Used to seal joints between two perpendicular surfaces subject to thermal movement. For sealing outdoor joints around door and window frames, sidings and glass in window frames. Adheres to steel, galvanized steel, metal, painted or stained wood, natural, painted or anodized aluminum, concrete, masonry, glass, fiberglass and vinyl (PVC). Instant resistance to rain. Extra flexible and durable. Can be stretched out to 1400% without getting cracked. 2-minute tack-free time.