Pecora 890NST is a single-part, neutral-curing, ultra low-modulus silicone sealant that will not stain natural stone such as marble and granite and that reacts with atmospheric moisture to form a durable, flexible building sealant. It performs exceptionally well under dynamic conditions due to its ultra-low modulus, high extensions/compression, recovery properties and strong adhesion to most building materials and accommodates long-term movement of +100-50% in properly designed joints. Harsh weather conditions, rain, sleet, snow, sunlight and extreme temperatures, high ozone concentrations and/or exposure to intense ultra violet rays have very little effect on the ultimate performance of Pecora 890NST even after years of such exposure. It is particularly well suited for use in EIFS because of its proven strong adhesion to all base and top coats and because its ultra-low modulus formulation places minimal stress on the bond line.