SikaLastomer®-511 is a premium grade, high solids, non-skinning, non-drying butyl rubber-based caulk compound. The caulk has a short cutoff designed for caulking the female lip of standing seam roofs. It is a non-oxidizing sealant capable of withstanding joint movement without cracking, and can be used for concealed indoor and outdoor applications. The formulation stands up to intense water head pressures as certified by independent testing. SikaLastomer®-511 maintains permanent tack, allowing the caulk to be engaged in the field between two metal surfaces up to six months after initial application. SikaLastomer®-511 is available in 10.5 oz cartridges. Color: Off White.