Pecora 864NST is one-part, low-modulus, neutral-curing, high-performance silicone sealant that cures via atmospheric moisture to form a durable, flexible building seal. Pecora 864NST will not stain natural stone such as marble and granite. Because of its low-modulus, high extension/compression and recovery properties, and its strong adhesion to most building materials, Pecora 864NST performs exceptionally well under dynamic conditions accommodating long-term movement of ±50% in properly designed joints. Limitations: Pecora 864NST should not be used in the following applications: • Sealing horizontal decks, patios, driveway or terrace joints where abrasion or physical abuse is encountered. • Sealing submerged joints or below the waterline in marine applications. • In totally confined or air-free spaces. • In designs that will be painted after application of the sealant. (Sealant should be applied after painting is completed).