1/4" x 1" x 19' Hip & Valley
AST is a self-adhering foam tape impregnated with water-based acrylic-modified asphalt emulsion. It is an excellent alternative to butyl tape & open-cell polyurethane foam strips. Will not dry out and become hard and brittle, is UV-stable, highly resistant to bugs and vermin, conforms to contours and fills gaps, maintains a seal during thermal expansion and contraction of building panels, no shrinkage or blow-out due to closed-cell breakage. contains 26.