal, and other common building substrates. Not recommended for joints larger than 1/4" x 1/4". Do not use on traffic-bearing surfaces. Do not use in contact with Styrofoam. Not suitable for potable water applications